Patent ID: 7929241

Claim:
A signal conversion circuit, comprising: an input circuit configured to receive a differential input signal and shift a first bias of the differential input signal to produce a single ended intermediate signal with a second bias, where the input circuit rejects common mode inputs; and an amplifier circuit, coupled with the input circuit, the amplifier circuit configured to amplify the single ended intermediate signal to produce an amplified signal; where the input circuit includes: a first transistor and a second transistor, where drains of the first transistor and the second transistor are configured to couple with a supply voltage, and gates of the first transistor and the second transistor are configured to receive the differential input signal; a first resistor coupled to a source of the first transistor and a drain of a third transistor; and a second resistor coupled to a source of the second transistor and a drain of a fourth transistor; where the third transistor and the fourth transistor are connected in a current-mirror configuration.