Electrical circuits

Details Electrical circuits Electrical circuits

1978-01-09

1980-01-22

Anagnos, Larry N.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307353, 307359, 330253, 330257, H03K 518, H03F 345

Patent

active

041852117

ABSTRACT:
A differential-input differential-output transconductance amplifier is connected so the potential applied to a first of its input terminals, its envelope, or portions of its envelope, is followed by the potential at the second of its input terminals, either continuously or at selected times. To this end the balanced variations in the output currents of the transconductance amplifier are converted to a single-ended signal applied to the input electrode of transistor means, the output electrode of which is connected to the second input terminal of the transconductance amplifier for completing a direct-coupled feedback loop. Modifications of the basic circuit provide potential followers, voltage amplifiers, peak detectors, envelope detectors, and sample-and-hold circuits.

REFERENCES:
patent: 3435365 (1969-03-01), Greeson, Jr.
patent: 3469112 (1969-09-01), Hands et al.
patent: 3609397 (1971-09-01), Zaman
patent: 3651342 (1972-03-01), Dingwall
patent: 3702942 (1972-11-01), Aguirre
patent: 3857047 (1974-12-01), Knight
patent: 3898576 (1975-08-01), Fukaya
patent: 3904988 (1975-09-01), Hsiao
patent: 4055774 (1977-10-01), Ahmed
patent: 4068184 (1978-01-01), Ahmed
Yang et al., "Peak Voltage Detector", IBM Tech. Discl. Bull., vol. 6, No. 4, pp. 114-115, 9/1963.
Ahmed, "Zero-Offset Potential Follower Circuits", RCA Technical Notes (pub.), TN No. 938, 7 pp. Sep. 17, 1963.

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