CLASS-AB PUSH-PULL DRIVE CIRCUIT

The gate of a first source-grounded transistor and the input of a buffer circuit are directly connected to an input terminal of a class-AB push-pull circuit. An input signal directly drives the first source-grounded transistor and is transmitted through the buffer circuit to a voltage-to-current converter and converted into a current signal. On receipt of the current signal, an inverting amplifier develops a voltage of reversed polarity which is applied to the gate of a second source-grounded transistor to drive the second transistor. The drains of the first and second transistors are connected to each other and their connecting point serves as an output terminal of the circuit. A class-AB push-pull drive circuit having such an arrangement requires a significantly reduced input signal voltage and a reduced power supply voltage.