Nonsaturating bipolar logic gate having a low number of components and low power dissipation

摘要

A two input nonsaturating bipolar logic gate consists of just two bipolar transistors plus a pair of resistors plus two voltage buses. One resistor has a resistance RC and it is connected from one of the voltage buses to the collector of both transistors. The second resistor has a resistance RE and it is connected from the other voltage bus to the emitter of both transistors. Those resistances RC and RE are selected such that RC/RE>1 and 0.1<(VCC-VBE)RC/RE<0.8 VBE where VBE is the base to emitter voltage at which each transistor turns on and VCC is the voltage between the two voltage buses.