This phase inverter with transistors, used in audio amplifiers, was found in a French publication from the 1980s. The transistors can be the BC548 and the power obtained from the amplifier with which the circuit must operate.

This phase inverter with transistors, used in audio amplifiers, was found in a French publication from the 1980s. The transistors can be the BC548 and the power obtained from the amplifier with which the circuit must operate.