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:
Feb. 24, 2009
Filed:
Jul. 18, 2006
Kuen-shan Chang, Hsinchu, TW;
Uei-shan Uang, Shalu Township, Taichung County, TW;
Mei-show Chen, Hsinchu, TW;
Chia-ming Hong, Hsinchu, TW;
Kuen-Shan Chang, Hsinchu, TW;
Uei-Shan Uang, Shalu Township, Taichung County, TW;
Mei-Show Chen, Hsinchu, TW;
Chia-Ming Hong, Hsinchu, TW;
Faraday Technology Corp., Hsinchu, TW;
Abstract
A low supply voltage band-gap reference circuit is provided, which includes a positive temperature coefficient current generation unit and a negative temperature coefficient current generation unit, and it is implemented by way of current summing. Through the current-mode temperature compensation technique, the present invention is able to reduce the voltage headroom and the number of operational amplifiers required by the conventional voltage-summing method, as well as the influence to the output voltage due to the offset voltage, thereby providing a stable and low voltage band-gap reference voltage level. In addition, by reducing the number of operational amplifiers and resistors of high resistance, the circuit area is reduced, and chip cost is saved.