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:
Aug. 18, 2009
Filed:
Dec. 18, 2007
Shigeki Nakamura, Osaka, JP;
Junji Ito, Osaka, JP;
Shigeki Nakamura, Osaka, JP;
Junji Ito, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides a power amplifier that includes the following: an RF operation transistorhaving a base to which an RF signals is inputted, an emitter connected to the ground, and a collector connected to a power supply and a terminal for outputting an RF signal; a current reference transistorhaving a collector connected to a reference current source, an emitter connected to the ground, and a base connected to the base of the RF operation transistor, an operational amplifierformed of CMOS having one input connected to the collector of the current reference transistor and the other input connected to the base of the RF operation transistor; and a voltage-to-current conversion transistorfor converting the output of the operational amplifierinto a current to be supplied to the base of the RF operation transistor. The power amplifier has low power consumption and an efficient use of chip area, and a current variation due to the relative variation in hcan be prevented, so as to be driven with a low power supply voltage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile