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. 27, 2008
Filed:
Nov. 14, 2005
Chao-cheng Lee, Hsin Chu, TW;
Tzung-ming Chen, Taipei, TW;
Chao-Cheng Lee, Hsin Chu, TW;
Tzung-Ming Chen, Taipei, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
A circuit apparatus having compensation circuits for unequal input/output common mode voltages is presented. The apparatus includes a circuit unit, a feedback path and a current source. The circuit unit has at least an input terminal for receiving an input signal and at least an output terminal for generating an output signal. The input terminal configured to provide an input common mode voltage and the output terminal configured to provide an output common mode voltage. The feedback path couples the output terminal and the input terminal. The current source is coupled to the input terminal to supply a current. The voltage drop generated at the feedback path compensates the difference between the input common mode voltage and the output common mode voltage.