Patent ID: 7746172

Claim:
A transimpedance amplifier circuit comprising: a linearized differential transimpedance amplifier comprising: an amplifier circuit having: a positive-side input, which is adapted to receive a positive-side transimpedance input signal based on a positive-side input signal; and a negative-side input, which is adapted to receive a negative-side transimpedance input signal based on a negative-side input signal; a first feedback resistor having a first input end coupled to the positive-side input and a first output end; and a second feedback resistor having a second input end coupled to the negative-side input and a second output end; a detector adapted to provide at least one detector output signal based on magnitudes of the positive-side and the negative-side input signals; and dynamic current source circuitry comprising: a first current source having a first current and coupled to the first output end, such that the first current is based on the at least one detector output signal; and a second current source having a second current and coupled to the second output end, such that the second current is based on the at least one detector output signal, wherein a magnitude of the first current is about equal to a magnitude of the second current and the linearized differential transimpedance amplifier is adapted to provide positive-side and negative-side transimpedance output signals based on amplifying a difference between the positive-side and the negative side transimpedance input signals.