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Title:
FRACTIONAL FREQUENCY DIVIDER CIRCUIT AND TRANSMITTER
Document Type and Number:
Japanese Patent JP2015043536
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fractional frequency divider circuit capable of reducing undesired tone with a simple constitution.SOLUTION: There is provided a fractional frequency divider circuit which has an integer frequency division circuit and an adjustment circuit. The integer frequency division circuit converts a reference signal K (K is a positive integer) phase signals. Each of the K phase signals has a 1/n frequency (n is a positive integer) of the reference signal. Each of the K phase signals has a phase different from each other. The adjustment circuit performs weighting addition on plural signals according to K phase signals to generate fractional frequency division signals. The fractional frequency division signal has an m times frequency (m is a positive integer not multiple of n) of each of plural phase signals.

Inventors:
YAMAJI TAKAFUMI
SUZUKI TSUNEO
Application Number:
JP2013174920A
Publication Date:
March 05, 2015
Filing Date:
August 26, 2013
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
H04L27/36; H03K23/68
Domestic Patent References:
JPS61171205A1986-08-01
JP2010109716A2010-05-13
JP2009017003A2009-01-22
JP2006067520A2006-03-09
JP2012060431A2012-03-22
JP2007258904A2007-10-04
JPS61171205A1986-08-01
JP2010109716A2010-05-13
JP2009017003A2009-01-22
Foreign References:
WO2012032936A12012-03-15
WO2011104802A12011-09-01
WO2012032936A12012-03-15
Attorney, Agent or Firm:
Hiroaki Sakai