Absolute value circuit

Details Absolute value circuit Absolute value circuit

1993-08-26

1995-02-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Absolute value

327104, H03K 500

Patent

active

053941071

ABSTRACT:
An absolute value circuit for analog type processing combines an analog inverter circuit and a maximum circuit. The inverter circuit uses an operational amplifier comprised of CMOS inverters which are connected in a cascade with a gain of 1. The maximum circuit includes a pair of nMOS transistors, the source follower outputs of which are connected to a common output.

REFERENCES:
patent: 3509372 (1970-04-01), Bicking
patent: 3564430 (1970-10-01), Brudevold
patent: 4446444 (1984-05-01), Patterson, III
patent: 4571502 (1986-02-01), Kimura et al.
patent: 4704545 (1987-11-01), Tanaka et al.
patent: 5012139 (1991-04-01), Susak et al.
Rikoski et al., "Micropower Complementary-MOS d.c. Amplifier", International Journal of Electronics, vol. 40, No. 3, 1976, pp. 237-240.
Patent Abstracts of Japan, vol. 010, No. 209, Jul. 1986, JP-A-61 050 408.

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