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. 09, 2002
Filed:
Jul. 09, 2001
Toshikazu Nakajima, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A transmission power amplification apparatus includes a first automatic gain control section, second automatic gain control section, power amplifier, and control section. The first automatic gain control section amplifies an input signal. The second automatic gain control section amplifies an output from the first automatic gain control section. The power amplifier nonlinearly amplifies an output from the second automatic gain control section and outputs a transmission signal. The control section controls amplification of the input signal by using the synthetic gain of the first and second automatic gain control sections and the power amplifier in the transmission power range from a maximum value to an intermediate value, and controls amplification of the input signal by using only the gain of the first automatic gain control section in the transmission power range from the intermediate value to a minimum value. The second automatic gain control section has a gain characteristic that corrects nonlinearity of the power amplifier . A transmission power amplification method is also disclosed.