Title:
POWER AMPLIFICATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/109862
Kind Code:
A1
Abstract:
A power amplification circuit (1) is provided with: a distortion compensation circuit (11) for implementing digital signal processing on a digital input signal (S); a frequency conversion unit (51) for converting an analog transmission signal (Xa) to a high-frequency transmission signal (Xr); and a power amplifier (52) for amplifying the power of the high-frequency transmission signal (Xr). The distortion compensation circuit (11) includes: a digital subtractor (21) that subtracts a distortion compensation signal from the digital input signal (S) and generates a digital transmission signal (X); an estimation amplifier (22) that amplifies the digital transmission signal (X); and an attenuator (23) that attenuates an output (Z) of the estimation amplifier and generates an attenuation signal, and gives that attenuation signal to the digital subtractor (21) as the distortion compensation signal.
Inventors:
ANDO NOBUHIKO (JP)
TAJIMA KENICHI (JP)
TAJIMA KENICHI (JP)
Application Number:
PCT/JP2016/087201
Publication Date:
June 21, 2018
Filing Date:
December 14, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/32; H03F3/20
Foreign References:
| JPH03270306A | 1991-12-02 | |||
| JP2004320329A | 2004-11-11 | |||
| JP2013106330A | 2013-05-30 | |||
| JP2014158230A | 2014-08-28 |
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
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