Title:
NEGATIVE-FEEDBACK BASED POWER AMPLIFIER STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2016/172913
Kind Code:
A1
Abstract:
Disclosed in the present invention is a negative-feedback based power amplifier structure. In the power-amplifier structure, an output signal envelope detector, an attenuator and an envelope amplifier sequentially connected are added between an output end and a power supply end of a power amplifier, such that the power amplifier, the output signal envelope detector, the attenuator and the envelope amplifier form a feedback loop. By comparing the envelope of a radio frequency input signal of the power amplifier and the envelope of a radio frequency output signal of the power amplifier, the envelope amplifier dynamically adjusts the power supply voltage of the power amplifier, such that a constant gain of the power amplifier can be realized, and the efficiency of outputting a modulated signal is greatly improved for the power amplifier.
Inventors:
LIU YU (CN)
XIAO YANBIN (CN)
LI ZHIQIANG (CN)
ZHANG HAIYING (CN)
XIAO YANBIN (CN)
LI ZHIQIANG (CN)
ZHANG HAIYING (CN)
Application Number:
PCT/CN2015/077935
Publication Date:
November 03, 2016
Filing Date:
April 30, 2015
Export Citation:
Assignee:
INST OF MICROELECTRONICS CAS (CN)
International Classes:
H03F1/34
Foreign References:
| CN1518793A | 2004-08-04 | |||
| CN104836536A | 2015-08-12 | |||
| CN203278749U | 2013-11-06 | |||
| US20050208907A1 | 2005-09-22 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
中科专利商标代理有限责任公司 (CN)
中科专利商标代理有限责任公司 (CN)
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