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:
Apr. 17, 2012
Filed:
Dec. 22, 2010
Sung-yau Yeh, Hsinchu County, TW;
Kuo-jen Hsu, Hsinchu County, TW;
Sung-Yau Yeh, Hsinchu County, TW;
Kuo-Jen Hsu, Hsinchu County, TW;
ILI Technology Corporation, Jhubei, TW;
Abstract
A differential amplifier circuit includes: P-type and N-type differential input units outputting respectively first and second outputs in response to first and second input voltages; a P-type current mirror circuit driven by the second output; an N-type current mirror circuit driven by the first output; an output unit outputting an output voltage in response to control outputs from the P-type and N-type current mirror circuits; a first sub-current source including first and second P-type transistors connected in series; and a second sub-current source including first and second N-type transistors connected in series. Control ends of the second P-type and second N-type transistors receive the control outputs from the P-type and N-type current mirror circuits, respectively. Control ends of the first P-type and first N-type transistors are coupled to a common node between the first and second P-type transistors, and a common node between the first and second N-type transistors, respectively.