Power stage for two balanced-to-earth binary output signals

摘要

The proposed power stage for two balanced-to-earth binary output signals is activated by a binary input signal whose logic levels are balanced to earth. The input signal arrives at the bases of a first transistor pair and the input signal inverted by an inverter arrives at the bases of a second transistor pair. Depending on the binary value of the input signal, the collector-emitter path is rendered conducting in each case in one transistor of each transistor pair and in this way a supply voltage source is applied with a polarity dependent on the binary value of the input signal to the output terminals of the power stage. The pole potentials of the supply voltage source are balanced to earth. The output voltages of the power stage are stabilised with resistors and a diode bridge.