Logic circuit receiving two three-level input signals - has diode bridge rectifier to produce output signal only when input signals have opposite polarities

摘要

The logic circuit, for two triple-level input signals, i.e. positive zero or negative has a double-level output, i.e. zero and either positive or negative. It adopts one output level only when one of its input levels is positive and the other negative. A 4-diode rectifier bridge (4) receives the two input signals (1, 2) at its ac inputs (5, 6) and drives with its dc outputs (13, 14) two complementary transistors (17, 18) connected together by their emitters. The collectors of the transistors produce the output signals and are coupled via resistors (19, 20) to positive and negative supply poles.