Circuit for introducing hysterisis

Details Circuit for introducing hysterisis Circuit for introducing hysterisis

1993-02-03

1994-08-02

Callahan, Timothy P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307359, 307585, H03K 3295, H03K 5158

Patent

active

053348834

ABSTRACT:
A novel driver circuit and feedback loop is provided that improves the response time of the driver circuit and produces threshold voltages and hysteresis levels which are substantially independent of the supply voltage. The feedback circuit uses a pair of transistors connected in a cascode configuration to provide positive feedback from the output of the driver circuit and to control this feedback by means of the signal at the driver circuit input. By coupling the input voltages to the gate of a cascode transistor, the response time of the driver circuit is improved without disturbing its high input impedance. In addition, by replacing a transistor in the driver circuit input buffer with a current source, the threshold voltage of the driver circuit can be made substantially independent of the supply voltage.

REFERENCES:
patent: 4506168 (1985-03-01), Uya
patent: 4539489 (1985-09-01), Vaughn
patent: 4603264 (1986-07-01), Nakano
patent: 4703201 (1987-10-01), McGrail
patent: 4786825 (1988-11-01), O'Shaughnessy et al.
patent: 5034623 (1991-07-01), McAdams
patent: 5115434 (1992-05-01), Aizaki

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