Title:
∆Σ MODULATOR AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/133061
Kind Code:
A1
Abstract:
Provided is a ∆Σ modulator that is capable of outputting an output signal that includes multiple output signals of different frequencies. The ∆Σ modulator is equipped with: multiple input ports to which multiple input signals of different frequencies are respectively input; multiple loop filters that are provided so as to respectively correspond to the multiple input ports; an adder for adding up outputs of the multiple loop filters; and a quantizer for quantizing an output of the adder. An input signal input to a corresponding input port and a feedback signal output from the quantizer are input to each of the multiple loop filters. The multiple loop filters respectively have properties for blocking noise in the vicinity of the frequencies of the input signals input to the corresponding input ports.
Inventors:
MAEHATA TAKASHI (JP)
Application Number:
PCT/JP2014/054822
Publication Date:
September 04, 2014
Filing Date:
February 27, 2014
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H03M3/02
Foreign References:
| JP2003234638A | 2003-08-22 | |||
| JPH0613906A | 1994-01-21 | |||
| JP2009545899A | 2009-12-24 |
Other References:
TORU KITAYABU ET AL.: "A Proposal of Transmitter Configuration for Multi-Band Aggregation System", NEN TSUSHIN SOCIETY TAIKAI KOEN RONBUNSHU 1, 1 September 2009 (2009-09-01), pages 420, XP008180878
TORU KITAYABU ET AL.: "Concurrent Dual-Band Transmitter Architecture for Spectrum Aggregation System", RADIO AND WIRELESS SYMPOSIUM(RWS), 2010, 10 January 2010 (2010-01-10), pages 689 - 692, XP031650199
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, 7 October 2013 (2013-10-07), pages 1523 - 1526, XP032535592
TAKAO WAHO; AKIRA YASUDA: "Understanding Delta-Sigma Data Converters", 2007, MARUZEN CO., LTD.
See also references of EP 2963827A4
TORU KITAYABU ET AL.: "Concurrent Dual-Band Transmitter Architecture for Spectrum Aggregation System", RADIO AND WIRELESS SYMPOSIUM(RWS), 2010, 10 January 2010 (2010-01-10), pages 689 - 692, XP031650199
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, 7 October 2013 (2013-10-07), pages 1523 - 1526, XP032535592
TAKAO WAHO; AKIRA YASUDA: "Understanding Delta-Sigma Data Converters", 2007, MARUZEN CO., LTD.
See also references of EP 2963827A4
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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