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JPS57104685

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DESCRIPTION JPS57104685
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a prior art example, FIG. 2 is a
view showing impedance characteristics, and FIG. 3 is a view without showing one embodiment
of the present invention. 1: Speaker for low-pitched sound, 3: output amplification circuit, 4:
ceramic speaker for high-pitched sound, 6: inductor.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device
used for a stereo, radio and radio tag recorder, and the like. 2. Description of the Related Art
Conventionally, dynamic speakers are known as high-pitched speakers and low-pitched speakers.
However, recently, ceramic loudspeakers and other electrostatic loudspeakers have been used as
high-tone subwoofers for cost reasons7, q7862 (see FIG. 1). In FIG. 1, (lj is a bass impedance, (2)
is a high-tone ceramic speaker, and (3) an H output amplifier circuit. The impedance
characteristic of the ceramic speaker (2) decreases as the frequency increases as shown in FIG.
2a. Therefore, the output of the output amplification circuit (3) is supplied to the high frequency
Jilt old ceramic speaker (2). The high frequency component 1J 100 KHz or more here is
indicated. Therefore, for example, a ceramic speaker is used as a high-pitched speaker, and a high
frequency circuit (not shown) of a radio receiver is placed near the power of a biviber. It had an
adverse effect on the characteristics and performance. Therefore, the present invention is to
provide a speaker system and an eight-panel system which solves the above-mentioned points.
Hereinafter, one embodiment of the present invention will be described in detail with reference
to FIG. 2 and FIG. FIG. 6 is a view showing an embodiment of the present invention. As shown in
FIG. 6, according to the present invention, inductors 4 'are inserted 88' and +6 between an
output amplifier circuit 3 and an electrostatic speaker 2 such as a high-tone ceramic type. InPiece Dance Characteristics of Inductor (4) As shown in FIG. 2, as the frequency increases, the
impedance also increases with X = wL. Therefore, according to the characteristic of the
composite impedance of the ceramic speaker and the inductor shown in FIG. 2C, the high
frequency components of LW% MW and SW band of 100 phantom lines or more have no effect
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on the passband (3 to 20 Kl) of the high tone speaker. In the inductor, the supply to the ceramic
speaker is blocked by the inductor, and stable reception becomes possible. As described above,
according to the present invention, according to the present invention, simply by inserting an
inductor between the output amplification circuit and the electrostatic type speaker such as a
ceramic type for high-frequency sound, a high frequency provided in the vicinity of the
conventionally generated speaker The adverse effects of feedback oscillation and operation
instability of the circuit can be solved.
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