Voltage controlled current source

Details Voltage controlled current source Voltage controlled current source

1982-04-22

1984-05-29

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323280, 323354, 330 86, G05F 308

Patent

active

044517793

ABSTRACT:
A voltage controlled current source provides a load current through a load impedance which is a function of an input voltage and is independent of the impedance value of the load impedance. The voltage controlled current source includes a high input impedance unity gain instrumentation amplifier and a resistor connected in series with the load impedance so that current flows through the resistor and the load impedance. The instrumentation amplifier receives the input voltage at its inverting input and receives a load voltage representing the voltage across the load impedance produced by the load current at its noninverting input. The instrumentation amplifier subtracts the input voltage at the inverting input from the load voltage at the noninverting input and multiplies by a gain of one to produce an output voltage at its output. The resistor and the load impedance are connected in series between the output of the amplifier and a reference voltage (e.g. ground), so that the load current is equal to the input voltage divided by the resistance value of the resistor.

REFERENCES:
patent: 3546564 (1970-12-01), Denny
patent: 4091333 (1978-05-01), Thrap
patent: 4349777 (1982-09-01), Mitamura
Graeme et al., "Operational Amplifiers, Design and Applications", McGraw-Hill, 1971, Burr-Brown Research Corporation, pp. 201-207.

Affiliated with

Also associated with

Rating

Voltage controlled current source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage controlled current source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage controlled current source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1400167