GB2127243B - Variable frequency oscillator - Google Patents

Variable frequency oscillator

Info

Publication number: GB2127243B
Authority: GB; United Kingdom
Prior art keywords: variable frequency; frequency oscillator; oscillator; variable; frequency
Prior art date: 1982-08-05
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

GB8319601D0 (en

GB2127243A (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.)

1982-08-05

Filing date

1983-07-20

Publication date

1986-03-19

1983-07-20 Application filed by Suwa Seikosha KK, Epson Corp filed Critical Suwa Seikosha KK

1983-08-24 Publication of GB8319601D0 publication Critical patent/GB8319601D0/en

1984-04-04 Publication of GB2127243A publication Critical patent/GB2127243A/en

1986-03-19 Application granted granted Critical

1986-03-19 Publication of GB2127243B publication Critical patent/GB2127243B/en

Status 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

1982
- 1982-08-05 JP JP57136683A patent/JPH0712146B2/en not_active Expired - Lifetime
1983
- 1983-07-20 GB GB08319601A patent/GB2127243B/en not_active Expired
1989
- 1989-04-07 SG SG21289A patent/SG21289G/en unknown
- 1989-10-12 HK HK80889A patent/HK80889A/en not_active IP Right Cessation

Also Published As

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

Legal Events

Date	Code	Title	Description
1989-03-08	732	Registration of transactions, instruments or events in the register (sect. 32/1977)
2003-08-13	PE20	Patent expired after termination of 20 years	Effective date: 20030719

Publication	Publication Date	Title
GB2137384B (en)	1986-08-06	Variable frequency divider
EP0172560A3 (en)	1988-01-07	Variable frequency synthesizer
IL61913A0 (en)	1981-02-27	Synchronized frequency synthesizer
DE3370733D1 (en)	1987-05-07	Microwave oscillator
GB2141299B (en)	1986-11-12	Variable frequency oscillator
GB2092844B (en)	1984-09-05	Frequency synthesizer
GB8310678D0 (en)	1983-05-25	Frequency shifted cavity
GB2053608B (en)	1983-12-14	Variable frequency oscillator
DE3374827D1 (en)	1988-01-14	Frequency synthesiser
DE3374506D1 (en)	1987-12-17	Frequency synthesiser
DE3477315D1 (en)	1989-04-20	Microwave oscillator
EP0109122A3 (en)	1985-10-09	Frequency synthesiser
GB2045556B (en)	1983-08-03	Frequency synthesizers
DE3373168D1 (en)	1987-09-24	Low noise microwave frequency synthesizer
DE3175667D1 (en)	1987-01-15	Frequency synthesizer
GB2063603B (en)	1983-10-05	Frequency controlled oscillator circuit
GB2113930B (en)	1985-03-13	Frequency discriminator
DE3374828D1 (en)	1988-01-14	Frequency synthesiser
DE3266414D1 (en)	1985-10-24	Frequency synthesizer with fast tuning
DE3373046D1 (en)	1987-09-17	Variable frequency oscillator
GB2091960B (en)	1985-06-19	High speed frequency synthesizer
US4803445B1 (en)	1993-09-07	Variable frequency oscillator
GB2127243B (en)	1986-03-19	Variable frequency oscillator
DE3366556D1 (en)	1986-11-06	Oscillator circuit
GB8315296D0 (en)	1983-07-06	Frequency synthesizer