JPS5445558A - Frequency adjusting set for oscillator - Google Patents

Frequency adjusting set for oscillator

Info

Publication number
JPS5445558A
JPS5445558A JP11198977A JP11198977A JPS5445558A JP S5445558 A JPS5445558 A JP S5445558A JP 11198977 A JP11198977 A JP 11198977A JP 11198977 A JP11198977 A JP 11198977A JP S5445558 A JPS5445558 A JP S5445558A
Authority
JP
Japan
Prior art keywords
oscillator
frequency
signal
switch
capacitance
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.)
Pending
Application number
JP11198977A
Other languages
Japanese (ja)
Inventor
Heihachiro Ebihara
Fukuo Sekiya
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP11198977A priority Critical patent/JPS5445558A/en
Priority to GB7836925A priority patent/GB2007450A/en
Publication of JPS5445558A publication Critical patent/JPS5445558A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/02—Details
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
    • 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
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE: To obtain the frequency adjustment stable in the oscillator adjusting the average value of frequency, by changing the rate of timing selecting a plural number of oscillating conditions.
CONSTITUTION: The input capacitance or output capacitance of the crystal oscillator 7 is divided into two capacitors 10 and 11 and they are taken respectively as C1 and C2. Further, the switch 12 is inserted between the capacitor C11 and ground as the selection means. The control signal ϕc is fed to the control input terminal of the switch. When this signal ϕC is at a high potential, the switch 12 is turned on, the capacitance at the point A is C1+C2, and the frequency of the oscillator is f1. When the signal ϕc is at a low potential, the capacitor at the point A is only C1, and the frequency of the oscillator is f2 (f2>F1). When the signal ϕC is at a high potential only time 7 in the unit time To, the average value f' of the output frequency of the oscillator can be adjusted by changing the value of 7/T with suitable selection of capacitors C1 and C2. In this case, the value to be changed can be 7 or To or the both
COPYRIGHT: (C)1979,JPO&Japio
JP11198977A 1977-09-17 1977-09-17 Frequency adjusting set for oscillator Pending JPS5445558A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11198977A JPS5445558A (en) 1977-09-17 1977-09-17 Frequency adjusting set for oscillator
GB7836925A GB2007450A (en) 1977-09-17 1978-09-15 Oscillator Circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11198977A JPS5445558A (en) 1977-09-17 1977-09-17 Frequency adjusting set for oscillator

Publications (1)

Publication Number Publication Date
JPS5445558A true JPS5445558A (en) 1979-04-10

Family

ID=14575147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11198977A Pending JPS5445558A (en) 1977-09-17 1977-09-17 Frequency adjusting set for oscillator

Country Status (2)

Country Link
JP (1) JPS5445558A (en)
GB (1) GB2007450A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010541320A (en) * 2007-09-21 2010-12-24 クゥアルコム・インコーポレイテッド Signal generator with adjustable frequency
US8385474B2 (en) 2007-09-21 2013-02-26 Qualcomm Incorporated Signal generator with adjustable frequency
JP2015115618A (en) * 2013-12-07 2015-06-22 株式会社アイカデザイン Phase locked loop circuit, and oscillation method

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063603B (en) * 1979-10-05 1983-10-05 Seikosha Kk Frequency controlled oscillator circuit
US4376919A (en) * 1979-10-16 1983-03-15 Seikosha Co., Ltd. Circuitry for switching effective electrode area on a crystal in a crystal oscillator to vary the oscillation frequency
FR2513041B1 (en) * 1981-09-15 1985-12-27 Thomson Csf Mat Tel OSCILLATOR WITH PIEZO-ELECTRIC ELEMENT SERVO
DE3920008A1 (en) * 1989-06-20 1991-01-10 Philips Patentverwaltung PHASE CONTROL CIRCUIT
KR930000965B1 (en) * 1989-08-17 1993-02-11 금성 일렉트론 주식회사 Programmable pulse generator
US5359635A (en) * 1993-04-19 1994-10-25 Codex, Corp. Programmable frequency divider in a phase lock loop
US5481228A (en) * 1993-10-15 1996-01-02 Hewlett-Packard Corporation Method and apparatus for controlling oscillator duty cycle
US6124764A (en) * 1999-01-22 2000-09-26 Telefonaktiebolaget Lm Ericsson Stable low-power oscillator
US7965805B2 (en) 2007-09-21 2011-06-21 Qualcomm Incorporated Signal generator with signal tracking
US8446976B2 (en) 2007-09-21 2013-05-21 Qualcomm Incorporated Signal generator with adjustable phase
GB0721540D0 (en) * 2007-11-02 2007-12-12 Eosemi Ltd Precision oscillator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010541320A (en) * 2007-09-21 2010-12-24 クゥアルコム・インコーポレイテッド Signal generator with adjustable frequency
US8385474B2 (en) 2007-09-21 2013-02-26 Qualcomm Incorporated Signal generator with adjustable frequency
JP2015015725A (en) * 2007-09-21 2015-01-22 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Signal generator with adjustable phase
JP2016001884A (en) * 2007-09-21 2016-01-07 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ Signal generator with adjustable frequency
JP2015115618A (en) * 2013-12-07 2015-06-22 株式会社アイカデザイン Phase locked loop circuit, and oscillation method

Also Published As

Publication number Publication date
GB2007450A (en) 1979-05-16

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