Potential comparing circuit having an offset correcting circuit

Details Potential comparing circuit having an offset correcting circuit Potential comparing circuit having an offset correcting circuit

1994-09-16

1996-08-27

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 89, 327307, H03K 522, H03L 500

Patent

active

055504930

ABSTRACT:
There is provided a potential comparing circuit of which output potential is almost equal to specific determining potential levels used in a next-stage logic circuit. The potential comparing circuit has a current-mirror circuit, a first transistor, a second transistor and an offset correcting circuit. The current-mirror circuit is connected to a first power source. The first transistor has a gate to which a first input signal is supplied. The second transistor has a gate to which a second input signal is supplied, a channel type of the second transistor being the same as a channel type of the first transistor. The offset correcting circuit is provided between a drain of the first transistor and an input point of the current-mirror circuit, for correcting a potential level obtained at a drain of the first transistor to correspond to specific potential levels related to the specific determination potential levels. The output signal being output from a point between the drain of the second transistor and the output point of the current-mirror circuit.

REFERENCES:
patent: 4047059 (1977-09-01), Rosenthal
patent: 4724397 (1988-02-01), Davis
patent: 4788510 (1988-11-01), Wozniak
patent: 5115204 (1992-05-01), Tomonaga
patent: 5422529 (1995-06-01), Lee
patent: 5444413 (1995-08-01), Kimura et al.

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