Switching circuit with hysteresis

Details Switching circuit with hysteresis Switching circuit with hysteresis

1986-07-28

1987-06-30

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307290, 307359, 307362, H03K 5153, H03K 524

Patent

active

046773150

ABSTRACT:
A circuit switches with a hysteresis defined by separately controllable thresholds which can be made largely independent of temperature and fabrication conditions. The circuit contains a pair of differential portions (21 and 22) and an arithmetic component (24). The hysteresis is introduced into the circuit by using positive feedback to control the position of a switch (23) in such a manner as to change the transconductance of the circuit as it is switching.

REFERENCES:
patent: 3668538 (1972-06-01), Hearn
patent: 3725673 (1973-04-01), Frederiksen et al.
patent: 4069431 (1978-01-01), Kucharewski
patent: 4406955 (1983-09-01), Lo Cascio
patent: 4587444 (1986-05-01), Emori et al.

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