The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1999
Filed:
Feb. 26, 1996
Yasunori Nagakubo, Kawasaki, JP;
Takashi Tsuda, Kawasaki, JP;
Tetsuo Ishizaka, Kawasaki, JP;
Shunichi Sato, Kawasaki, JP;
Saeko Yokoi, Kawasaki, JP;
Manabu Komiyama, Kawasaki, JP;
Toshio Ohya, Kawasaki, JP;
Noriaki Mizuguchi, Kawasaki, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
A Peltier control circuit detects a temperature of a device combined with a Peltier device and controls a current flowing through the Peltier device so as to keep the temperature of the device at a predetermined value. The circuit has a temperature sensing section for detecting the temperature of a device, a comparing section for comparing a temperature detection value with a predetermined temperature reference value, a limiting section for providing a comparison output with the limitation of a current flowing through the Peltier device and providing the limitation with a predetermined temperature characteristics, and a driving section for providing the Peltier device with an input or output driving current in accordance with the comparison output via the limiting section.