Title:
FREQUENCY SYNTHESIZER
Document Type and Number:
WIPO Patent Application WO/2013/008355
Kind Code:
A1
Abstract:
Provided is a digitally controlled frequency synthesizer that is insusceptible to disturbance/noise and which does not utilize a ∆∑ modulator. The frequency synthesizer for digitally controlling oscillatory frequencies is provided with: a loop gain adjustment unit (5) that generates digital control data for adjusting the loop gain of said frequency synthesizer; a DA conversion unit (6) that converts the lower bits of the digital control data into an analog voltage; and an oscillation unit (1) that oscillates at a frequency that corresponds to the higher bits of the digital control data and the analog voltage output from the DA conversion unit (6).
Inventors:
OHARA ATSUSHI
YAMASAKI HIDETOSHI
YAMASAKI HIDETOSHI
Application Number:
PCT/JP2012/000215
Publication Date:
January 17, 2013
Filing Date:
January 16, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
OHARA ATSUSHI
YAMASAKI HIDETOSHI
OHARA ATSUSHI
YAMASAKI HIDETOSHI
International Classes:
H03L7/099; H03B5/08; H03L7/093; H03L7/10; H03L7/107
Foreign References:
| JP2010021686A | 2010-01-28 | |||
| JP2006217203A | 2006-08-17 | |||
| JPH09162730A | 1997-06-20 | |||
| US20070085579A1 | 2007-04-19 |
Other References:
NEYER, A. ET AL.: "A fully integrated all- digital PLL based FM-radio Transmitter in 90 nm CMOS", 8TH IEEE INTERNATIONAL NEWCAS CONFERENCE, 20 June 2010 (2010-06-20), pages 225 - 228
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
Patent business corporation MAEDA PATENT OFFICE (JP)
Patent business corporation MAEDA PATENT OFFICE (JP)
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Claims:
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