Electronic circuit for sepg. analogue DC signals - uses two Darlington transistor stages with chopper circuit

摘要

The appts. includes a transformer, a chopper circuit, and an auxiliary d.c. source on the sec. side of the transformer. The sec. winding of the transformer is connected via the chopper circuit, a sec. transistor stage creating a load-independent output current and an output resistor, to source. The latter delivers a control voltage for the chopper circuit and stage; and the prim. of the transformer is connected to a rectifier circuit and input terminals, which are sepd. from a circuit by a transistor stage for impedance conversion. The two transistor stages are pref. Darlington circuits. This type of circuit requires only one source on the sec. side of the transformer, and this source can drive several circuits.