| 摘要 |
In one embodiment of the invention, a switchable output current mirror with feedback is disclosed. The current mirror includes a master stage, a slave stage, and an operational amplifier that is coupled in a feedback loop with the master stage. A reference current is introduced at an input node of the current mirror. The input node is coupled to an input terminal of the operational amplifier and to a current source of the master stage. The output of the operational amplifier electrically couples to the master stage to control the current source of the master stage. The slave stage of the current mirror includes a current source that receives the output from the output terminal of the operational amplifier to control the current source. The slave stage also includes a switch for receiving a control signal and selectively coupling the current source of the slave stage with the output of the current mirror. The master stage may include a switch that is controllable by a control signal. The switch may have a plurality of outputs and each of the outputs is coupled to one of the input terminals of the operational amplifier.
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