Patent ID: 6621259
Filing Date: 2003-09-16
Classification: G01R

Abstract:
A current sense amplifier for measuring a current flowing through a sense resistor coupled between first and second input terminals, respectively, of the current sense amplifier, the current sense amplifier comprising:(a) a first amplifier having a first input coupled by a first resistor to the first terminal and a second input coupled by a second resistor to the second terminal; (b) a current source coupled to the first input of the first amplifier for causing a bias current to flow through the first resistor; (c) a feedback circuit coupled to an output of the first amplifier and the second input of the first amplifier for causing a feedback current to flow through the second resistor to equalize voltages on the first and second inputs of the first amplifier and supplying the feedback current to an output terminal of the current sense amplifier.