Patent ID: 8831059
Filing Date: 2014-09-09
Classification: H01S,H04B

Abstract:
1. A laser diode driver circuit comprising: a laser diode that converts a current signal into an optical signal; a bias-current drive circuit that supplies a bias current to the laser diode; a modulation-current drive circuit that supplies a modulation current to the laser diode; a first inductance connected between the anode of the laser diode and a positive power source; a second inductance connected between the cathode of the laser diode and a negative-phase output terminal of the bias-current drive circuit; a first resistor with one end connected to a connection point of the anode of the laser diode and the first inductance and the other end connected to a negative-phase output terminal of the modulation-current drive circuit; and a second resistor including one end connected to a connection point of the cathode of the laser diode and the second inductance and the other end connected to a positive-phase output terminal of the modulation-current drive circuit, wherein a positive-phase output terminal of the bias-current drive circuit is connected to the connection point of the anode of the laser diode and the first inductance.