Hysteresis comparator circuit for use with a voltage regulating

Details Hysteresis comparator circuit for use with a voltage regulating Hysteresis comparator circuit for use with a voltage regulating

1996-11-15

1998-04-14

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327205, H03K 5153, H03K 3037

Patent

active

057397058

ABSTRACT:
A hysteresis comparator circuit using, for a virtually power-free detection of the voltage value to be subjected to a comparison, a differential stage utilizing on one end load transistors and on the other hand a negative feedback stage and preferably a current mirror stage. The control electrode of one load transistor is fed with the voltage to be used for the comparison. The control electrode of the other load transistor is fed with a reference voltage on the basis of which this load transistor forms a constant load impedance. The second load transistor has a third load transistor connected in parallel thereto, which in response to the output signal of the comparator is either conducting or blocking, so that in accordance with the output signal of the comparator, an additional load impedance is connected in parallel to the impedance of the second load transistor or no such connection is made.

REFERENCES:
patent: 4259601 (1981-03-01), Stein
patent: 4375598 (1983-03-01), Sakai
patent: 4602169 (1986-07-01), Shimizu
patent: 5262682 (1993-11-01), Mitsuya et al.
patent: 5640118 (1997-06-01), Drouot
"Fast Mostek ROM has 350-ns access," Electronics, Sep. 16, 1997, pp. 42 and 44.

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