Broadcom Corporation

Etron Technology, Inc.

Tm Technology, Inc

Jiann-Chyi Sam Shieh

Ning Li

Wei-Chuan Cheng

Chih-Yang Wang

Ren-Bang Yeh

A driving method of a laser diode includes setting a bias current, a modulation current, a first target corresponding to a predetermined average power, and a second target corresponding to a predetermined average modulation power; executing a first adjusting current step group; generating a temporary modulation current according to the modulation current; executing a second adjusting current step group; and executing the first adjusting current step group again.

Driving circuit of a laser diode and driving method of a laser diode

A dual-loop phase lock loop includes a phase frequency detector, a first charge pump, a second charge pump, a first capacitor, a filter, a first adder, a voltage controlled delay line, and a frequency divider. The phase frequency detector is used for outputting a switch signal according to a reference clock and a divided feedback clock. The first charge pump and the first capacitor are used for generating a coarse control voltage according to the switch signal. The second charge pump, the filter, and the first adder are used for generating a fine control voltage according to the switch signal and the coarse control voltage. The voltage controlled delay line is used for outputting a feedback clock according to the coarse control voltage and the fine control voltage. The frequency divider is used for dividing the feedback clock to output the divided feedback clock.

Dual-loop phase lock loop

A wide input range amplifier includes a first and second stage. The first stage has first and second inputs, first and second outputs, and first, second and third voltage sources. The first stage accepts input signals having a first common mode voltage range and outputs a first output signal having a second common mode voltage range and being amplified a first amount. The second stage has first and second inputs connected to the first and second outputs of the first stage, respectively. The second stage accepts input signals having a common mode voltage in the second range and outputs a second output signal having a third common mode voltage range and being amplified a second amount.

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Jiann-Chyi Sam Shieh