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. 26, 2005
Filed:
Feb. 21, 2003
Takayuki Tsutsui, Saku, JP;
Hiroyuki Nagamori, Komoro, JP;
Kouichi Matsushita, Komoro, JP;
Nobuhiro Matsudaira, Chigasaki, JP;
Takayuki Tsutsui, Saku, JP;
Hiroyuki Nagamori, Komoro, JP;
Kouichi Matsushita, Komoro, JP;
Nobuhiro Matsudaira, Chigasaki, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
The present invention provides a high frequency amplifier using a power supply voltage regulate circuit for the purpose of compensating for variations in power supply voltage. The high frequency amplifier comprises three-stage power amplifiers which amplify an input signal and output the amplified signal, a bias circuit which supplies bias voltages for controlling these power amplifiers, a regulate circuit which compensates for variations in noise or gain with respect to the variations in the power supply voltage for driving the power amplifiers, etc. The regulate circuit holds constant an output voltage Vddc with respect to variations in power supply voltage Vdd and outputs the constant-held output voltage Vddc as a power supply voltage for the power amplifiers.