Patent ID: 7205830
Filing Date: 2007-04-17
Classification: G05F

Abstract:
1. A current mirror circuit, comprising: a first field effect transistor (FET) having a first gate and a first drain, said first drain conductively connected to a current source for conducting a first current; at least one second FET having a second gate conductively connected to said first gate, said second FET operable to output a second current in proportion to said first current; and a switching element having a first conductive terminal connected to said first gate and to said second gate, a second conductive terminal connected to said first drain and a control terminal for receiving a control input, such that (a) when the control input has a first state, said switching element is operated in an “on” state to conduct current between said first and second conductive terminals, and (b) when the control input has a second state, said switching element is operated in an “off” state not conducting current between said first and second conductive terminals; and a switching network operable to provide the control input to said switching element and controllably switch said first and second FETs between a powered on state in which said switching element is in the on state and the first and second currents are conducted and a powered off state in which said switching element is in the off state and the first and second currents are not conducted.