Title:
SEMICONDUCTOR LASER DRIVE CIRCUIT
Document Type and Number:
Japanese Patent JP3405518
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress the ringing of a laser diode output by respectively providing feed-forward circuits having a resonance frequency near the frequency of an input signal between the output terminals of a differential amplifier circuit, where signals appear in phase with a signal appearing at the output terminal of a level converter circuit.
SOLUTION: An amplifier 1, to which a source follower SF 2 composed of field effect transistors FETs 201, 202 and SF 2 constituted of FETs 301, 302 are connected converts other signal into specified level, among complementary signals from the amplifier 1. An FET 401 of a differential amplifier circuit 4 is connected through a feed forward circuit FF 6 which has a resonance frequency near the frequency of an input signal, and is composed of a resistor 601 and a capacitor 602, FET 402 is connected to SF 2 via FF 5 composed of a resistor 501 and a capacitor 502, and a laser diode 406 is connected to an FET 402.
Inventors:
Eiji Tsumura
Application Number:
JP1696498A
Publication Date:
May 12, 2003
Filing Date:
January 29, 1998
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
H04B10/40; H01S5/06; H01S5/062; H04B10/2507; H04B10/50; H04B10/564; H04B10/60; (IPC1-7): H01S5/062; H04B10/04; H04B10/06; H04B10/14; H04B10/26; H04B10/28
Domestic Patent References:
| JP4103183A | ||||
| JP6132591A | ||||
| JP6351708A |
Attorney, Agent or Firm:
Yoshikazu Tani (3 others)