HK25797A - Dual mode automatic frequency control - Google Patents

Dual mode automatic frequency control

Info

Publication number
HK25797A
HK25797A HK25797A HK25797A HK25797A HK 25797 A HK25797 A HK 25797A HK 25797 A HK25797 A HK 25797A HK 25797 A HK25797 A HK 25797A HK 25797 A HK25797 A HK 25797A
Authority
HK
Hong Kong
Prior art keywords
frequency control
dual mode
automatic frequency
mode automatic
dual
Prior art date
Application number
HK25797A
Other languages
English (en)
Inventor
Randall W Rich
Rashid M Osmani
Thomas J Walczak
Stephen V Cahill
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of HK25797A publication Critical patent/HK25797A/xx

Links

Classifications

    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0032—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage with analogue quadrature frequency conversion to and from the baseband
    • 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
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • 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
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
    • H04L27/2272—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals using phase locked loops

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Transceivers (AREA)
HK25797A 1990-07-30 1997-03-06 Dual mode automatic frequency control HK25797A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/559,775 US5163159A (en) 1990-07-30 1990-07-30 Dual mode automatic frequency control
PCT/US1991/004874 WO1992002991A1 (en) 1990-07-30 1991-07-11 Dual mode automatic frequency control

Publications (1)

Publication Number Publication Date
HK25797A true HK25797A (en) 1997-03-06

Family

ID=24234969

Family Applications (1)

Application Number Title Priority Date Filing Date
HK25797A HK25797A (en) 1990-07-30 1997-03-06 Dual mode automatic frequency control

Country Status (10)

Country Link
US (1) US5163159A (xx)
JP (1) JP2621657B2 (xx)
AU (1) AU655934B2 (xx)
CA (1) CA2066420C (xx)
DE (2) DE4191766C2 (xx)
FR (1) FR2665991A1 (xx)
GB (1) GB2253751B (xx)
HK (1) HK25797A (xx)
MX (1) MX9100427A (xx)
WO (1) WO1992002991A1 (xx)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2773524B2 (ja) * 1992-02-29 1998-07-09 日本電気株式会社 ディジタル移動無線受信機
IL102051A (en) * 1992-05-29 1996-05-14 Tadiran Ltd Vehicle location unit
JP3241098B2 (ja) * 1992-06-12 2001-12-25 株式会社東芝 多方式対応の受信装置
ATE214852T1 (de) * 1992-06-29 2002-04-15 Motorola Inc Zweimodenempfänger mit batterieschonungsmöglichkeit
FI102798B1 (fi) * 1992-07-28 1999-02-15 Nokia Mobile Phones Ltd Digitaalisen matkapuhelimen radiotaajuusosan piirijärjestely
US5418818A (en) * 1992-09-22 1995-05-23 Glenayre Electronics, Inc. Digital signal processor exciter
US5867537A (en) * 1992-10-27 1999-02-02 Ericsson Inc. Balanced tranversal I,Q filters for quadrature modulators
US5727023A (en) * 1992-10-27 1998-03-10 Ericsson Inc. Apparatus for and method of speech digitizing
US5745523A (en) * 1992-10-27 1998-04-28 Ericsson Inc. Multi-mode signal processing
US5530722A (en) * 1992-10-27 1996-06-25 Ericsson Ge Mobile Communications Inc. Quadrature modulator with integrated distributed RC filters
US5483686A (en) * 1992-11-02 1996-01-09 Matsushita Electric Industrial Co., Ltd. Channel selecting apparatus for simultaneous use with both phase-continuous modulation signals and digital modulation signals
CA2154180C (en) * 1993-02-17 1999-04-06 Alan L. Wilson Multiple-modulation communication system
US5392460A (en) * 1993-04-23 1995-02-21 Nokia Mobile Phones Ltd. Dual mode radiotelephone terminal selectively operable for frequency modulated or phase modulated operation
CA2127190A1 (en) * 1993-08-06 1995-02-07 Stephen Vincent Cahill Apparatus and method for automatically controlling a reference frequency in a dual mode receiver
JPH07154439A (ja) * 1993-11-26 1995-06-16 Nec Eng Ltd 復調装置
DE4341435A1 (de) * 1993-12-04 1995-06-08 Bosch Gmbh Robert Funkgerät
US5701589A (en) * 1994-05-20 1997-12-23 Motorola, Inc. Method for adjusting reference frequencies in a communication system
US5519887A (en) * 1994-08-09 1996-05-21 At&T Corp. Switchable filter phase-locked loop frequency synthesizer device and method for achieving dual-mode cellular communications
JPH08204763A (ja) * 1994-11-21 1996-08-09 Sony Corp 送信機及び送受信機
ZA9510509B (en) * 1994-12-23 1996-05-30 Qualcomm Inc Dual-mode digital FM communication system
US5774195A (en) * 1995-01-24 1998-06-30 Kabushiki Kaisha Toshiba Broadcasting system discriminating television receiver for differentiating between analog and digital telecast signals
US5825833A (en) * 1995-01-31 1998-10-20 Mitsumi Electric Co., Ltd. Digital and analog reception apparatus
GB9505522D0 (en) * 1995-03-18 1995-05-03 Gen Electric Co Plc Commodity consumption registering meters
US6006108A (en) * 1996-01-31 1999-12-21 Qualcomm Incorporated Digital audio processing in a dual-mode telephone
GB2310342A (en) * 1996-02-16 1997-08-20 Northern Telecom Ltd Dual mode radio transceiver front end
US6026129A (en) 1996-03-27 2000-02-15 Matsushita Electric Industrial Co., Ltd. Radio receiving apparatus for receiving communication signals of different bandwidths
GB2314981A (en) * 1996-07-02 1998-01-14 Plessey Semiconductors Ltd Radio receiver arrangements
US6546044B1 (en) * 1996-10-11 2003-04-08 Ericsson Inc. Dual-mode radiotelephone apparatus for digital or analog modulation
SE519263C2 (sv) * 1996-12-02 2003-02-04 Ericsson Telefon Ab L M Anordning för sändning på flera frekvenser i ett radiokommunikationssystem
US6154204A (en) * 1998-01-21 2000-11-28 Evolve Products, Inc. Tap antenna unit
DE69831478T2 (de) * 1998-03-14 2006-01-26 Siemens Ag Multibandempfänger für Multibandfunksignalen und Multibandmobilfunktelefon mit einen Empfänger
US5982823A (en) * 1998-03-17 1999-11-09 Northrop Grumman Corp Direct frequency selection and down-conversion for digital receivers
KR100274089B1 (ko) * 1998-09-02 2000-12-15 윤종용 듀얼모드 단말기의 자동주파수 제어회로 및 방법
JP3551235B2 (ja) 1999-06-25 2004-08-04 日本電気株式会社 Ａｆｃ回路
JP3576880B2 (ja) * 1999-09-09 2004-10-13 日本電気株式会社 自動変調方式識別装置及び自動変調方式識別方法
US6799062B1 (en) 2000-10-19 2004-09-28 Motorola Inc. Full-duplex hands-free transparency circuit and method therefor
US20030060180A1 (en) * 2001-09-27 2003-03-27 Hall William E. Image reject receiver
US6741840B2 (en) * 2002-03-13 2004-05-25 Motorola, Inc. RF transmitters with saturation detection and correction and methods therefor
ITMI20041599A1 (it) * 2004-08-03 2004-11-03 Prod El S P A Metodo e apparecchiatura per comunicazioni radio con moduklazione analogica e digitale
CN115276800B (zh) * 2022-07-28 2023-07-25 徐州智谷光频产业研究院有限公司 基于数字信号与模拟信号混合调制解调的可见光通信系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648732A (en) * 1979-09-28 1981-05-02 Nec Corp Radio equipment
US4335401A (en) * 1980-08-28 1982-06-15 Rca Corporation Rapid correlation of recorded information
US4677690A (en) * 1982-01-25 1987-06-30 International Telephone And Telegraph Corporation Baseband demodulator for FM and/or AM signals
US4704734A (en) * 1986-02-18 1987-11-03 Motorola, Inc. Method and apparatus for signal strength measurement and antenna selection in cellular radiotelephone systems
WO1988003342A1 (en) * 1986-10-31 1988-05-05 Motorola, Inc. Ssb communiction system with fm data capability
US4852086A (en) * 1986-10-31 1989-07-25 Motorola, Inc. SSB communication system with FM data capability
US4893094A (en) * 1989-03-13 1990-01-09 Motorola, Inc. Frequency synthesizer with control of start-up battery saving operations

Also Published As

Publication number Publication date
US5163159A (en) 1992-11-10
AU655934B2 (en) 1995-01-19
CA2066420A1 (en) 1992-01-31
JPH05502152A (ja) 1993-04-15
GB2253751A (en) 1992-09-16
JP2621657B2 (ja) 1997-06-18
GB9207025D0 (en) 1992-05-27
FR2665991A1 (fr) 1992-02-21
GB2253751B (en) 1994-04-27
AU8395091A (en) 1992-03-02
WO1992002991A1 (en) 1992-02-20
DE4191766T1 (de) 1997-07-31
CA2066420C (en) 1996-10-22
FR2665991B1 (xx) 1995-03-31
MX9100427A (es) 1992-02-28
DE4191766C2 (de) 1999-08-19

Similar Documents

Publication Publication Date Title
GB2253751B (en) Dual mode automatic frequency control
EP0441593A3 (en) Automatic frequency control circuit
EP0430034A3 (en) Automatic gain control
GB2289383B (en) Automatic frequency control apparatus
GB2243018B (en) Magnetron
GB2240226B (en) Automatic frequency control circuit
AU4140893A (en) Automatic frequency control circuit
GB2280801B (en) Automatic frequency control arrangement
EP0335370A3 (en) Automatic frequency control circuit
GB2253314B (en) Dual mode automatic gain control
GB2253958B (en) Frequency control circuitry
EP0302290A3 (en) Automatic frequency control system
CS9004249A2 (en) Automatic switch
GB9019857D0 (en) Volume control
GB2259181B (en) Magnetron
GB2258961B (en) Frequency control system
GB9003209D0 (en) Hob control
GB8515533D0 (en) Automatic frequency control
GB9002593D0 (en) Magnetrons
GB9318324D0 (en) Magnetron
HU9203717D0 (en) Circuit arrangement for controlling signals
IL114423A0 (en) Automatic frequency control
PL284151A1 (en) Magnetron
CA66674S (en) Radio transmitter control
GB2242308B (en) Magnetrons

Legal Events

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