Comparator circuit with hysteresis

Details Comparator circuit with hysteresis Comparator circuit with hysteresis

1997-05-14

1998-09-08

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 74, 327205, H03K 522, H03K 3037

Patent

active

058049940

ABSTRACT:
A comparator with hysteresis which has a bias current circuit, a differential input stage, and an output stage is disclosed. The differential input stage uses a parallel transistor and an enabling transistor connected in parallel to one of the differential pair transistors to create hysteresis. The parallel transistor and enabling transistor are used to generated an effective offset voltage which must be overcome for the comparator to switch states.

REFERENCES:
patent: 4553045 (1985-11-01), Murotani
patent: 5162671 (1992-11-01), Ishihara
patent: 5177376 (1993-01-01), Wellnitz et al.
patent: 5334883 (1994-08-01), Rosenthal

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