Patent ID: 7034610

Claim:
An amplifier for amplifying a current signal, comprising: a substrate; a plurality of switched current mirrors disposed on the substrate; a plurality of switching transistors, disposed on the substrate, that enable or disable the plurality of switched current mirrors; and an input network, disposed on the substrate, that includes a transistor amplifier having a positive input port, a negative input port, and an output port, a transistor having a gate, a source, and a drain, wherein the gate of the transistor is coupled to the output port of the transistor amplifier, the source of the transistor is coupled to the negative input port of the transistor amplifier and a drain of an input transistor of the plurality of switched current mirrors, and the drain of the transistor is coupled to a gate of the input transistor of the plurality of switched current mirrors, and a plurality of switched current sources, configured for coupling to the drain of the transistor, wherein the plurality of switched current sources are used to adjust a bias current in the input network.