GB1069074A - Improvements in oscillator circuits - Google Patents

Improvements in oscillator circuits

Info

Publication number
GB1069074A
GB1069074A GB2187863A GB2187863A GB1069074A GB 1069074 A GB1069074 A GB 1069074A GB 2187863 A GB2187863 A GB 2187863A GB 2187863 A GB2187863 A GB 2187863A GB 1069074 A GB1069074 A GB 1069074A
Authority
GB
United Kingdom
Prior art keywords
transducer
frequency
oscillator
valve
output stage
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
GB2187863A
Inventor
John Frederick Noyes
Dennis Arthur Gates
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.)
Plessey UK Ltd
Original Assignee
Plessey UK 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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB2187863A priority Critical patent/GB1069074A/en
Publication of GB1069074A publication Critical patent/GB1069074A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
    • B06B1/0253—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken directly from the generator circuit
    • 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
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/22—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being vacuum tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/50—Application to a particular transducer type
    • B06B2201/55—Piezoelectric transducer

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1,069,074. Valve and transistor oscillator circuits. PLESSEY-U.K. Ltd. Aug. 28, 1964 [May 31, 1963], No. 21878/63. Headings H3T and H3F. An arrangement for driving a sonic or ultrasonic transducer comprises an oscillator and a power output stage, there being a feedback path from the output stage such that the frequency of the oscillator follows the resonant frequency of the transducer. Valves V1, V2 are cross-coupled to act as a multivibrator, but the circuit comprises additional phaseshifting elements including variable resistor VFC. Transducer T is driven via power output stage V3 and inductor I; feedback via (i) the anode to grid capacity of this valve and capacitor C5 and also (ii) stray capacitive coupling between the transducer, output valve, inductor I and the oscillator cause the frequency of oscillation to lock on to that of the transducer. In a modification, the oscillator is of the phaseshift type and is frequency-modulated at 50 c.p.s. by injecting part of the heater supply into the R.C. coupling network (Fig. 2, not shown), so that the frequency is swept over a small range until the transducer frequency is reached, whereupon locking occurs. It is stated in the Specification that semi-conductor devices may be used instead of valves.
GB2187863A 1963-05-31 1963-05-31 Improvements in oscillator circuits Expired GB1069074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2187863A GB1069074A (en) 1963-05-31 1963-05-31 Improvements in oscillator circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2187863A GB1069074A (en) 1963-05-31 1963-05-31 Improvements in oscillator circuits

Publications (1)

Publication Number Publication Date
GB1069074A true GB1069074A (en) 1967-05-17

Family

ID=10170335

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2187863A Expired GB1069074A (en) 1963-05-31 1963-05-31 Improvements in oscillator circuits

Country Status (1)

Country Link
GB (1) GB1069074A (en)

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