Basic logic circuit having multi-emitter transistor

Details Basic logic circuit having multi-emitter transistor Basic logic circuit having multi-emitter transistor

1994-10-04

1995-08-01

Hudspeth, David R.

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Bipolar transistor

327480, H03K 1920

Patent

active

054382840

ABSTRACT:
A basic logic circuit 10 which functions as a data selector consists of a basic circuit 11, a HET (hot electron transistor) 12, the first and second emitters of which are connected to the first emitter of a HET 16 and a data input end A respectively, and an inverter 13 connected to an output end of the circuit 11. In a HET 14 having no base electrode, its collector is connected to a power supply line VCC via a load resistor 15, its first emitter is used exclusively for current output by connecting to the collector of the HET 16 the second emitter of which is connected to a power supply line VSS, its second emitter is used for current input/output by directly connected to a control input end S, and its third emitter is used exclusively for current input by connecting to the first emitter of a HET 17 the second emitter of which is connected to a data input end B. An output data Q is equal to an input data A/B when a control data S is high/low level respectively.

REFERENCES:
patent: 3973141 (1976-08-01), Goldthorp
patent: 4119997 (1978-10-01), Fulkerson
patent: 5281872 (1994-01-01), Mori

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