Coherent light generators – Particular temperature control
Reexamination Certificate
2006-04-18
2006-04-18
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular temperature control
C374S141000
Reexamination Certificate
active
07031356
ABSTRACT:
Disclosed is a temperature controller and method for maintaining an optical-communication device at a constant temperature regardless of ambient temperature variation. The temperature controller includes: a temperature sensor for detecting the current temperature of a device which is to be temperature-controlled; and, a temperature-comparison section for comparing the current temperature detected by the temperature sensor with the predetermined temperature that is a proper operating temperature for the device, wherein the temperature-comparison section further includes: a differential amplifier for outputting the difference between signals which are inputted respectively into anode and cathode terminals; and first, second, third, and fourth resistance pads which are selectively short-circuited with one another according to the temperature-sensor type so as to vary the polarity of the signals inputted into the differential amplifier so that PTC and NTC sensors can be used at the same time in a single PCB regardless of the temperature-sensor type.
REFERENCES:
patent: 4739467 (1988-04-01), Furusawa
patent: 6798341 (2004-09-01), Eckel et al.
patent: 0703679 (1996-03-01), None
patent: 2288279 (1974-10-01), None
Kim Chan-Youl
Lee Jong-Hun
Park Tae-Sung
Sohn Sung-Il
Cha & Reiter LLC
Harvey Minsun Oh
Roy Tod T. Van
Samsung Electronics Co Ltd
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