Title:
ΔΣ MODULATOR, TRANSMITTER, SEMICONDUCTOR INTEGRATED CIRCUIT, DISTORTION COMPENSATION METHOD, SYSTEM, AND COMPUTER PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/230112
Kind Code:
A1
Abstract:
This ΔΣ modulator is provided with a first adder that adds a plurality of RF signals of different frequencies, a loop filter, a second adder, a quantizer, a difference unit, and a distortion compensator. The loop filter has pass bands at the respective frequencies of the plurality of RF signals, and includes a plurality of filter circuits. The distortion compensator is provided with a signal addition unit that adds a compensation signal to the input of the filter circuit.
Inventors:
MAEHATA TAKASHI (JP)
Application Number:
PCT/JP2018/014414
Publication Date:
December 20, 2018
Filing Date:
April 04, 2018
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H03M3/02; H03M7/32
Domestic Patent References:
| WO2016103981A1 | 2016-06-30 |
Foreign References:
| JP2009530875A | 2009-08-27 |
Other References:
TAKASHI MAEHATA ET AL.: "Concurrent Dual-band 1-bit Digital Transmitter Using Band-Pass Delta-Sigma Modulator", PROCEEDINGS OF THE 8TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE, October 2013 (2013-10-01), pages 552 - 555, XP032533950
JIQIN HE ET AL.: "Dual-band Transmitters Based on Lowpass and Bandpass Delta-Sigma Modulators, Microwave and Millimeter Wave Technology(ICMMT", 2016 IEEE INTERNATIONAL CONFERENCE ON, June 2016 (2016-06-01), pages 590 - 592
JIQIN HE ET AL.: "Dual-band Transmitters Based on Lowpass and Bandpass Delta-Sigma Modulators, Microwave and Millimeter Wave Technology(ICMMT", 2016 IEEE INTERNATIONAL CONFERENCE ON, June 2016 (2016-06-01), pages 590 - 592
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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