Patent ID: 9584226
Date: 2017-02-28
CPC Classifications: H03F,H04B

Claim:
1. The optical receiver comprising: a photodiode coupled to the input of a trans-impedance amplifier such that the trans-impedance amplifier receives the current of the photodiode; a first comparator adapted to compare an output voltage of the trans-impedance amplifier with a threshold voltage; and a threshold control block for generating the threshold voltage, wherein the threshold controls block comprises: a first capacitor coupled to a first node, the first node being coupled by a first switch to the output of the trans-impedance amplifier; a second capacitor coupled to a second node, the second node being coupled by a second switch to the output of the trans-impedance amplifier, wherein a third switch is coupled between the first and second nodes; and a control circuit configured to control the first, second and third switches.