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. 01, 2008
Filed:
Feb. 24, 2006
Kyoichi Takahashi, Fujioka, JP;
Takayuki Tsutsui, Saku, JP;
Hitoshi Akamine, Maebashi, JP;
Fuminori Morisawa, Takasaki, JP;
Nobuhiro Matsudaira, Chigasaki, JP;
Kyoichi Takahashi, Fujioka, JP;
Takayuki Tsutsui, Saku, JP;
Hitoshi Akamine, Maebashi, JP;
Fuminori Morisawa, Takasaki, JP;
Nobuhiro Matsudaira, Chigasaki, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
This invention provides an electronic part for high frequency power amplification (RF power module) which will automatically perform the precharge level setting for proper output power at start of transmission without requiring the software process for precharging to run on the baseband IC, which can reduce the burden on users, namely, mobile phone manufacturers. Such electronic part configured to amplify RF transmit signals includes an output power control circuit which supplies an output power control voltage to a bias control circuit in a high frequency power amplifier circuit, based on an output power level directive signal. This electronic part is equipped with a precharge circuit which raises the output power control voltage to produce a predetermined level of output power, while detecting a current flowing through a final-stage power amplifying element, triggered by rise of a supply voltage at start of transmission.