Patent ID: 7068103

Claim:
A preamplifier circuit, comprising: a differential operational amplifier, for presenting a differential signal at first and second outputs responsive to a differential signal at first and second inputs; first and second resistors, connected to the first and second inputs of the differential operational amplifier, respectively; a first output transistor, having a gate coupled to the first output of the differential operational amplifier, and having a source/drain path; a second output transistor, having a gate coupled to the second output of the differential operational amplifier, and having a source/drain path; first bias current circuitry connected in series with the source/drain path of the first output transistor; second bias current circuitry connected in series with the source/drain path of the second output transistor; a first feedback path connected between the drain of the first output transistor and the first input of the differential operational amplifier; and a second feedback path connected between the drain of the second output transistor and the second input of the differential operational amplifier.