Realize high efficiency class an amplifier's circuit

The utility model relates to a realize high efficiency class an amplifier's circuit, including operational amplifier, bias circuit, just / reverse power drive circuit and electric current set up the circuit, operational amplifier's output connection bias circuit, the positive reverse bias signal connection of bias circuit output just / reverse power drive circuit, just, be connected with the electric current between the reverse power drive circuit and set up the circuit, just / reverse power drive circuit be used for the drive just / the backward power pipe, just / input of reverse power drive circuit has two, one is being positive reverse bias signal, one is that the electric current sets up the signal that the circuit produced, the utility model discloses according to load conditions dynamic adjustment output current, guarantee the amplifier output and work completely in the class A that extravagant output current has as far as possible simultaneously avoided traditional class an amplifier big problem of generating heat, has also avoided class B or class AB to have the crossover distortion problem. According to load and output dynamic adjustment amplifier output current, effectively promote output efficiency simultaneously.