| 摘要 |
PROBLEM TO BE SOLVED: To provide a feedforward amplifying circuit which does not damage a distortion removal loop even in the state that operation of a main amplifier is unstable. SOLUTION: In starting the feedforward amplifying circuit 10, a power supply switch SW3 is turned on to supply an auxiliary amplifier 24 with power after a power supply switch SW2 is turned on and operation of the main amplifier 16 becomes stable. In stopping the feedforward amplifying circuit 10, after the power supply switch SW3 is turned off to stop the auxiliary amplifier 24, the power supply switch SW2 is turned off to stop the main amplifier 16. Thus, it is avoided that excessive power is applied to the auxiliary amplifier 24 and a terminal resistor 34 connected to a distortion compensation connector 28. COPYRIGHT: (C)2011,JPO&INPIT
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