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Title:
TRANSMITTER
Document Type and Number:
WIPO Patent Application WO/2014/042270
Kind Code:
A1
Abstract:
The transmitter according to the present invention is provided with: a plurality of digital transmitters for outputting the result of delta-sigma modulating the same baseband signal; a synthesizer for outputting the result of synthesizing the output signals of the plurality of digital transmitters; a control unit for generating a different external signal for each digital transmitter, to be supplied to the digital transmitters; and an input means for inputting a different external signal for each digital transmitter to an internal node or an input terminal of a delta-sigma modulator for performing delta-sigma modulation, provided for each digital transmitter.

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Inventors:
HORI SHINICHI (JP)
KUNIHIRO KAZUAKI (JP)
SHIIKUMA KAZUMI (JP)
Application Number:
PCT/JP2013/074994
Publication Date:
March 20, 2014
Filing Date:
September 17, 2013
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H04B1/04; H03F1/06; H03F3/217; H03F3/68
Domestic Patent References:
WO2011070952A12011-06-16
WO2001078120A12001-10-18
Foreign References:
JP2011091757A2011-05-06
JP2006254307A2006-09-21
JP2005086611A2005-03-31
JP2011077979A2011-04-14
Other References:
TSAI-PI HUNG ET AL.: "Design of H-Bridge Class-D Power Amplifiers for Digital Pulse Modulation Transmitters", IEEE TRANS. MICROWAVE THEORY AND TECHNIQUES, vol. 55, no. 12, December 2007 (2007-12-01), pages 2845 - 2855, XP011197404
S. HORI, K. KUNIHIRO; K. TAKAHASHI; M. FUKAISHI: "A 0.7-3GHz envelope delta-sigma modulator using phase modulated carrier clock for multi-mode/band switching amplifiers", IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM DIGEST, June 2011 (2011-06-01), pages 35 - 38
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
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