GB686979A - Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus - Google Patents

Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus

Info

Publication number
GB686979A
GB686979A GB2784950A GB2784950A GB686979A GB 686979 A GB686979 A GB 686979A GB 2784950 A GB2784950 A GB 2784950A GB 2784950 A GB2784950 A GB 2784950A GB 686979 A GB686979 A GB 686979A
Authority
GB
United Kingdom
Prior art keywords
piezo
relating
frequency selective
crystal controlled
electric 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
GB2784950A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2784950A priority Critical patent/GB686979A/en
Publication of GB686979A publication Critical patent/GB686979A/en
Expired 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
    • H03B5/30—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
    • H03B5/34—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 vacuum tube

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

686,979. Impedance networks. HALL, J. W. Nov. 14, 1951 [Nov. 14, 1950], No. 27849/50. Class 40 (viii). The range of frequency variation of a crystal controlled circuit is adjusted by means of a condenser in series with a parallel tuned circuit incorporating the crystal. As shown, the crystal 3, in the grid of oscillator valve 1, is series tuned by the variable condenser 6.
GB2784950A 1950-11-14 1950-11-14 Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus Expired GB686979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2784950A GB686979A (en) 1950-11-14 1950-11-14 Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2784950A GB686979A (en) 1950-11-14 1950-11-14 Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus

Publications (1)

Publication Number Publication Date
GB686979A true GB686979A (en) 1953-02-04

Family

ID=10266305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2784950A Expired GB686979A (en) 1950-11-14 1950-11-14 Improvements in or relating to piezo-electric crystal controlled frequency selective apparatus

Country Status (1)

Country Link
GB (1) GB686979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092787A (en) * 1960-07-21 1963-06-04 Avco Corp Crystal controlled multiple frequency generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092787A (en) * 1960-07-21 1963-06-04 Avco Corp Crystal controlled multiple frequency generator

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