Reference-regulated compensated current switch emitter-follower

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307455, 307297, 307491, H03K 19003, H03K 19086

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active

045756473

ABSTRACT:
A network composed of a plurality of compensated current switch emitter-follower logic circuits and a generator of a current source control potential for the current sources of the logic circuits in which a symmetrical relationship between UP and DOWN logic levels is maintained at all times. A logic level tracking signal which tracks changes in the UP and DOWN logic levels in the logic circuits is produced by simulating at least a portion of one of the logic circuits. The logic level tracking signal is compared with the reference potential used for the logic levels, preferably ground, by a differential amplifier. The output of the differential amplifier is buffered and suitably level shifted to produce the current source control potential. The current source control potential is applied from the single control potential generator to each of the logic circuits. The control potential is also applied to the control input of a current source portion of the simulating circuit.

REFERENCES:
patent: 3259761 (1966-07-01), Narud et al.
patent: 3522446 (1970-08-01), Kodama
patent: 3560770 (1971-02-01), Gieles
patent: 3579272 (1971-05-01), Foss
patent: 3590274 (1971-06-01), Marley
patent: 3778646 (1973-12-01), Masaki
patent: 4249091 (1981-02-01), Yamagiwa
Betts et al, "Emitter-Coupled Logic Circuit", IBM Tech. Discl. Bull.; vol. 15, No. 7, pp. 2178-2179; 12/1972.

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