GB2137836B - Fm demodulators - Google Patents

Fm demodulators

Info

Publication number
GB2137836B
GB2137836B GB08408977A GB8408977A GB2137836B GB 2137836 B GB2137836 B GB 2137836B GB 08408977 A GB08408977 A GB 08408977A GB 8408977 A GB8408977 A GB 8408977A GB 2137836 B GB2137836 B GB 2137836B
Authority
GB
United Kingdom
Prior art keywords
demodulators
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.)
Expired
Application number
GB08408977A
Other versions
GB8408977D0 (en
GB2137836A (en
Inventor
Alexander Peter Lax
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.)
Multitone Electronics PLC
Original Assignee
Multitone Electronics PLC
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 Multitone Electronics PLC filed Critical Multitone Electronics PLC
Priority to GB08408977A priority Critical patent/GB2137836B/en
Publication of GB8408977D0 publication Critical patent/GB8408977D0/en
Publication of GB2137836A publication Critical patent/GB2137836A/en
Application granted granted Critical
Publication of GB2137836B publication Critical patent/GB2137836B/en
Expired 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
    • H04L27/1525—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 using quadrature demodulation

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Superheterodyne Receivers (AREA)
GB08408977A 1983-04-06 1984-04-06 Fm demodulators Expired GB2137836B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08408977A GB2137836B (en) 1983-04-06 1984-04-06 Fm demodulators

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8309328 1983-04-06
GB08408977A GB2137836B (en) 1983-04-06 1984-04-06 Fm demodulators

Publications (3)

Publication Number Publication Date
GB8408977D0 GB8408977D0 (en) 1984-05-16
GB2137836A GB2137836A (en) 1984-10-10
GB2137836B true GB2137836B (en) 1986-07-23

Family

ID=26285747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08408977A Expired GB2137836B (en) 1983-04-06 1984-04-06 Fm demodulators

Country Status (1)

Country Link
GB (1) GB2137836B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180419A (en) * 1985-09-16 1987-03-25 Philips Electronic Associated Direct conversion receiver
GB2192108B (en) * 1986-03-11 1989-11-08 Plessey Co Plc Improvements relating to communication systems
US4739284A (en) * 1987-05-04 1988-04-19 Motorola, Inc. Phase locked loop having fast frequency lock steering circuit
JPH04310037A (en) * 1991-04-09 1992-11-02 Nec Corp Fsk receiver
JP2982567B2 (en) * 1993-07-20 1999-11-22 松下電器産業株式会社 Receiver
GB2280801B (en) * 1993-08-06 1997-12-10 Plessey Semiconductors Ltd Automatic frequency control arrangement
EP0723335B1 (en) * 1995-01-19 2000-06-07 Matsushita Electric Industrial Co., Ltd. Radio receiver apparatus of orthogonal detection type comprising local oscillator means with improved automatic frequency control arrangement
US6081560A (en) * 1996-03-02 2000-06-27 U.S. Philips Corporation Production of a frequency control signal in an FSK receiver
KR20010014264A (en) 1998-04-28 2001-02-26 요트.게.아. 롤페즈 Simplified receiver for frequency shift keyed signals
DE10335044B4 (en) * 2003-08-01 2006-04-20 Infineon Technologies Ag Demodulation arrangement for a radio signal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1530602A (en) * 1975-10-14 1978-11-01 Standard Telephones Cables Ltd Demodulator for fm signals
FR2368184A1 (en) * 1976-10-18 1978-05-12 Ibm France CARRIER SYNCHRONIZATION SYSTEM FOR COHERENT PHASE DEMODULATOR
GB2086158B (en) * 1980-08-23 1984-05-02 Plessey Co Ltd Radio receiver
FR2510331A1 (en) * 1981-07-23 1983-01-28 Leclert Alain CIRCUIT FOR REGENERATING A CARRIER WAVE
GB2109201B (en) * 1981-10-26 1985-03-27 Philips Electronic Associated Direct modulation fm receiver
GB2122437B (en) * 1982-05-26 1986-03-19 Motorola Ltd Fsk receiver with twin stable state pll
GB2124840A (en) * 1982-07-02 1984-02-22 Philips Electronic Associated Data demodulator for digital signals

Also Published As

Publication number Publication date
GB8408977D0 (en) 1984-05-16
GB2137836A (en) 1984-10-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960406