Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS6062214 [0001] (A) Industrial Application Field The present invention relates to a power consumption efficient amplifier circuit. (B) Prior Art FIG. 1 shows a conventional 5 EPP amplifier circuit with an OC (OUTPUT CODENDERS). (1) and (2) are a left channel signal input terminal and a right channel signal input terminal, respectively. By the way, the input signal of the audio amplifier is a low frequency signal 8 (audio frequency signal), and the left channel signal (L) and the right channel signal (R) are often in phase. Therefore, when a positive half cycle signal is input to such a 5EPP amplifier circuit (3) <4), a current loop as shown by a solid line (IL1) (IRI) is formed. Therefore, the smoothing capacitor (6) on the secondary side of the power supply circuit (5) needs a large capacity, and if the output of the audio signal (L) (R) is to be amplified to about 20 Hz, the power supply circuit (5 Although it depends on the design of the transformer), a capacity of about 10 ° 000 μF is required. In addition, if amplification is attempted to about 20 Hz without increasing the capacity of the smoothing capacitor (6), the power supply voltage must be increased. As described above, if the power supply voltage is improved or the capacity of the smoothing capacitor (6) is increased, it is sufficient for audio output at 20 Hz, but there is an allowance for 1000 I (audio output at z. Such a large cost in the capacity required by the frequency makes it commercially inefficient. (C) Object of the Invention The present invention has been made in view of the above-mentioned problems, and provides a power supply circuit which improves the utilization efficiency of the power supply and which requires a relatively small capacity smoothing capacitor, Provides an amplifier circuit capable of obtaining The present invention is configured to invert one of the left channel signal and the right channel signal. (E) Embodiment FIG. 2 is a circuit diagram of an amplification circuit obtained by implementing the present invention J. The same components as in FIG. 1 are assigned the same reference numerals. 9) is a 5EPP amplification circuit for amplifying the left channel @ No. 6) is an operational amplifier in which a feedback element (73) is connected to the inverting input terminal (to), and an output 10-05-2019 1 capacitor (C +) The resistor (RL) is grounded in series. ("Is the right channel (i14 (R> is a 5EPP amplification circuit that amplifies" 4 ") is an operational amplifier whose feedback element (f3) is connected to the inverting input terminal (→), between its output end and ground) The output capacitor (C2) and the load resistance (RR) are connected in series. The non-inverted input terminal (1-) Q of the 5EPP amplifier circuit (4) receives the right channel signal (R) via the inverter 17 and works. ! Reference numeral 5+ is a power supply circuit, which comprises an AC power supply input terminal, a double-f Aodo rectifier circuit (s +), and a smoothing capacitor 00), and the positive side of the smoothing capacitor (b) is a power supply terminal of the operational amplifier 6υIAI. , The negative side is the operational amplifier (31)! 41)-The power supply terminal is connected between the connection point of the load resistance (RL) (RR) and the ground. The operation of the present invention having such a configuration will be described. Now, the left channel (il $ 9 (L) and right channel signal (R) in phase positive cattle cycle signals are input to the left channel signal input terminal (1) and the right channel signal input terminal (2). Then, since the positive left channel No. d (L) is amplified by the op amp 1), the solid current (IL +) loop shown in FIG. 2 is formed, and the power is load (RL) from the smoothing capacitor @ 0). Supplied to By the way, since the right channel signal +) (R) is inverted by the inverter (7) and converted into a negative half cycle, the output of the operational amplifier '41) becomes a negative potential and the charge stored in the output capacitor (C2) is a load It is released 71 j to resistance (RR) to form a military loop (IRI). Therefore, at this time, the power supplied to the load resistance (RR) K is not the smoothing capacitor @ 0) but the power of the output capacitor (C2), so 珀 11N of the smoothing capacitor @ 0 is of the left channel signal (L) It will only be a burden. In the negative half cycle of the left channel signal (L) and the right channel channel-(R), as shown by the dotted line, the discharge current loop (RL2) of the output capacitor (C1) and the smoothing capacitor (6 (]) K Becomes a current loop (IR2), jF? The burden on the i7 Condenser is lightened. By the way, load at this time (R1? The power of reverse phase is supplied to the), but the @ load (RR) actually connected is the speaker, so as shown in FIG. 6, the ■ and θ terminals of the speaker (8) are reversed. Connect if it's 17-I. (E) Effects of the Invention As described above, according to the present invention V, it is simple because only the inverting circuit for inverting the phase of one channel signal among the channel signals of half of the capacity pair of the conventional power supply is provided. Still, with battery operation, the peak value of the current consumption is only half that of the conventional one, so the battery life is extended. [0002] Brief description of the drawings [0003] 10-05-2019 2 FIG. 1 is a diagram showing an amplifier circuit comprising a conventional 5EPP amplifier circuit with OC, FIG. 2 is a diagram showing an amplifier circuit according to the present invention, and FIG. 6 is a diagram provided for detailed explanation of the present invention. (1) ... left channel signal terminal, (2) ... right channel turn terminal, (3) (4) ... 5 EPP amplification circuit, (5) ... power supply circuit, (7) ... -Inverter (inverting circuit),---smoothing capacitor. Figure 1 Figure 3 10-05-2019 3
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