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. 22, 2008
Filed:
Jan. 19, 2006
Jung-chang Liu, Taipei, TW;
Che-hung Liao, Taipei, TW;
Sen-you Liu, Taipei, TW;
Did-min Shih, Milpitas, CA (US);
Jung-Chang Liu, Taipei, TW;
Che-Hung Liao, Taipei, TW;
Sen-You Liu, Taipei, TW;
Did-Min Shih, Milpitas, CA (US);
Via Technologies Inc., Taipei, TW;
Abstract
A power amplifier circuit amplifying an input signal to an output signal and a method thereof. The power amplifier circuit comprises a ramp controller, a current source, and a first amplification stage. The ramp controller receives an enable signal to generate a ramp signal. The current source is coupled to the ramp controller, produces a ramp current by the ramp signal. The first amplification stage is coupled to the current source, comprises a first supply voltage input coupled to a fixed supply voltage, and is biased by the ramp current to amplify the input signal such that an envelope of the output signal is a ramp.