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Title:
INJECTION-LOCKED ODD FREQUENCY DIVIDER AND PLL CIRCUIT
Document Type and Number:
Japanese Patent JP2014123973
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an injection-locked frequency divider and a PLL circuit which implement a wide band of operating frequency by reducing the influence of parasitic capacitance.SOLUTION: An injection-locked frequency divider 100 includes: a ring oscillator 140 in which a first amplification circuit 141 comprising an N channel MOS transistor 111 and a P channel MOS transistor 112, and a second amplification circuit 142 and a third amplification circuit 143 having a similar configuration are cascade-connected in three ring stages; an N channel MOS transistor 150 having a drain connected with sources of the N channel MOS transistors 111, 121, 131 of the respective stages; and a differential signal injection circuit 160 for injecting an injection signal I1 into gates of the P channel MOS transistors 112, 122, 132 of the respective stages, and injecting a signal having the opposite phase to the injection signal I1 as a differential signal into a gate of the N channel MOS transistor 150.

Inventors:
SHIMA TAKAHIRO
SATO JUNJI
KOBAYASHI MASASHI
Application Number:
JP2014025392A
Publication Date:
July 03, 2014
Filing Date:
February 13, 2014
Export Citation:
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Assignee:
PANASONIC CORP
International Classes:
H03K23/48; H03K3/354; H03K23/44; H03L7/08; H03L7/24
Domestic Patent References:
JPS628602A1987-01-16
JP2004343521A2004-12-02
JP2006014352A2006-01-12
JP2008054134A2008-03-06
JP2002277840A2002-09-25
JPH09246957A1997-09-19
JPS628602A1987-01-16
JP2004343521A2004-12-02
JP2006014352A2006-01-12
JP2008054134A2008-03-06
JP2002277840A2002-09-25
JPH09246957A1997-09-19
Foreign References:
Other References:
JPN6013053390; Julie R. Hu and Brian P. Otis: 'A 3 muW, 400 MHz divide-by-5 injection-locked frequency divider with 56% lock range in 90nm CMOS' Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE , 2008, 665-668頁
JPN6013053390; Julie R. Hu and Brian P. Otis: 'A 3 muW, 400 MHz divide-by-5 injection-locked frequency divider with 56% lock range in 90nm CMOS' Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE , 2008, 665-668頁
Attorney, Agent or Firm:
鷲田 公一