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JP2001333148

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DESCRIPTION JP2001333148
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
jacked electronic device equipped with a jack capable of plug insertion.
[0002]
2. Description of the Related Art Conventionally, jacks capable of plug insertion have a closed
circuit when the plug is not inserted, and electrically connect one terminal to the other terminal
by the closed circuit, and are already installed on one terminal side Electronic components (for
example, a speaker and a microphone) are connected. In addition, when the plug is inserted, the
closed circuit state is released and the open state (open circuit state) is established, and only the
other terminal is electrically conducted to the plug and connected to the electronic component
connected to the plug. ing. Therefore, when the plug is not inserted and when the plug is
inserted, the signal path is the same (that is, the signal path is in the sense that the signal from
the other terminal is input to the existing electronic component or the electronic component
connected to the plug). The same is true), since it is necessary to assume the plug insertion time
in the electronic device equipped with the jack, the signal path when the plug is not inserted is
also restricted by the electronic parts connected to the plug.
[0003]
For example, in an electronic device capable of audio reproduction, an electronic device equipped
with a jack to which an earphone plug can be attached allows DC component to flow to the
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speaker of the earphone plug even if the frequency characteristic of the speaker mounted in the
electronic device is wide band Since there is no case, it has been restricted that it is necessary to
insert a capacitor for DC component cutting between the speaker amplifier and the jack on the
assumption that the earphone plug will be attached.
[0004]
However, in the conventional electronic device with a jack, since it is necessary to insert a
capacitor for DC component cutting between the speaker amplifier and the jack, the frequency
characteristic is excellent in the entire band of the audio signal. Capacitors had to be inserted, but
had the problem of scraping.
Therefore, in the conventional electronic device, a small capacitor with small capacity is inserted
at the expense of the frequency characteristic, and there is a problem that the frequency
characteristic is sacrificed even when voice output is performed by the speaker mounted on the
electronic device. .
[0005]
In this jacked electronic device, it is required to change the signal path when the plug is not
inserted and when the plug is inserted, and to avoid the restriction of the electronic component
connected to the plug when the plug is not inserted.
[0006]
In order to satisfy this requirement, the present invention can change the signal path when the
plug is not inserted and when the plug is inserted, and can avoid the restriction of the electronic
component connected to the plug when the plug is not inserted. The purpose is to provide
electronic devices.
[0007]
SUMMARY OF THE INVENTION In order to solve this problem, the jacked electronic device
according to the present invention decodes and encodes input coded voice data to output as an
analog voice signal and digitizes an input analog voice signal. An electronic device with a jack
having a voice processing unit for encoding / encoding and outputting as encoded voice data, a
voice output unit for sending out an analog voice signal from the voice processing unit as voice,
and a jack capable of inserting a plug The jack has a first terminal to which an analog audio
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signal from the audio processing unit is input through a DC component cutting capacitor, and a
second terminal to which an analog audio signal from the audio processing unit is directly input.
And the third terminal connected in a conductive state on the input side of the audio output unit,
and when the plug is not inserted, the first terminal, the second terminal, and the third terminal
Was a conductive state with each other, at the time of plug insertion and a structure in which an
insulating state and a first terminal and a second terminal and a third terminal to one another.
[0008]
As a result, it is possible to obtain an electronic device with a jack that can change the signal path
when the plug is not inserted and when the plug is inserted, and can avoid the restriction of the
electronic component connected to the plug when the plug is not inserted.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION A jacked electronic device according to claim
1 of the present invention decodes and converts input coded voice data into an analog voice
signal and outputs it as an analog voice signal and digitizes and codes an input analog voice
signal. A jacked electronic device comprising: an audio processing unit for converting encoded
audio data and outputting it as encoded audio data; an audio output unit for transmitting an
analog audio signal from the audio processing unit as audio; and a jack to which a plug can be
inserted, The jack has a first terminal to which an analog audio signal from the audio processing
unit is input through a capacitor for cutting a DC component, a second terminal to which an
analog audio signal from the audio processing unit is directly input, and audio A third terminal
connected in a conductive state is provided on the input side of the output unit, and when the
plug is not inserted, the first terminal, the second terminal, and the third terminal are electrically
connected to each other And then, at the time of plug insertion is obtained by the fact that a
mutually insulated state and the first terminal and the second terminal a third terminal.
[0010]
With this configuration, it is possible to change the signal path to the jack when the plug is not
inserted and when the plug is inserted. For example, the path of the analog audio signal is
changed when the plug is not inserted and when the plug is inserted. This has the effect of
enabling output to the output unit.
[0011]
The electronic device with a jack according to claim 2 is the electronic device with a jack
according to claim 1, wherein the jack is an analog from the audio processing unit input to the
first terminal and the second terminal when the plug is not inserted. The audio signal is output to
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the audio output unit via the third terminal.
[0012]
With this configuration, the analog audio signal from the audio processing unit is output to the
audio output unit through the second terminal to which the audio processing unit is directly
input. Therefore, the electronic device of which the frequency characteristic from the audio
processing unit to the audio output unit is plug connection And the effect of being prevented
from deteriorating under the restriction of
[0013]
The electronic device with a jack according to claim 3 is the electronic device with a jack
according to claim 1, wherein when the plug is inserted, the jack connects the analog audio
signal from the audio processing unit input to the first terminal to the plug Is output to the voice
output unit.
[0014]
With this configuration, the analog audio signal from the audio processing unit is output to the
audio output unit via the capacitor for DC component cutting and the first terminal, so that the
DC component flows in the speaker connected to the plug. It has the effect of being prevented.
[0015]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to
4.
[0016]
(First Embodiment) FIG. 1 is a block diagram showing a portable radio telephone apparatus as an
electronic apparatus with a jack according to a first embodiment of the present invention, and
FIG. 2 is a circuit diagram showing in detail the vicinity of the jack in FIG. is there.
[0017]
In FIG. 1, 101 is an antenna for transmitting and receiving radio waves to and from a radio base
station (not shown), 102 is a radio circuit unit for generating and demodulating radio signals, and
103 is a control circuit unit for controlling the whole. Is a display unit such as an LCD, 105 is a
key operation unit, 106 is an audio processing unit for converting encoded audio data into an
analog audio signal and converting an analog audio signal into encoded audio data, 107 is an
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audio output such as a speaker Reference numeral 108 denotes an audio input unit such as a
microphone, 109 denotes a jack, and 110 denotes a peripheral circuit unit disposed between the
audio processing unit 106 and the jack 109.
[0018]
Further, in FIG. 2, since the voice processing unit 106, the voice output unit 107, the voice input
unit 108, the jack 109, and the peripheral circuit unit 110 are the same as those in FIG.
A1 and A2 are amplifiers on the audio output side, A3 is an amplifier on the audio input side, C1
and C2 are capacitors for cutting the DC component, C3 is a capacitor forming a low pass filter
together with the resistor R1, R2 is Resistor for gain adjustment, J1 is the ground terminal of jack
109, J2 is the first terminal of jack 109 (the other terminal in the conventional example), J3 is
the second terminal of jack 109, J4 is the third terminal of jack 109 A terminal (one terminal in
the conventional example), J5 is a fourth terminal of the jack 109, and J6 is a fifth terminal of the
jack 109.
[0019]
Next, the function, operation, etc. of each part will be described.
[0020]
In FIG. 1, the antenna 101 transmits the radio signal input from the radio circuit unit 102 as a
radio wave to the radio base station at the time of transmission, and receives the radio wave
transmitted from the radio base station at the time of reception. A wireless signal is output to the
wireless circuit unit 102.
At the time of transmission, the wireless circuit unit 102 modulates transmission data input from
the control circuit unit 103 to a frequency specified by the control circuit unit 103 to generate a
wireless signal, and outputs the wireless signal to the antenna 101.
At the time of reception, a radio signal input from the antenna 101 is demodulated, and reception
data is output to the control circuit unit 103.
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[0021]
The control circuit unit 103 controls the wireless circuit unit 102, the display unit 104, and the
audio processing unit 106, and processes data input to and output from the wireless circuit unit
102 (in transmitting, effective data to be transmitted). Processing to generate transmission data
by adding synchronization data, error check data and control data according to the system,
detection of synchronous data, error check, identification of control data and extraction of
effective data) Audio data is input to and output from the audio processing unit 106.
The display unit 104 displays information on visual data to the operator of the portable wireless
telephone device.
[0022]
The operator of the portable radio telephone apparatus operates the key operation unit 105 to
realize a desired function.
The key operation unit 105 outputs a signal to the control circuit unit 103 by pressing the key.
The control circuit unit 103 executes a program for realizing the requested function according to
the signal input from the key operation unit 105.
[0023]
The audio processing unit 106 decodes the audio data input from the control circuit unit 103
according to the specification of the audio coding scheme, further converts the analog data to
generate an audio signal, and outputs the audio signal to the audio output unit 107 via the jack
109. .
Further, the voice signal input from the voice input unit 108 through the jack 109 is converted
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into digital data, further encoded according to the specifications of the voice coding method,
voice data is generated, and is output to the control circuit unit 103.
The audio output unit 107 outputs the audio signal input from the audio processing unit 106 as
audio.
The voice input unit 108 outputs a voice input when the operator of the portable radio telephone
apparatus speaks to the voice processing unit 106 as a voice signal.
The jack 109 connects the audio output side of the audio processing unit 106 and the audio
output unit 107 and connects the audio output side of the audio input unit 108 and the audio
input side of the audio processing unit 106 when the plug is not inserted.
[0024]
Further, in FIG. 2, the audio processing unit 106 outputs an audio output signal 106 a and a
microphone bias signal 106 c, and the audio processing unit 106 receives an audio input signal
106 b.
An inverting amplification amplifier A1 is placed on the output line of the audio output signal
106a and connected to the audio output unit 107.
Similarly, on the output line of the audio output signal 106a, an amplifier A2 for amplification is
placed and connected to the J3 terminal (second terminal) of the jack 109.
The audio output signal 106a is branched at the outlet of the amplifier A2 and connected to the
J2 terminal (first terminal) of the jack 109 via a capacitor C1 for cutting a DC component.
An amplifier A3 for amplification and a capacitor C2 for cutting a DC component are placed on
the input line of the audio input signal 106b, and are connected to the J6 terminal of the jack
109. On the output line of the microphone bias signal 106 c, the capacitor C 3, the resistor R 1
forming a low pass filter, and the resistor R 2 for adjusting the gain of the audio signal input
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from the audio input unit 108 are mounted. Is connected to the J6 terminal of
[0025]
The microphone bias signal 106c is a digital signal, and a high potential (hereinafter referred to
as "Hi") of about 3 V and a low potential (hereinafter referred to as "Lo") of about 0 V are output.
When the microphone bias signal 106 c is Hi , the audio signal from the audio input unit 108
is input to the audio input signal 106 b. The other end of the audio output unit 107 not
connected to the amplifier A1 is connected to the J4 terminal (third terminal) of the jack 109,
and the audio input unit 108 is connected to the J5 terminal of the jack 109 and the ground
(GND). The jack 109 has a J1 terminal, a J2 terminal, a J3 terminal, a J4 terminal, a J5 terminal
and a J6 terminal, and the J1 terminal is connected to GND, and when the plug is not inserted,
the J2 terminal, the J3 terminal, the J4 terminal and the J5 terminal The J6 terminals are
respectively connected to form three closed circuits (a closed circuit of J2 and J3, a closed circuit
of J2 and J4, and a closed circuit of J5 and J6). When the plug is inserted, the three closed
circuits become open (the first terminal J2, the second terminal J3 and the third terminal J4 are
mutually insulated, and the fourth terminal J5 and the fifth terminal J6 Is in an isolated state),
and the J1 terminal, the J2 terminal and the J6 terminal are connected to the plug. Also, when
the plug is not inserted, the J2 terminal, the J3 terminal and the J4 terminal of the jack 109 are
short-circuited (J2, J3 and J4 become conductive to each other), and the output of the amplifier
A2 is the J3 terminal of the jack 109 and J4. It is directly connected to the audio output unit 107
via a terminal.
[0026]
In the portable radio telephone apparatus configured as described above, the peripheral circuit
section 110 when the plug is not inserted into the jack 109 is equivalent to that shown in FIG.
FIG. 3 is a circuit diagram showing an equivalent circuit of the peripheral circuit unit 110 when
no plug is inserted into the jack 109. As shown in FIG.
[0027]
In FIG. 3, the audio processing unit 106, the audio output unit 107, the audio input unit 108, the
jack 109, the peripheral circuit unit 110, the amplifiers A1 to A3, the capacitors C2 and C3, the
resistors R1 and R2, and the terminals J1 to J6 are shown in FIG. The same reference numerals
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are assigned and the description is omitted. As can be seen from FIG. 2, when the plug is not
inserted, the capacitor C1 is in a short-circuited state, which is equivalent to the absence of the
capacitor C1, and a circuit as shown in FIG. 3 is obtained. The operation in FIG. 3 will now be
described.
[0028]
At the time of transmission, an audio signal input from the audio input unit 108 passes through
the J5 terminal and J6 terminal of the jack 109, the capacitor C2 and the amplifier A3 to become
an audio input signal 106b, and is input to the audio processing unit 106. The audio processing
unit 106 converts the input audio input signal 106 b into a digital signal and further encodes it,
and outputs audio data to the control circuit unit 103. The control circuit unit 103 performs data
processing on the input voice data and outputs transmission data to the wireless circuit unit 102.
The wireless circuit unit 102 modulates the input transmission data and outputs a wireless signal
to the antenna 101. The antenna 101 transmits the input radio signal as a radio wave to the
radio base station.
[0029]
Further, at the time of reception, the antenna 101 outputs the received radio wave to the wireless
circuit unit 102 as a wireless signal. The wireless circuit unit 102 demodulates the input wireless
signal and outputs received data to the control circuit unit 103. The control circuit unit 103
performs data processing on the input reception data and outputs valid data, that is, voice data to
the voice processing unit 106. The audio processing unit 106 decodes the input audio data,
converts it into analog log, and outputs it as an audio output signal 106 a. The audio output
signal 106 a is differentially amplified output by the amplifier A 1 and the amplifier A 2, the
audio signal inverted and amplified by the amplifier A 1 is directly to one end of the audio output
unit 107, and the audio signal amplified by the amplifier A 2 is J 3 of the jack 109 The signal is
input to the other end of the audio output unit 107 via the terminal and the J4 terminal. The
voice output unit 107 outputs the input voice signal as voice. As described above, since the audio
output signal 106a does not pass through the capacitor, a wide-band audio output independent
of the frequency characteristic of the capacitor is possible. The above operation makes it possible
to make a call when the plug is not inserted.
[0030]
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Next, when the operator of the portable radio telephone apparatus inserts a headset plug into the
jack 109, the peripheral circuit unit 110 is as shown in FIG. FIG. 4 is a circuit diagram showing
an equivalent circuit of the peripheral circuit unit 110 when a plug is inserted into the jack 109.
As shown in FIG.
[0031]
4, audio processing unit 106, jack 109, peripheral circuit unit 110, amplifiers A2 and A3,
capacitors C1 to C3, resistors R1 and R2, and terminals J1 to J6 are the same as those in FIG.
And the explanation is omitted. Reference numeral 107a denotes an audio output unit of the
headset connected to the plug, and reference numeral 108a denotes an audio input unit of the
headset connected to the plug. As can be seen from FIG. 2, at the time of plug insertion, the third
terminal J4 is in an insulated state from the first and second terminals J2 and J3 and is
equivalent to the absence of the amplifier A1, as shown in FIG. It becomes such a circuit. The
audio output unit 107a is connected to the J1 terminal and the J2 terminal of the jack 109. The
voice input unit 108a is connected to the J1 terminal and the J6 terminal of the jack 109. The
operation in FIG. 4 will now be described.
[0032]
At the time of transmission, an audio signal input from the audio input unit 108a of the headset
passes through the J6 terminal of the jack 109, the capacitor C2 and the amplifier A3 to become
an audio input signal 106b, and is input to the audio processing unit 106. The audio processing
unit 106 converts the input audio input signal 106 b into a digital signal, further encodes the
signal, and outputs audio data to the control circuit unit 103. The control circuit unit 103
performs data processing on the input voice data and outputs transmission data to the wireless
circuit unit 102. The wireless circuit unit 102 modulates the input transmission data and outputs
a wireless signal to the antenna 101. The antenna 101 transmits the input radio signal as a radio
wave to the radio base station.
[0033]
Further, at the time of reception, the antenna 101 outputs the received radio wave to the wireless
circuit unit 102 as a wireless signal. The wireless circuit unit 102 demodulates the input wireless
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signal and outputs received data to the control circuit unit 103. The control circuit unit 103
performs data processing on the input received data, and outputs valid data, that is, voice data to
the voice processing unit 106. The audio processing unit 106 decodes the input audio data,
further converts it into an analog signal, and outputs it as an audio output signal 106 a. At this
time, by inserting the headset plug into the jack 109, the closed circuit constituted by the J2
terminal and the J3 terminal or the J2 terminal and the J4 terminal of the jack 109 is in an open
state, so the audio output signal 106 a is connected to the audio output unit 107 a via the
amplifier A 2, the capacitor C 1 and the J 2 terminal of the jack 109. The DC component can be
cut by passing through the capacitor C1. With the above operation, a call can be made when the
headset plug is inserted.
[0034]
As described above, in the present embodiment, the jack 109 is connected to the first terminal J2
to which the analog audio signal from the audio processing unit 106 is input via the capacitor C1
for cutting the DC component, and the jack 109 from the audio processing unit 106. It has a
second terminal J3 to which an analog audio signal is directly input, and a third terminal J4
connected to the input side of the audio output unit 107 in a conductive state, and when the plug
is not inserted, the first terminal J2 and the The second terminal J3 and the third terminal J4 are
brought into conduction with each other, and the first terminal J2, the second terminal J3 and
the third terminal J4 are brought into insulation from each other when plug insertion is
performed. It becomes possible to change the path of the signal up to the jack 109 when the plug
is not inserted and when the plug is inserted. For example, the path of the analog audio signal is
changed when the plug is not inserted and when the plug is inserted. Can be output to 7, the
constraints of the electronic components connected to the plug (e.g., voice output unit 107a) can
be avoided at the time the plug is not inserted.
[0035]
That is, when the plug is not inserted, the jack 109 outputs the analog audio signal from the
audio processing unit 106 input to the first terminal J2 and the second terminal J3 to the audio
output unit 107 via the third terminal J4. As a result, the analog audio signal from the audio
processing unit 106 is output to the audio output unit 107 through the second terminal J3
directly input, so the frequency from the audio processing unit 106 to the audio output unit 107
It is possible to prevent the characteristic from being deteriorated due to the restriction of the
plug connection electronic device.
In addition, the jack 109 outputs the analog audio signal from the audio processing unit 106
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input to the first terminal J2 to the audio output unit 107a connected to the plug at the time of
plug insertion, thereby the audio processing unit 106. Is output to the audio output unit 107a
(for example, a speaker) through the capacitor C1 for cutting the DC component and the first
terminal J2 so that the DC component flows in the speaker connected to the plug. It can be
prevented.
[0036]
As described above, according to the jacked electronic device of the present invention, the input
coded voice data is decoded and converted into an analog voice signal and output as an analog
voice signal. An electronic jack equipped with an audio processing unit that digitizes / encodes
and outputs as encoded audio data, an audio output unit that transmits an analog audio signal
from the audio processing unit as audio, and a jack capable of inserting a plug The jack is a first
terminal to which an analog audio signal from the audio processing unit is input through a
capacitor for cutting a direct current component, and a second terminal to which an analog audio
signal from the audio processing unit is directly input And the third terminal connected in a
conductive state to the input side of the audio output unit, and when the plug is not inserted, the
first terminal, the second terminal, and the third end And the first terminal, the second terminal,
and the third terminal are isolated from each other at the time of plug insertion, so that the paths
of signals to the jacks are at the time of plug uninsertion and at the time of plug insertion. For
example, the path of the analog audio signal can be changed at the time of plug uninsertion and
at the time of plug insertion and can be output to the audio output unit, so the restriction of the
electronic parts connected to the plug is possible. There is an advantageous effect that it can be
avoided when the plug is not inserted.
[0037]
According to the electronic device with a jack according to claim 2, in the electronic device with a
jack according to claim 1, when the plug is not inserted, the audio processing unit inputted to the
first terminal and the second terminal is used. Is output to the audio output unit through the
third terminal, the analog audio signal from the audio processing unit is output to the audio
output unit through the second terminal directly input, The advantageous effect is obtained that
the frequency characteristics from the audio processing unit to the audio output unit can be
prevented from being deteriorated due to the restriction of the plug-connected electronic device.
[0038]
According to the electronic device with a jack according to claim 3, in the electronic device with a
jack according to claim 1, the jack plugs the analog audio signal from the audio processing unit
input to the first terminal when the plug is inserted. The analog audio signal from the audio
processing unit is output to the audio output unit via the capacitor for DC component cut and the
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first terminal by being output to the audio output unit connected to the The advantageous effect
is obtained that it is possible to prevent a direct current component from flowing to the audio
output unit (e.g., the speaker) that has been selected.
[0039]
Brief description of the drawings
[0040]
1 is a block diagram showing a portable radio telephone apparatus as a jacked electronic device
according to the first embodiment of the present invention.
[0041]
2 is a circuit diagram showing the vicinity of the jack in FIG. 1 in detail.
[0042]
Figure 3 is a circuit diagram showing an equivalent circuit of the peripheral circuit section when
no plug is inserted into the jack
[0043]
Fig. 4 is a circuit diagram showing an equivalent circuit of the peripheral circuit portion when the
plug is inserted into the jack
[0044]
Explanation of sign
[0045]
101 antenna 102 radio circuit unit 103 control circuit unit 104 display unit 105 key operation
unit 106 audio processing unit 107, 107a audio output unit 108, 108a audio input unit 109 jack
110 peripheral circuit unit A1, A2, A3 amplifier (amplifier) C1, C2, C3 capacitor R1, R2 resistor
J1 ground terminal J2 first terminal J3 second terminal J4 third terminal J5 fourth terminal J6
fifth terminal
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