CA2106140A1 - FSK Receiver Having a PLL Local Oscillator Operable in Intermittent Operation in Accordance with Its Phase Locked State - Google Patents

FSK Receiver Having a PLL Local Oscillator Operable in Intermittent Operation in Accordance with Its Phase Locked State

Info

Publication number
CA2106140A1
CA2106140A1 CA2106140A CA2106140A CA2106140A1 CA 2106140 A1 CA2106140 A1 CA 2106140A1 CA 2106140 A CA2106140 A CA 2106140A CA 2106140 A CA2106140 A CA 2106140A CA 2106140 A1 CA2106140 A1 CA 2106140A1
Authority
CA
Canada
Prior art keywords
pll
signal
local oscillator
control signal
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2106140A
Other languages
French (fr)
Other versions
CA2106140C (en
Inventor
Yoichiro Minami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Yoichiro Minami
Nec Corporation
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 Yoichiro Minami, Nec Corporation filed Critical Yoichiro Minami
Publication of CA2106140A1 publication Critical patent/CA2106140A1/en
Application granted granted Critical
Publication of CA2106140C publication Critical patent/CA2106140C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/144—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements
    • H04L27/152—Demodulator circuits; Receiver circuits with demodulation using spectral properties of the received signal, e.g. by using frequency selective- or frequency sensitive elements using controlled oscillators, e.g. PLL arrangements
    • 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
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop

Abstract

In an FSK receiver of double superheterodyne type for receiving an FSK modulated wave and comprising a PLL
local oscillator (10) for ensuring a phase-locked loop to produce a first local oscillation signal and a demodulating section (12) for demodulating the FSK
modulated wave into a demodulated signal using the first local oscillation signal and a second local oscillation signal, a control signal producing circuit (14) produces a control signal when the demodulated signal has a mean value indicative of a deviation from a phase lock in the phase-locked loop. Connected to the demodulating section, a synchronizing circuit (16) establishes bit and frame synchronization on the basis of a binary digital signal obtained by deciding the demodulated signal to produce a synchronization detection signal when the bit and frame synchronization is established. Connected to the PLL local oscillator, the control signal producing circuit, and the synchronizing circuit, an intermittent driving circuit (18) makes the PLL local oscillator intermittently operate on the basis of the control signal and the synchronization detection signal. The PLL
intermittent driving circuit makes the PLL local oscillator stop its PLL operation when the control signal is absent while the PLL intermittent driving circuit makes the PLL local oscillator activate the PLL operation when the control signal is present.
CA002106140A 1992-09-17 1993-09-14 Fsk receiver having a pll local oscillator operable in intermittent operation in accordance with its phase locked state Expired - Fee Related CA2106140C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP24700392A JP3146673B2 (en) 1992-09-17 1992-09-17 FSK receiver
JP247003/1992 1992-09-17

Publications (2)

Publication Number Publication Date
CA2106140A1 true CA2106140A1 (en) 1994-03-18
CA2106140C CA2106140C (en) 1998-10-13

Family

ID=17156939

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002106140A Expired - Fee Related CA2106140C (en) 1992-09-17 1993-09-14 Fsk receiver having a pll local oscillator operable in intermittent operation in accordance with its phase locked state

Country Status (5)

Country Link
US (1) US5402446A (en)
JP (1) JP3146673B2 (en)
KR (1) KR960007809B1 (en)
CA (1) CA2106140C (en)
GB (1) GB2271230B (en)

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CA2080050C (en) * 1991-10-09 1997-01-21 Hidehiko Norimatsu Power supply controller and frequency synthesizer using the same
US5621757A (en) * 1993-04-22 1997-04-15 Nec Corporation Circuit for measuring electric field by rapid measurement and normal measurement in a mobile communication system and method of using same
JPH07105739B2 (en) * 1993-06-08 1995-11-13 日本電気株式会社 Receiving machine
US5584062A (en) * 1994-01-24 1996-12-10 Motorola, Inc. Method and apparatus for compensating phase locked receivers
JP3073670B2 (en) * 1995-06-30 2000-08-07 松下電器産業株式会社 Intermittent reception receiver
JPH09162936A (en) * 1995-12-11 1997-06-20 Nec Corp Communication equipment with frequency offset correction function
KR100193836B1 (en) * 1995-12-29 1999-06-15 윤종용 Digital Wireless Communication System with Reduced Phase Synchronous Loop and Its Synchronization Method
JP2852240B2 (en) * 1996-05-30 1999-01-27 埼玉日本電気株式会社 Intermittent receiver
JPH1065566A (en) * 1996-08-23 1998-03-06 Matsushita Electric Ind Co Ltd Small sized radio equipment
US6011816A (en) * 1996-09-18 2000-01-04 Wireless Access Direct demodulation method and apparatus
CA2217840C (en) 1997-10-09 2005-05-03 Northern Telecom Limited Synchronization system multiple modes of operation
US6292522B1 (en) * 1997-11-13 2001-09-18 Lsi Logic Corporation Frequency decoder databank for phase-locked loop
JP3070733B2 (en) 1997-12-12 2000-07-31 日本電気株式会社 Automatic frequency control method and device
SE9804420L (en) * 1998-12-17 2000-06-18 Ericsson Telefon Ab L M Method for reducing power consumption in portable radio communication systems during standby mode, as well as a mobile station adapted to reduce power consumption during standby mode
US6157260A (en) * 1999-03-02 2000-12-05 Motorola, Inc. Method and apparatus for calibrating a local oscillator in a direct conversion receiver
FR2794310A1 (en) * 1999-05-28 2000-12-01 St Microelectronics Sa PHASE LOCKING DEVICE WITH REDUCED POWER CONSUMPTION
JP2001127728A (en) * 1999-10-29 2001-05-11 Oki Electric Ind Co Ltd Receiving circuit
FR2822616B1 (en) * 2001-03-21 2003-08-01 St Microelectronics Sa FREQUENCY MODULATED SIGNAL RECEIVER WITH DIGITAL DEMODULATOR
KR100416339B1 (en) * 2001-05-23 2004-01-31 (주)맥서스테크놀로지스 RF modem with frequency shift keying method having phase locked loop circuit for repeater
JP3689021B2 (en) * 2001-05-25 2005-08-31 三菱電機株式会社 Timing control apparatus and timing control method
KR100482009B1 (en) * 2002-10-22 2005-04-14 삼성전자주식회사 Semiconductor Wafer Transfer Apparatus
JP4349866B2 (en) * 2003-09-02 2009-10-21 三洋電機株式会社 FSK signal demodulation circuit
KR101104111B1 (en) * 2009-02-28 2012-01-13 옥윤선 Apparatus for manufacturing burlap bag and method for manufacturing burlap bag

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4521918A (en) * 1980-11-10 1985-06-04 General Electric Company Battery saving frequency synthesizer arrangement
GB2155262B (en) * 1984-03-01 1988-01-20 Standard Telephones Cables Ltd Radio receiver
US4860321A (en) * 1985-09-13 1989-08-22 Hughes Aircraft Company Lock detector for feedback loops
CA1282464C (en) * 1985-10-23 1991-04-02 Masanori Ienaka Phase-locked oscillator
JP2805767B2 (en) * 1988-09-26 1998-09-30 日本電気株式会社 Wireless transceiver
US4955075A (en) * 1988-10-17 1990-09-04 Motorola, Inc. Battery saver circuit for a frequency synthesizer
US4977613A (en) * 1988-10-17 1990-12-11 Motorola, Inc. Fine tuning frequency synthesizer with feedback loop for frequency control systems
JPH0355923A (en) * 1989-07-25 1991-03-11 Toyo Commun Equip Co Ltd Control method for local oscillation circuit of receiver
JP2513329B2 (en) * 1989-10-25 1996-07-03 日本電気株式会社 Frequency modulated wave receiver
US5103464A (en) * 1990-05-31 1992-04-07 Northern Telecom Limited Method and apparatus for timing recovery in digital data communications systems
US5175884A (en) * 1990-06-01 1992-12-29 Motorola, Inc. Voltage controlled oscillator with current control
JP2576266B2 (en) * 1990-06-13 1997-01-29 日本電気株式会社 FSK receiver

Also Published As

Publication number Publication date
JP3146673B2 (en) 2001-03-19
US5402446A (en) 1995-03-28
KR940008319A (en) 1994-04-29
GB2271230A (en) 1994-04-06
GB2271230B (en) 1996-06-26
KR960007809B1 (en) 1996-06-12
GB9319226D0 (en) 1993-11-03
CA2106140C (en) 1998-10-13
JPH06104941A (en) 1994-04-15

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