Amplitude insensitive voltage-to-current converter and method fo

Details Amplitude insensitive voltage-to-current converter and method fo Amplitude insensitive voltage-to-current converter and method fo

1977-11-21

1979-03-20

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307 61, 307264, 323 25, G05F 156

Patent

active

041456491

ABSTRACT:
A current source is formed utilizing a reference voltage which is impressed on an impedance connected to the input of an operational amplifier. A buffer amplifier is coupled between the output and the input of the operational amplifier to prevent interaction between a high impedance signal source and a low impedance load. A constant output current appears at the output of the buffer amplifier, connected to a first electronic switch. A second electronic switch is connected to the other side of the load. A pair of signals having unstable amplitude are connected to control the first and second electronic switches. When the second electronic switch is either continuously on or alternatively on and off with the first electronic switch, the constant current is directed through the load when the first electronic switch is actuated to the off or open position, and is directed by bypass the load, when the first electronic switch is actuated to the on or closed condition.

REFERENCES:
patent: 3518457 (1970-06-01), Herrmann et al.
patent: 3704381 (1972-11-01), Nercessian
patent: 3742330 (1973-06-01), Hodges et al.
patent: 3870896 (1975-03-01), Kiko
IBM Tech Disc Bull vol. 10, No. 7 Dec. 1967 pp. 1045-1046 "Current Supply" by R. E. May, Jr.

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