Field effect current mode logic gate

Details Field effect current mode logic gate Field effect current mode logic gate

1981-06-26

1984-04-24

Anagnos, Larry N.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307448, H03K 19094, H03K 1920

Patent

active

044450516

ABSTRACT:
Disclosed is a field effect current mode logic gate comprised of a current source for supplying a constant current, and a differential amplifier having first and second branches for passing respective portions of the constant current. The first branch includes a plurality of parallel-coupled or serially-coupled enhancement field effect transistors having a positive threshold voltage and having respective gates for receiving respective input logic signals; and the second branch includes a depletion field effect transistor having a negative threshold voltage, and a grounded gate. The magnitudes of the current portions in the first and second branches are representative of the magnitude of the input logic signals relative to the positive threshold voltage plus the absolute value of the negative threshold voltage.

REFERENCES:
patent: 3501647 (1970-03-01), Giacomo
patent: 3619646 (1971-11-01), Vittoz
patent: 3691401 (1972-09-01), Forlani et al.
patent: 4074151 (1978-02-01), Buckley et al.
patent: 4234803 (1980-11-01), Nonaka
patent: 4239980 (1980-12-01), Takanashi et al.
patent: 4333020 (1982-06-01), Maeder
patent: 4365316 (1982-12-01), Iwahashi et al.

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