PUSH-PULL POWER AMPLIFIER CIRCUIT USING STATIC INDUCTION TRANSISTOR OF THE SAME CONDUCTIVE TYPE

PROBLEM TO BE SOLVED: To provide an amplifier that dispenses with a choke coil driving a speaker, facilitates the selection of characteristics of a static induction transistor for output, and improves negative/positive balance in a power amplifier for audio using a static induction transistor for the final stage. SOLUTION: Two N-channel static induction transistors having the same conductive type, especially even characteristics, are overlapped in series as an output stage, both of them are biased each by serially connected power supplies having an identical voltage, and a speaker is driven from the intermediate terminals of both N-channel static induction transistors and the power supplies. COPYRIGHT: (C)2009,JPO&INPIT