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:
Jun. 26, 2018
Filed:
Feb. 05, 2017
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Masato Nishimori, Atsugi, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A power amplification apparatus which is a Doherty power amplification apparatus includes a main amplifier configured to amplify an input signal, and an auxiliary amplifier configured to amplify the input signal when a level of the input signal is higher than a predetermined level. The power amplification apparatus includes an auxiliary amplifier threshold value shift detector configured to detect a threshold value shift in the auxiliary amplifier; and an auxiliary amplifier bias voltage adjustment circuit configured to adjust a bias voltage of the auxiliary amplifier based on the detected threshold value shift in the auxiliary amplifier.