| 摘要 |
PROBLEM TO BE SOLVED: To reduce the total loss in a power source part and an amplifier part. SOLUTION: This amplifier circuit is constituted by connecting a power line between power output stage transistors Q11, Q12 and a first power source circuit and a power supply line to supply voltage from a second power source circuit and to supply the voltage from a volume linked variable power source circuit 15 to the power output stage transistors Q11, Q12 in parallel in the power source part consisting of the first power source circuit to generate a DC power source voltage±VccL to supply voltage to the amplifier part and the second power source circuit to generate second DC power source voltage±VccH higher than the DC power source voltage±VccL.
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