Patent ID: 6956727
Filing Date: 2005-10-18
Classification: G01R

Abstract:
1. A high side current monitor circuit, comprising: a high side terminal; a load side terminal; a current sensing element connected between said high and load side terminals which carries a current of interest I an operational amplifier, said amplifier's non-inverting input coupled to said load side terminal; a first resistor connected between said high side terminal and said amplifier's inverting input; a first transistor having a control input and a current circuit, said control input connected to the output of said amplifier and said current circuit connected between said inverting input and a current output node such that said first transistor conducts an output current I an output load resistor connected between a second node and said ground terminal; and a second transistor coupled between said current output node and said second node and connected to conduct said output current to said load resistor such that a voltage proportional to I