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Title:
VECTOR SYNTHESIS TYPE PHASE SHIFTER, OPTICAL TRANSCEIVER, AND CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2010/021280
Kind Code:
A1
Abstract:
A vector synthesis type phase shifter comprises a 90º phase shifter (1) which produces an in-phase signal (VINI) and an orthogonal signal (VINQ) from an input signal (VIN), a four-quadrant multiplier (2I) which changes the amplitude of the in-phase signal (VINI) according to a control signal (CI), a four-quadrant multiplier (2Q) which changes the amplitude of the orthogonal signal (VINQ) according to a control signal (CQ), a synthesizer (3) which synthesizes an in-phase signal (VXI) and an orthogonal signal (VXQ), and a control circuit (4). The control circuit (4) comprises a voltage generator which generates a reference voltage, and a differential amplifier which outputs a difference signal between a control voltage (VC) and the reference voltage as control signals (CI, CQ). The differential amplifier performs analog computation to convert the control voltage (VC) to control signals (CI, CQ) that resemble a sine wave or cosine wave.

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Inventors:
NOSAKA HIDEYUKI (JP)
HASE MUNEHIKO (JP)
YAMANAKA SHOGO (JP)
SANO KIMIKAZU (JP)
MURATA KOICHI (JP)
ONODERA KIYOMITSU (JP)
ENOKI TAKATOMO (JP)
Application Number:
PCT/JP2009/064237
Publication Date:
February 25, 2010
Filing Date:
August 12, 2009
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
NOSAKA HIDEYUKI (JP)
HASE MUNEHIKO (JP)
YAMANAKA SHOGO (JP)
SANO KIMIKAZU (JP)
MURATA KOICHI (JP)
ONODERA KIYOMITSU (JP)
ENOKI TAKATOMO (JP)
International Classes:
H03H11/20; H03H17/08; H04B10/50
Foreign References:
JPH0779131A1995-03-20
JPH10150363A1998-06-02
JP2008028681A2008-02-07
JPH10256884A1998-09-25
JP2003008399A2003-01-10
JP2007208472A2007-08-16
JP2004032446A2004-01-29
JPH0363093B21991-09-30
Other References:
See also references of EP 2326002A4
"K-Band Phased Arrays", IEEE JOURNAL OF SOLID-STATE CIRCUITS, vol. 42, 11 November 2007 (2007-11-11), pages 2535 - 2546
PAUL R. GRAY; ROBERT G. MEYER: "Analysis and design of analog integrated circuits", 1977, JOHN WILEY & SONS, INC., pages: 227 - 231
Attorney, Agent or Firm:
YAMAKAWA, Masaki et al. (JP)
Masaki Yamakawa (JP)
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