Title:
DESIGN METHOD FOR BANDPASS ΔΣ MODULATOR, BANDPASS ΔΣ MODULATOR, DEVICE HAVING BANDPASS ΔΣ MODULATOR, AND METHOD USING BANDPASS ΔΣ MODULATION
Document Type and Number:
WIPO Patent Application WO/2013/051641
Kind Code:
A1
Abstract:
The purpose is to provide a bandpass ΔΣ modulator for use at a desired frequency. A bandpass ΔΣ modulator is obtained by replacing z in the z region model of a low-pass ΔΣ modulator with z' below (in no event does θ0 = ±π/2×n, where n is an integer equal to 1 or greater). z' = fcnv(z, θ0) fcnv(z, θ0) is function such that, for any values of z and θ0, the absolute value of fcnv(z, θ0) is always 1. θ0 = 2π × (f0/fs), where f0 is the sampling frequency, and fs is the center frequency of the quantization noise-inhibiting band of the bandpass ΔΣ modulator.
Inventors:
MAEHATA TAKASHI (JP)
TOTANI KAZUYUKI (JP)
TOTANI KAZUYUKI (JP)
Application Number:
PCT/JP2012/075759
Publication Date:
April 11, 2013
Filing Date:
October 04, 2012
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H03M3/02
Domestic Patent References:
| WO2003030373A1 | 2003-04-10 | |||
| WO2006103921A1 | 2006-10-05 |
Foreign References:
| JP2004048703A | 2004-02-12 | |||
| JP2010187298A | 2010-08-26 | |||
| JPH07214259A | 1995-08-15 | |||
| JP2005020698A | 2005-01-20 | |||
| JP2005311472A | 2005-11-04 | |||
| JP2004088431A | 2004-03-18 | |||
| JP2012060568A | 2012-03-22 |
Other References:
MOTOI YAMAGUCHI ET AL.: "The transfer function design of bandpass Delta-Sigma modulators", 2000 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI KOEN RONBUNSHU, ELECTRONICS 2, 7 March 2000 (2000-03-07), pages 137
TAKAO WAHO ET AL.: "Understanding Delta-Sigma Data Converters", vol. 11, no. 12, 15 August 2007 (2007-08-15), pages 114 - 135
MARTIN SCHMIDT ET AL.: "Continuous-Time Bandpass Delta-Sigma Modulator for a Signal Frequency of 2.2GHz", GERMAN MICROWAVE CONFERENCE, 2009, March 2009 (2009-03-01), pages 1 - 4, XP031449729
TSAI-PI HUNG ET AL.: "Design of H-Bridge Class-D Power Amplifiers for Digital Pulse Modulation Transmitters", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 55, no. 12, December 2007 (2007-12-01), pages 2845 - 2854, XP011197404, DOI: doi:10.1109/TMTT.2007.909881
TAKAO WAHO ET AL.: "Understanding Delta-Sigma Data Converters", vol. 11, no. 12, 15 August 2007 (2007-08-15), pages 114 - 135
MARTIN SCHMIDT ET AL.: "Continuous-Time Bandpass Delta-Sigma Modulator for a Signal Frequency of 2.2GHz", GERMAN MICROWAVE CONFERENCE, 2009, March 2009 (2009-03-01), pages 1 - 4, XP031449729
TSAI-PI HUNG ET AL.: "Design of H-Bridge Class-D Power Amplifiers for Digital Pulse Modulation Transmitters", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 55, no. 12, December 2007 (2007-12-01), pages 2845 - 2854, XP011197404, DOI: doi:10.1109/TMTT.2007.909881
Attorney, Agent or Firm:
SunCrest Patent and Trademark Attorneys (JP)
Patent business corporation Sun Crest international patent firm (JP)
Patent business corporation Sun Crest international patent firm (JP)
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