Patent ID: 7492171
Filing Date: 2009-02-17
Classification: H03F

Abstract:
1. A circuit comprising: a sense element to convey current from a source to a load, the sense element having a resistance to change in response to a change in temperature of the sense element; a compensation element located proximate to the sense element, the compensation element having a resistance to change in response to the change in the temperature of the sense element; an operational amplifier having a first input coupled to the sense element, a second input coupled to the compensation element and an output wherein the operational amplifier to provide a signal on the output proportional to a voltage measured between the first input and the second input; and an output module having a first input coupled to the output of the operational amplifier, a second input coupled to the second input of the operational amplifier and an output to provide an output signal responsive to the current conveyed from the source to the load and the temperature of the sense element.