Hysteresis circuit used in comparator

Details Hysteresis circuit used in comparator Hysteresis circuit used in comparator

2005-09-06

2005-09-06

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

C327S065000

Reexamination Certificate

active

06940329

ABSTRACT:
A hysteresis circuit for use in a comparator having a first and a second transistors as an input stage and a constant current source. The hysteresis circuit comprises a first resistor disposed between a source of the first transistor and the constant current source and a second resistor disposed between a source of the second transistor and the constant current source, and comprises a first and a second current generating means. The first current generating means supplies a current to the source of the first transistor and derives a current out from the source of the second transistor if an output signal of the comparator is a first logic value, while the second current generating means supplies a current to the source of the second transistor and derives a current out from the source of the first transistor if the output signal of the comparator is a second logic value.

REFERENCES:
patent: 5313114 (1994-05-01), Poletto et al.
patent: 2004/0160245 (2004-08-01), Brooks et al.
patent: 508567 (2002-11-01), None
English Language Abstract, Brief Description of Drawings and Independent Claims 1 and 10 of Taiwanese Pat. Pub. No. 508567.

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