Constant ratio current source

Details Constant ratio current source Constant ratio current source

2006-08-17

2008-08-19

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C330S252000

Reexamination Certificate

active

07414456

ABSTRACT:
A constant ratio current source comprises a first current branch which includes a first transistor that conducts a current I1from a first current input to a first node and a resistor R1connected between the first node and a circuit common point, and a second current branch which includes a second transistor that conducts a current I2from a second current input to a second node and a resistor R2connected between the second node and the circuit common point. The current branches are arranged such that I2varies with I1. A linear negative resistance circuit connected between the first and second nodes provides an apparent negative resistance that increases the differential output impedance at the first and second current inputs, such that the ratio of I2:I1is maintained approximately constant for a varying differential voltage applied across the first and second current inputs.

REFERENCES:
patent: 4769617 (1988-09-01), Mizuide
patent: 4904952 (1990-02-01), Tanimoto
patent: 5587689 (1996-12-01), Bowers
patent: 6229394 (2001-05-01), Harvey
patent: 6667654 (2003-12-01), Behzad et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4014177