GB1163064A - Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like. - Google Patents

Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like.

Info

Publication number
GB1163064A
GB1163064A GB2784467A GB2784467A GB1163064A GB 1163064 A GB1163064 A GB 1163064A GB 2784467 A GB2784467 A GB 2784467A GB 2784467 A GB2784467 A GB 2784467A GB 1163064 A GB1163064 A GB 1163064A
Authority
GB
United Kingdom
Prior art keywords
voltage
resonant frequency
piezo
divider
piezo crystal
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
GB2784467A
Inventor
Donald Edward Bridges
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.)
Decca Ltd
Original Assignee
Decca 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 Decca Ltd filed Critical Decca Ltd
Priority to GB2784467A priority Critical patent/GB1163064A/en
Priority to DK278768A priority patent/DK119618B/en
Priority to FR1568658D priority patent/FR1568658A/fr
Priority to NL6808392A priority patent/NL150969B/en
Priority to NO232668A priority patent/NO128138B/no
Priority to JP4061368A priority patent/JPS4842751B1/ja
Publication of GB1163064A publication Critical patent/GB1163064A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
    • H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H13/00—Measuring resonant frequency
    • 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
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
    • H03B5/366—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device and comprising means for varying the frequency by a variable voltage or current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/022—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature
    • H03L1/023—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only by indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature by using voltage variable capacitance diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/028—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only of generators comprising piezoelectric resonators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

1,163,064. Oscillating circuits & divider networks &C. DECCA Ltd. 15 May, 1968 [16 June, 1967], No. 27844/67. Headings H3T and H3U. The invention relates to a piezo crystal oscillator or filter comprising two voltage dividers coupled together via an isolating network, both with a thermistor in one arm, the output of the second divider controlling the resonant frequency of the piezo crystal by means of a voltage controlled reactor in series with it. In Fig. 3, the resonant frequency of a piezo crystal is controlled by transistor Q 2 acting as a voltage controlled reactor through a 90 degree phase-shift line comprising capacitors C 6 , C 7 and inductor L 2 . The feedback signal to Q 2 is given a 90 degree phase-shift by resistor R 12 and capacitor C 2 . Its input signal is obtained from the second of two voltage dividers, both having a thermistor in one arm and being connected together via a transistor Q 1 . The input voltage to the first voltage divider is stabilized by means of a cct. comprising resistors R 5 , R 6 and Zener diodes Z 1 , Z 2 , Z 3 The thermistors Th 1 and Th 3 are given true exponential characteristics by means of paralleled resistors R 7 , R 10 respectively.
GB2784467A 1967-06-16 1967-06-16 Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like. Expired GB1163064A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB2784467A GB1163064A (en) 1967-06-16 1967-06-16 Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like.
DK278768A DK119618B (en) 1967-06-16 1968-06-14 Circuits for controlling the resonant frequency of a piezoelectric crystal.
FR1568658D FR1568658A (en) 1967-06-16 1968-06-14
NL6808392A NL150969B (en) 1967-06-16 1968-06-14 OSCILLATOR CIRCUIT WITH A PIEZO-ELECTRIC CRYSTAL, EQUIPPED WITH MEANS FOR COMPENSATING THE INFLUENCE OF TEMPERATURE ON THE RESONANCE FREQUENCY OF THE PIEZO-ELECTRIC CRYSTAL.
NO232668A NO128138B (en) 1967-06-16 1968-06-14
JP4061368A JPS4842751B1 (en) 1967-06-16 1968-06-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2784467A GB1163064A (en) 1967-06-16 1967-06-16 Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like.

Publications (1)

Publication Number Publication Date
GB1163064A true GB1163064A (en) 1969-09-04

Family

ID=10266224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2784467A Expired GB1163064A (en) 1967-06-16 1967-06-16 Circuits for Controlling the Resonant Frequency of a Piezo-Electric Crystal or the like.

Country Status (6)

Country Link
JP (1) JPS4842751B1 (en)
DK (1) DK119618B (en)
FR (1) FR1568658A (en)
GB (1) GB1163064A (en)
NL (1) NL150969B (en)
NO (1) NO128138B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233513A (en) * 1989-06-09 1991-01-09 Philips Electronic Associated Oscillators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233513A (en) * 1989-06-09 1991-01-09 Philips Electronic Associated Oscillators
US5025231A (en) * 1989-06-09 1991-06-18 U.S. Philips Corp. Temperature-controlled crystal oscillator circuit
AU622083B2 (en) * 1989-06-09 1992-03-26 Philips Electronics N.V. Temperature controlled crystal oscillator circuit

Also Published As

Publication number Publication date
DK119618B (en) 1971-02-01
NO128138B (en) 1973-10-01
NL150969B (en) 1976-09-15
JPS4842751B1 (en) 1973-12-14
NL6808392A (en) 1968-12-17
FR1568658A (en) 1969-05-23

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee