Patent ID: 9276680
Filing Date: 2016-03-01
CPC Classification: H04B

Claim Text:
1. A laser driver assembly comprising: a laser driver; and a sampling loop configured to facilitate sampling of photodiode current produced by a monitor photodiode (MPD) of an optical transmitter assembly, the sampling loop comprising: a low pass filter configured to receive transmit (Tx) data provided to the laser driver and to generate an attenuated output waveform corresponding to an input waveform defined by a number of consecutive bits of a first type received in the transmit (Tx) data, the low pass filter configured to reset the output waveform when a bit of a second type is received; a digital-to-analog converter (DAC) configured to output a threshold signal; and a comparator configured to compare the output waveform from the low pass filter and the threshold signal, and to output a signal indicating when the photodiode current is to be sampled.