Patent ID: 6946882

Claim:
A current sense amplifier, comprising: a voltage comparator having a first input, a second input and an output; a first clamping device coupled between the first input of the voltage comparator and a first input signal, the first clamping device being coupled to a reference voltage; a second clamping device coupled between the second input of the voltage comparator and a second input signal, the second clamping device being coupled to the reference voltage; and a configurable load device coupled between the first and second input of the voltage comparator, wherein the configurable load device comprises a configurable current mirror, which comprises: a first transistor coupled between a voltage source and the first clamping device; a second transistor coupled between the voltage source and the second clamping device, the first and second transistor gates being coupled together; a first switching transistor coupled between the first transistor gate and drain; and a second switching transistor coupled between the second transistor gate and drain, wherein either the first transistor or second transistor may be used as a transistor diode or a current source.