Patent ID: 7038187

Claim:
An optoelectronic device, comprising: a photo-diode that generates a photo-current in response to an optical signal; a pre-amplifier circuit coupled to the photo-diode to detect the photo-current, the pre-amplifier circuit generating a differential output having a first signal and a second signal based on the photo-current; and a post-amplifier circuit coupled to the pre-amplifier circuit to receive the first signal and the second signal, the post-amplifier circuit comprising: a first portion coupled to receive the first signal; a second portion coupled to receive second signal; a first resistor coupled to the first portion and the second portion; a second resistor coupled to the first portion and the second portion; and wherein a current generated in response to a difference between the first signal and the second signal and flowing across the first resistor causes a corresponding current to flow across the second resistor to produce a potential difference that is representative of a difference between a maximum voltage and a minimum voltage of at least one of the first signal and second signal.