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Title:
DIGITAL POWER AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2018/176190
Kind Code:
A1
Abstract:
The present application relates to the field of power amplifiers. Disclosed is a digital power amplifier. The digital power amplifier comprises a first DSM, a second DSM, a first PWM, a second PWM, a low-pass filter, a digital up-converter, a comb filter, and a power amplifier. The first PWM is coupled to the first DSM, and is used for modulating a first DSM signal inputted by the first DSM and outputting a first PWM signal. The second PWM is coupled to the second DSM, and is used for modulating a second DSM signal inputted by the second DSM and outputting a second PWM signal. The low-pass filter is separately coupled to the first PWM and the second PWM. The digital up-converter is coupled to the low-pass filter, and is used for modulating the first PWM signal on which low-pass filtering has been performed and the second PWM signal on which low-pass filtering has been performed, and outputting a third PWM signal of a preset radio frequency. The comb filter is coupled to the digital up-converter, and is used for suppressing a PWM harmonic wave of a third PWM signal. The power amplifier is coupled to the comb filter, and is used for performing power amplification processing on the third PWM signal on which harmonic suppression has been performed.

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Inventors:
HUANG WEI (CN)
SUN YIJUN (CN)
Application Number:
PCT/CN2017/078267
Publication Date:
October 04, 2018
Filing Date:
March 27, 2017
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03F1/32
Foreign References:
CN201332385Y2009-10-21
CN106160677A2016-11-23
CN101262240A2008-09-10
Other References:
PENG ET AL.: "Implementation of Digital Audio Power Amplifier Based on PWM and Sigma-Delta Modulation", 15 December 2015 (2015-12-15), ISSN: 1674-4888
Attorney, Agent or Firm:
BEIJING SAN GAO YONG XIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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