Other

Vitesse Semiconductor Corporation

Adam Wu

Balagopal Mayampurath

Matthew Lee Banowetz

Lawrence J Choi

Kinana Hussain

Qinggang Zeng

Systems and methods for load detection on serial communication data lines are provided herein. In certain configurations, a serial communication system includes a data line having a load capacitance and a master device configured to generate a command signal for a slave device to measure the load capacitance on the data line. The system further includes a slave device including a load detector including a controller configured to receive the command signal from the master device, provide a first fixed current to the data line, determine an amount of time elapsed while the data line is driven to a first threshold value, and determine the load capacitance of the data line based on the amount of time elapsed.

Systems and methods for load detection on serial communication data lines

An automatic power control circuit for a laser driver includes precharge circuitry to precharge inputs to a comparator receiving an indication of laser output power, for example from a monitor photodiode. The precharge circuitry can be selectively activated when a laser driven by the laser driver is operating in burst mode, as opposed to operating in continuous mode. In addition, a digital up-down counter may be used to increase or decrease a digital value used to set a bias level for the laser, with the digital up-down counter counting up if the comparator indicates the laser output is too low and counting down if the comparator indicates the laser output is too high.

Digital automatic power control loop for continuous and burst mode applications

A Loss Of Signal (LOS) circuit in an opto-electronic receiver circuit. The LOS circuit includes a current to voltage converter and a comparator circuit. The current to voltage circuit receives a current signal including a DC current signal component from a photodetector circuit included in the opto-electronic receiver. The current to voltage receiver generates a voltage signal in response to the DC current signal. The comparator circuit receives the voltage signal from the current to voltage circuit and generates a LOS signal from the voltage signal by comparing the voltage signal to a reference voltage signal.

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Thousand Oaks, CA, United States of America

Adam Wu