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:
Nov. 16, 2010
Filed:
Aug. 04, 2009
Masahiko Inamori, Osaka, JP;
Kazuki Tateoka, Kyoto, JP;
Hirokazu Makihara, Osaka, JP;
Shingo Matsuda, Kyoto, JP;
Junji Kaido, Osaka, JP;
Masahiko Inamori, Osaka, JP;
Kazuki Tateoka, Kyoto, JP;
Hirokazu Makihara, Osaka, JP;
Shingo Matsuda, Kyoto, JP;
Junji Kaido, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A radio frequency signal is input to the bases of transistors via respective capacitors, is amplified, and is output from the collectors of the transistors. The emitter of each transistor is grounded. A bias current input from a bias circuit is supplied to the bases of the transistors via respective resistors both during low-output operation and during high-output operation. The collectors of the transistors are connected via an impedance circuit to a bias voltage input terminal. Therefore, during high-output operation, a direct current offset voltage is generated by the impedance circuit based on a portion of a radio frequency signal output from the collectors, thereby further increasing the bias current.