Title:
発光素子の温度制御回路
Document Type and Number:
Japanese Patent JP4433720
Kind Code:
B2
Abstract:
The present invention provides a temperature control circuit for a semiconductor light-emitting device, in which scale of the circuit is not enlarged and noise due to the current switching is not generated. In the temperature control circuit of the present invention, although the DC voltage VATC supplied to the Peltier device is generated by the DC-to-DC converting from the external power VCC, the DC voltage VATC is feedback controlled so as to coincide with a target value of the DC voltage that is set based on an error signal generated by detecting a voltage drop of the Peltier device and comparing this drop voltage with a reference voltage. A control signal for setting the temperature of the laser diode to the target temperature through heating up or cooling down the Peltier device by flowing a current corresponding to an error between the target temperature and a practical temperature detected by the thermistor in the Peltier device from the thermoelectric controller current driver.
More Like This:
| JP6232986 | Optical transmitting machine |
| JP2763980 | OPTICAL SEMICONDUCTOR MODULE |
| JP4888225 | Varistor and light emitting device |
Inventors:
Keiji Tanaka
Application Number:
JP2003286938A
Publication Date:
March 17, 2010
Filing Date:
August 05, 2003
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
H01S5/024; F25B21/04; H04B10/07; H04B10/293; H04B10/564; H04B10/572
Domestic Patent References:
| JP3125867A | ||||
| JP3240110A | ||||
| JP5204470A | ||||
| JP9023035A | ||||
| JP10209964A | ||||
| JP10335724A | ||||
| JP2000068580A | ||||
| JP2001094204A | ||||
| JP2002319730A |
Foreign References:
| US4631728 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe