Patent ID: 6778571
Filing Date: 2004-08-17
Classification: H01S

Abstract:
A laser driver circuit, comprising:two transistors, each having emitter, collector and base electrodes, the respective base electrodes being coupled to respective differential input terminals for receiving a differential input data signal, the respective collector electrodes being coupled to a first power supply rail and the respective emitter electrodes being coupled to a pair of respective differential output terminals for coupling to a pair of respective input terminals of a laser, each emitter electrode being coupled to the respective output terminal via a respective impedance, each emitter electrode further being coupled to a respective current source, each current source being controllable, each current source being coupled to a second power supply rail, each one of the impedances being coupled to the second power supply rail, each emitter electrode being coupled to the respective output terminal via a respective capacitance, each respective capacitance being coupled in series with a respective impedance, and each capacitance being coupled to a respective first or second power supply rail via an inductor.