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:
Aug. 10, 2010
Filed:
May. 12, 2009
Po-chiang Wu, Hsinchu County, TW;
Chia-liang Chiang, Taipei Hsien, TW;
Sheng-nan Chiu, Hsinchu, TW;
Chung-ting Yang, Taoyuan County, TW;
Ying-chuan Peng, Hsinchu County, TW;
Po-Chiang Wu, Hsinchu County, TW;
Chia-Liang Chiang, Taipei Hsien, TW;
Sheng-Nan Chiu, Hsinchu, TW;
Chung-Ting Yang, Taoyuan County, TW;
Ying-Chuan Peng, Hsinchu County, TW;
Realtek Semiconductor Corp., Science Park, HsinChu, TW;
Abstract
A test circuit, for checking whether at least one programmable gain amplifier (PGA) operates correctly, includes a signal generator, a gain controller, a test level output circuit, a comparison circuit and an identifying circuit. The signal generator is utilized for outputting a test input signal to a PGA to generate a test output signal. The gain controller is utilized for outputting a gain control signal to the PGA to adjust a gain of the PGA. The test level output circuit is utilized for referring to the test output signal to output a first test level and a second test level. The comparison circuit is utilized for comparing the first and second test levels to generate a result signal. The identifying circuit is utilized for identifying whether the PGA operates correctly according to the result signal.