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:
May. 12, 2009
Filed:
Sep. 06, 2007
Hyung-seuk Kim, Yangcheong-gu, KR;
Hyung-seuk Kim, Yangcheong-gu, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A temperature sensing circuit includes first, second and third proportional to absolute temperature (PTAT) units, and first and second subtracters. The first PTAT unit generates a first output voltage based on a reference current and a current of N times the reference current, where N is an emitter current density ratio. The second PTAT unit generates a second output voltage based on a current of twice the reference current and a current of 2N times the reference current. The third PTAT unit generates a third output voltage based on the reference current and a current of N times the reference current. The first subtracter performs subtraction on the second output voltage and the third output voltage, and the second subtracter performs subtraction on an output voltage of the first subtracter and the first output voltage.