Patent ID: 6476667
Filing Date: 2002-11-05
Classification: G01R,H02H

Abstract:
An adjustable current limiting/sensing circuit comprising:an output circuit operable to generate a variable output current, said output circuit responsive to a first input signal; a first input circuit connected to said output circuit and operable to generate a sense current, said first input circuit responsive to said first input signal; a second input transistor connected to said first input circuit and operable to generate a sensing voltage proportional to said sense current, said second input transistor responsive to a second input signal; and a third input transistor having an emitter of the third input transistor directly connected to a source/drain of said second input transistor, a collector of the third input transistor directly connected to an input of said first input circuit, and an input of said output circuit, said third input transistor being operable to switch responsive to said sensing voltage applied to an input of the third input transistor and thereby vary the variable output current of said output circuit responsive to said second input signal.