Patent ID: 7439480
Filing Date: 2008-10-21
Classification: G05F,H01L

Abstract:
1. A current mirror that substantially reduces noise at a node of the current mirror, the current mirror comprising: a first mirror circuit that includes a transistor, wherein the first mirror circuit delivers a first current to a load through a node that connects the first mirror circuit with the load; an amplifier having an output connected with a gate terminal of the transistor of the first current mirror, the amplifier having a first input connected to a reference voltage and a second input connected to a drain terminal of the transistor of the first current mirror, wherein a source terminal of the transistor of the first current mirror is configured to be connected to a power source; and a feedback loop that connects the node to the second input of the amplifier, wherein the feedback loop causes the amplifier to adjust a voltage of the gate terminal such that a voltage at the node is substantially unchanged in response to noise.