GB546319A - Improvements in piezo-electric circuits - Google Patents

Improvements in piezo-electric circuits

Info

Publication number
GB546319A
GB546319A GB6427/41A GB642741A GB546319A GB 546319 A GB546319 A GB 546319A GB 6427/41 A GB6427/41 A GB 6427/41A GB 642741 A GB642741 A GB 642741A GB 546319 A GB546319 A GB 546319A
Authority
GB
United Kingdom
Prior art keywords
crystal
frequency
impedance
valve
circuit
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
GB6427/41A
Other languages
English (en)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB546319A publication Critical patent/GB546319A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
GB6427/41A 1940-05-18 1941-05-19 Improvements in piezo-electric circuits Expired GB546319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US335963A US2274486A (en) 1940-05-18 1940-05-18 Piezoelectric resonator circuit

Publications (1)

Publication Number Publication Date
GB546319A true GB546319A (en) 1942-07-07

Family

ID=23313988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6427/41A Expired GB546319A (en) 1940-05-18 1941-05-19 Improvements in piezo-electric circuits

Country Status (3)

Country Link
US (1) US2274486A (enrdf_load_stackoverflow)
GB (1) GB546319A (enrdf_load_stackoverflow)
NL (1) NL61184C (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424246A (en) * 1943-09-16 1947-07-22 Bell Telephone Labor Inc Frequency-modulated crystal oscillator
US2577297A (en) * 1944-01-22 1951-12-04 Antranikian Haig Signaling system
US2539268A (en) * 1945-04-25 1951-01-23 Motorola Inc Oscillator
US2881390A (en) * 1952-04-21 1959-04-07 Gen Electric Piezo-electric type frequency changer
NL97163C (enrdf_load_stackoverflow) * 1953-03-04
US2872577A (en) * 1956-08-13 1959-02-03 Robert W Hart High frequency integrating signal detector

Also Published As

Publication number Publication date
NL61184C (enrdf_load_stackoverflow)
US2274486A (en) 1942-02-24

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