GB2127243B - Variable frequency oscillator - Google Patents

Variable frequency oscillator

Info

Publication number
GB2127243B
GB2127243B GB08319601A GB8319601A GB2127243B GB 2127243 B GB2127243 B GB 2127243B GB 08319601 A GB08319601 A GB 08319601A GB 8319601 A GB8319601 A GB 8319601A GB 2127243 B GB2127243 B GB 2127243B
Authority
GB
United Kingdom
Prior art keywords
variable frequency
frequency oscillator
oscillator
variable
frequency
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
GB08319601A
Other versions
GB2127243A (en
GB8319601D0 (en
Inventor
Masayuki Ikeda
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.)
Suwa Seikosha KK
Epson Corp
Original Assignee
Suwa Seikosha KK
Epson 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 Suwa Seikosha KK, Epson Corp filed Critical Suwa Seikosha KK
Publication of GB8319601D0 publication Critical patent/GB8319601D0/en
Publication of GB2127243A publication Critical patent/GB2127243A/en
Application granted granted Critical
Publication of GB2127243B publication Critical patent/GB2127243B/en
Expired legal-status Critical Current

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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • 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
    • H03L7/07—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop using several loops, e.g. for redundant clock signal generation
    • 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
    • H03L7/0995—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop the oscillator comprising a ring oscillator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB08319601A 1982-08-05 1983-07-20 Variable frequency oscillator Expired GB2127243B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57136683A JPH0712146B2 (en) 1982-08-05 1982-08-05 VFO circuit

Publications (3)

Publication Number Publication Date
GB8319601D0 GB8319601D0 (en) 1983-08-24
GB2127243A GB2127243A (en) 1984-04-04
GB2127243B true GB2127243B (en) 1986-03-19

Family

ID=15181029

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08319601A Expired GB2127243B (en) 1982-08-05 1983-07-20 Variable frequency oscillator

Country Status (4)

Country Link
JP (1) JPH0712146B2 (en)
GB (1) GB2127243B (en)
HK (1) HK80889A (en)
SG (1) SG21289G (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6215159U (en) * 1985-07-12 1987-01-29
CA1284361C (en) * 1986-08-29 1991-05-21 Mitel Corporation Analog phase locked loop
US5302919A (en) * 1990-10-23 1994-04-12 Seiko Epson Corporation VCO having voltage-to-current converter and PLL using same
US5646562A (en) * 1993-07-21 1997-07-08 Seiko Epson Corporation Phase synchronization circuit, one-shot pulse generating circuit and signal processing system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616886B2 (en) * 1974-12-30 1981-04-18
JPS5260052A (en) * 1975-11-12 1977-05-18 Fujitsu Ltd Phase control circuit featuring self-run frequency setting medium
US4131861A (en) * 1977-12-30 1978-12-26 International Business Machines Corporation Variable frequency oscillator system including two matched oscillators controlled by a phase locked loop
JPS5924191Y2 (en) * 1979-07-13 1984-07-18 三洋電機株式会社 Synthesizer-receiver AFC circuit
JPS57181232A (en) * 1981-04-30 1982-11-08 Fujitsu Ltd Voltage-controlled oscillator circuit

Also Published As

Publication number Publication date
GB2127243A (en) 1984-04-04
GB8319601D0 (en) 1983-08-24
HK80889A (en) 1989-10-20
SG21289G (en) 1992-12-04
JPS5928209A (en) 1984-02-14
JPH0712146B2 (en) 1995-02-08

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20030719