EE9400370A - Lülitusskeem sageduse automaatseks reguleerimiseks raadiotelefonis - Google Patents

Lülitusskeem sageduse automaatseks reguleerimiseks raadiotelefonis

Info

Publication number
EE9400370A
EE9400370A EE9400370A EE9400370A EE9400370A EE 9400370 A EE9400370 A EE 9400370A EE 9400370 A EE9400370 A EE 9400370A EE 9400370 A EE9400370 A EE 9400370A EE 9400370 A EE9400370 A EE 9400370A
Authority
EE
Estonia
Prior art keywords
radiotelephone
frequency adjustment
wiring diagram
automatic frequency
automatic
Prior art date
Application number
EE9400370A
Other languages
English (en)
Estonian (et)
Inventor
Heinonen Jarmo
Original Assignee
Nokia Mobile Phones Ltd.
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 Nokia Mobile Phones Ltd. filed Critical Nokia Mobile Phones Ltd.
Publication of EE9400370A publication Critical patent/EE9400370A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/026—Means preventing a wrong working of the automatic frequency correction in case of fading or bad signal/noise ratio
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked 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
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H03L7/146—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted by using digital means for generating the oscillator control signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)
EE9400370A 1991-02-22 1994-11-23 Lülitusskeem sageduse automaatseks reguleerimiseks raadiotelefonis EE9400370A (et)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI910861A FI91821C (fi) 1991-02-22 1991-02-22 Radiopuhelimen automaattinen taajuudensäätökytkentä

Publications (1)

Publication Number Publication Date
EE9400370A true EE9400370A (et) 1996-04-15

Family

ID=8531962

Family Applications (1)

Application Number Title Priority Date Filing Date
EE9400370A EE9400370A (et) 1991-02-22 1994-11-23 Lülitusskeem sageduse automaatseks reguleerimiseks raadiotelefonis

Country Status (4)

Country Link
US (1) US5335364A (fi)
EE (1) EE9400370A (fi)
FI (1) FI91821C (fi)
GB (1) GB2253750B (fi)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994003981A1 (en) * 1992-08-06 1994-02-17 Motorola Inc. Radio having a combined pll and afc loop and method of operating the same
US5304955A (en) * 1992-11-19 1994-04-19 Motorola, Inc. Voltage controlled oscillator operating with digital controlled loads in a phase lock loop
EP0599409B1 (en) * 1992-11-26 2003-02-12 Koninklijke Philips Electronics N.V. A direct conversion receiver
JPH084235B2 (ja) * 1993-03-31 1996-01-17 日本電気株式会社 周波数制御装置
US5511235A (en) * 1994-05-02 1996-04-23 Motorola, Inc. Apparatus for detecting a signaling channel during scanning including a controlled frequency converter circuit and a controlled filter bandwidth, and a method therefor
US5669067A (en) * 1994-06-29 1997-09-16 Harris Corporation Remotely controllable variable intermediate frequency transceiver
FR2729518B1 (fr) * 1995-01-13 1997-06-06 Sgs Thomson Microelectronics Boucle a verrouillage de phase de demodulation d'un signal module en frequence
GB9505522D0 (en) * 1995-03-18 1995-05-03 Gen Electric Co Plc Commodity consumption registering meters
JP2704136B2 (ja) * 1995-06-20 1998-01-26 埼玉日本電気株式会社 無線送受信機
KR0164381B1 (ko) * 1995-12-30 1999-02-01 김광호 디지탈 무선 통신시스템의 자동 주파수 조절회로
US6075979A (en) * 1996-03-20 2000-06-13 U.S. Philips Corporation Radio receivers
GB2315197B (en) * 1996-07-11 2000-07-12 Nokia Mobile Phones Ltd Method and apparatus for system clock adjustment
JP3042418B2 (ja) * 1996-09-27 2000-05-15 日本電気株式会社 ディジタル受信機の周波数調整方法及び周波数調整回路
JP2880971B2 (ja) * 1996-11-15 1999-04-12 埼玉日本電気株式会社 周波数安定化回路
JP3226807B2 (ja) * 1996-11-20 2001-11-05 静岡日本電気株式会社 無線呼出システム用の自動周波数補正装置および自動周波数補正方法
JP3050146B2 (ja) * 1996-11-28 2000-06-12 日本電気株式会社 デジタル温度補償発振器
US6044118A (en) * 1997-05-05 2000-03-28 Nokia Mobile Phones Limited Method for adjusting the frequency of an oscillator for a receiver circuit
DE69821863T2 (de) * 1997-05-23 2004-12-30 Koninklijke Philips Electronics N.V. Empfänger mit einer phasenverriegelten schleife
CA2217840C (en) * 1997-10-09 2005-05-03 Northern Telecom Limited Synchronization system multiple modes of operation
GB9804708D0 (en) * 1998-03-05 1998-04-29 Nec Technologies Uk Ltd Radio transmitter/reciever channel selection
US6684059B1 (en) 1999-08-27 2004-01-27 Tachyon, Inc. Frequency generation in a wireless communication system
US6917252B1 (en) * 2003-04-28 2005-07-12 Adam S. Wyszynski Fully integrated automatically-tuned RF and IF active bandpass filters
TWI222797B (en) * 2003-07-01 2004-10-21 Benq Corp Compensation method and device of the voltage-controlled crystal oscillator in mobile unit
JP5100966B2 (ja) * 2005-01-17 2012-12-19 ソニーモバイルコミュニケーションズ株式会社 非接触型近距離無線通信装置、携帯電話端末
JP4374463B2 (ja) * 2006-12-26 2009-12-02 日本電波工業株式会社 発振周波数制御回路
JP4355350B2 (ja) 2007-11-16 2009-10-28 日本電波工業株式会社 発振周波数制御回路
US8259876B2 (en) 2008-03-21 2012-09-04 Skyworks Solutions, Inc. System and method for tuning a radio receiver
JP5611070B2 (ja) * 2011-01-28 2014-10-22 ルネサスエレクトロニクス株式会社 半導体集積回路およびその動作方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8202685A (nl) * 1982-07-05 1984-02-01 Philips Nv Kloksignaalregenerator met hoge stabiliteit.
JPS6173416A (ja) * 1984-09-19 1986-04-15 Nec Corp 自動周波数制御・自動利得制御回路
US4817197A (en) * 1986-07-18 1989-03-28 Nippon Telegraph And Telephone Corporation Mobile communication apparatus
JPH0744485B2 (ja) * 1987-05-22 1995-05-15 三菱電機株式会社 自動車電話装置
US4849993A (en) * 1987-12-10 1989-07-18 Silicon General, Inc. Clock holdover circuit
JPH07105756B2 (ja) * 1988-06-29 1995-11-13 松下電器産業株式会社 移動通信方法
FI85636C (fi) * 1988-08-19 1992-05-11 Nokia Mobira Oy Foerfarande och koppling foer automatisk, pao en raeknare baserad reglering av frekvensen i en radiotelefon.
JPH0370218A (ja) * 1989-08-09 1991-03-26 Hitachi Ltd 受信波基準校正形周波数シンセサイザ
US5170492A (en) * 1990-01-22 1992-12-08 Motorola, Inc. Digitally frequency-locking a radio transceiver to the received signal

Also Published As

Publication number Publication date
GB2253750B (en) 1995-05-10
FI910861A (fi) 1992-08-23
FI91821C (fi) 1994-08-10
GB2253750A (en) 1992-09-16
FI91821B (fi) 1994-04-29
FI910861A0 (fi) 1991-02-22
GB9203597D0 (en) 1992-04-08
US5335364A (en) 1994-08-02

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