Extremum voltage supply circuit with improved switching

Details Extremum voltage supply circuit with improved switching Extremum voltage supply circuit with improved switching

1995-12-18

1998-05-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327482, G01R 1900, H03K 5153

Patent

active

057572097

ABSTRACT:
The present invention relates to a circuit for supplying the extremum voltage among several input voltages, including, for each input voltage, a first bipolar transistor, the base of which receives the input voltage and the emitter of which is connected to a common output supplying the extremum voltage; a first current source for biasing the emitter of the first transistor; and switching means for disconnecting the first source from the first transistor when this transistor is blocked.

REFERENCES:
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patent: 3678513 (1972-07-01), Ward, Jr.
patent: 4716305 (1987-12-01), Sakuragi et al.
patent: 4937670 (1990-06-01), Whitledge
patent: 5159211 (1992-10-01), Fujii
patent: 5319251 (1994-06-01), Gotz
patent: 5436581 (1995-07-01), Oberhauser
patent: 5469090 (1995-11-01), Narahara
patent: 5469104 (1995-11-01), Smith et al.
Patent Abstracts of Japan, vol. 11, No, 212 (E-522), Jul. 9, 1987 & JP-A-62 034416 (Victor Co. Of Japan Ltd.) Feb. 14, 1987.
Patent Abstracts of Japan, vol. 16, No. 453 (E-1267) Sep. 21, 1992 & JP-A-04 158687 (Toshiba Corp.) Jun. 1, 1992.
IBM Technical Disclosure Bulletin, vol. 27, No. 5, Oct. 1984 New York, US, pp. 2908-2910, "Maximum and Minimum Voltage Detection".

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