Chopper circuit for DC-isolated transmission of bipolar measurement currents

摘要

A chopper circuit for DC-isolated transmission of bipolar measurement currents has a 2-way push-pull transformer (4), a chopper circuit (3) on the input side, a control circuit (6) for synchronously driving the transistors (T1 to T4) of the chopper circuit (3) and a 2-way synchronous rectifier circuit (5) on the output side. The chopper circuit (3) consists of two semiconductor switching arrangements (15, 16) which in each case have two bipolar pnp or npn transistors whose emitter-collector paths are connected in parallel with each other. <IMAGE>