Compensated current sensing circuit

Details Compensated current sensing circuit Compensated current sensing circuit

1988-07-27

1989-04-11

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323312, 330257, 330277, G05F 324

Patent

active

048209686

ABSTRACT:
A current sensing circuit includes a first reference resistor connected in series with the source-drain path of a current mirroring transistor across the source-drain path of a power transistor which is N times the size of the current mirroring transistor. Due to the first reference resistor, the current in the mirroring transistor is less than l/N the current in the power transistor. To sense the current in the power transistor more accurately, the current sensing circuitry includes a reference circuit in which the source-drain path of a compensating transistor, of like size as the current mirroring transistor, is connected in parallel with a second reference resistor to produce a reference current which is approximately equal to l/N the current flowing in the power transistor.

REFERENCES:
patent: 4251743 (1981-02-01), Hareyama
patent: 4283673 (1981-08-01), Lieux
patent: 4553084 (1985-11-01), Wrathall
patent: 4769619 (1988-09-01), Taylor

Affiliated with

Also associated with

Rating

Compensated current sensing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-669149