Title:
レーザダイオード駆動回路
Document Type and Number:
Japanese Patent JP4788547
Kind Code:
B2
Abstract:
The present invention provides a laser diode driving circuit that enables to precisely control the amplitude of the driving current with suppressing the overshoot and the undershoot appeared in the monitor signal of the optical output from the laser diode. The driving circuit of the invention includes a signal mixer, a comparator, an averaging unit and a current generator. The signal mixer superposes an additional signal on the monitor signal. The amplitude of the additional signal varies in accordance with a preset distribution function. The comparator compares thus superposed signal with a reference level and outputs a binary signal. The averaging unit integrates this binary signal and the current generator provides the driving current based on the averaged binary signal.
Inventors:
Hayashi Shigeo
Application Number:
JP2006261041A
Publication Date:
October 05, 2011
Filing Date:
September 26, 2006
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
H01S5/0683
Domestic Patent References:
| JP7240555A | ||||
| JP1051060A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Shiro Terasaki
Masatoshi Shibata
Shiro Terasaki
Masatoshi Shibata