HK1055044A1 - Pll synthesizer in a cellular phone - Google Patents

Pll synthesizer in a cellular phone

Info

Publication number
HK1055044A1
HK1055044A1 HK03107122A HK03107122A HK1055044A1 HK 1055044 A1 HK1055044 A1 HK 1055044A1 HK 03107122 A HK03107122 A HK 03107122A HK 03107122 A HK03107122 A HK 03107122A HK 1055044 A1 HK1055044 A1 HK 1055044A1
Authority
HK
Hong Kong
Prior art keywords
cellular phone
pll synthesizer
pll
synthesizer
cellular
Prior art date
Application number
HK03107122A
Other languages
English (en)
Inventor
Megumi Endo
Original Assignee
Nec Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Corp filed Critical Nec Corp
Publication of HK1055044A1 publication Critical patent/HK1055044A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
    • H03L7/0891—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth
HK03107122A 2001-09-14 2003-10-02 Pll synthesizer in a cellular phone HK1055044A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001279863A JP2003087116A (ja) 2001-09-14 2001-09-14 Ｐｌｌシンセサイザ

Publications (1)

Publication Number Publication Date
HK1055044A1 true HK1055044A1 (en) 2003-12-19

Family

ID=19103960

Family Applications (1)

Application Number Title Priority Date Filing Date
HK03107122A HK1055044A1 (en) 2001-09-14 2003-10-02 Pll synthesizer in a cellular phone

Country Status (5)

Country Link
US (1) US6727763B2 (ja)
JP (1) JP2003087116A (ja)
CN (1) CN1242638C (ja)
GB (1) GB2380340B (ja)
HK (1) HK1055044A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8150362B2 (en) * 2003-04-03 2012-04-03 Maxim Integrated Products, Inc. Electronically tuned agile integrated bandpass filter
WO2005112381A1 (ja) * 2004-05-17 2005-11-24 Mitsubishi Denki Kabushiki Kaisha 無線通信装置及び復調方法及び周波数偏差補正回路
US7339420B2 (en) * 2004-07-27 2008-03-04 Matsushita Electric Industrial Co., Ltd. Method of switching PLL characteristics and PLL circuit
US20060140320A1 (en) * 2004-12-23 2006-06-29 Jensen Richard S Mechanism to adjust a clock signal based on embedded clock information
JP2006261714A (ja) 2005-03-15 2006-09-28 Renesas Technology Corp 通信用半導体集積回路および携帯通信端末
WO2006137031A2 (en) * 2005-06-21 2006-12-28 Nxp B.V. Phase-locked loop systems using adaptive low-pass filters in switched bandwidth feedback loops
US7809973B2 (en) * 2005-11-16 2010-10-05 Cypress Semiconductor Corporation Spread spectrum clock for USB
JP4754580B2 (ja) * 2005-12-27 2011-08-24 パナソニック株式会社 位相同期回路
US7973608B2 (en) 2006-11-30 2011-07-05 Semiconductor Energy Laboratory Co., Ltd. Phase locked loop, semiconductor device, and wireless tag
US7994947B1 (en) 2008-06-06 2011-08-09 Maxim Integrated Products, Inc. Method and apparatus for generating a target frequency having an over-sampled data rate using a system clock having a different frequency
JP6247763B2 (ja) * 2013-11-27 2017-12-13 テレフオンアクチーボラゲット エルエム エリクソン（パブル） キャリブレーション測定のための回路、方法、コンピュータプログラム及び電子デバイス

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729688A (en) * 1971-12-15 1973-04-24 Motorola Inc Oscillator with switchable filter control voltage input for rapidly switching to discrete frequency outputs
US4745371A (en) 1985-08-02 1988-05-17 Libera Developments Limited Phase-locked digital synthesizer
US5534823A (en) 1994-02-28 1996-07-09 Nec Corporation Phase locked loop (PLL) circuit having variable loop filter for shortened locking time
JP2591487B2 (ja) 1994-06-30 1997-03-19 日本電気株式会社 Ｐｌｌシンセサイザ無線選択呼出受信機
JPH0964733A (ja) 1995-08-26 1997-03-07 Nec Corp 周波数シンセサイザ
JPH09121156A (ja) 1995-10-25 1997-05-06 Sony Corp Ｐｌｌ回路およびディジタル信号再生装置
US6583675B2 (en) * 2001-03-20 2003-06-24 Broadcom Corporation Apparatus and method for phase lock loop gain control using unit current sources

Also Published As

Publication number Publication date
GB2380340A (en) 2003-04-02
US6727763B2 (en) 2004-04-27
CN1409572A (zh) 2003-04-09
JP2003087116A (ja) 2003-03-20
GB0221337D0 (en) 2002-10-23
US20030058054A1 (en) 2003-03-27
CN1242638C (zh) 2006-02-15
GB2380340B (en) 2004-03-17

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20110914