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:
Dec. 29, 2009
Filed:
Dec. 11, 2006
Che-hung Liao, Taipei, TW;
Jung-chang Liu, Taipei County, TW;
Ying-che Tseng, Taipei, TW;
Did-min Shih, Milpitas, CA (US);
Che-Hung Liao, Taipei, TW;
Jung-Chang Liu, Taipei County, TW;
Ying-Che Tseng, Taipei, TW;
Did-Min Shih, Milpitas, CA (US);
Via Technologies, Inc., Taipei, TW;
Abstract
A power amplifier amplifying an input signal is provided, comprising a power amplifier circuit, a bias circuit, and a compensation circuit. The power amplifier circuit has an input impedance responsive to the input signal, and amplifies the input signal to generate an output signal. The bias circuit is coupled to the power amplifier circuit, generates a DC bias signal to the power amplifier so that the power amplifier amplifies the input signal. The compensation circuit is coupled to the power amplifier circuit, provides a compensation impedance responsive to the input signal such that a combination of the input impedance and the compensation impedance is substantially constant regardless of the input signal.