GB876052A - Improvements in or relating to oscillation generators - Google Patents

Improvements in or relating to oscillation generators

Info

Publication number
GB876052A
GB876052A GB3856659A GB3856659A GB876052A GB 876052 A GB876052 A GB 876052A GB 3856659 A GB3856659 A GB 3856659A GB 3856659 A GB3856659 A GB 3856659A GB 876052 A GB876052 A GB 876052A
Authority
GB
United Kingdom
Prior art keywords
resistor
circuit
condenser
frequencies
oscillation
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
GB3856659A
Inventor
Colin Arthur Sempers
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.)
Marconi Instruments Ltd
Original Assignee
Marconi Instruments 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 Marconi Instruments Ltd filed Critical Marconi Instruments Ltd
Priority to GB3856659A priority Critical patent/GB876052A/en
Publication of GB876052A publication Critical patent/GB876052A/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
    • H03B5/36—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
    • 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
    • H03B5/362—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 the amplifier being a single transistor

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

876,052. Transistor oscillating circuits. MARCONI INSTRUMENTS Ltd. May 17, 1960 [Nov. 13, 1959], No. 38566/59. Class 40(6) In a wide-range transistor oscillator which can also produce a number of accurate "spot" frequencies the base circuit of the transistor comprises a resistor 3 of such a value as to prevent oscillation. A tuned circuit comprising coil 7 and condenser 6 is connected in the collector circuit, being back-coupled for oscillation to the emitter circuit via a tap on the coil 7 and resistor 11 and condenser 12. The emitter is biased over resistor 14 and the collector obtains H.T. over choke 8 and decoupling condenser 9. Oscillation over a wide frequency range, tuned by condenser 6, can be obtained by closing switch 2. When the switch is open "spot" frequencies can be obtained by tuning the circuit 6, 7 to the fundamental or one of the harmonics of a piezoelectric crystal 4 shunting the resistor 3 and which is of low impedance, being series resonant at these frequencies.
GB3856659A 1959-11-13 1959-11-13 Improvements in or relating to oscillation generators Expired GB876052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3856659A GB876052A (en) 1959-11-13 1959-11-13 Improvements in or relating to oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3856659A GB876052A (en) 1959-11-13 1959-11-13 Improvements in or relating to oscillation generators

Publications (1)

Publication Number Publication Date
GB876052A true GB876052A (en) 1961-08-30

Family

ID=10404309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3856659A Expired GB876052A (en) 1959-11-13 1959-11-13 Improvements in or relating to oscillation generators

Country Status (1)

Country Link
GB (1) GB876052A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410905A1 (en) * 1977-12-02 1979-06-29 Siemens Ag SINGLE STAGE QUARTZ OSCILLATOR
EP0230876A1 (en) * 1986-01-09 1987-08-05 Siemens Aktiengesellschaft Variable-frequency quartz oscillator
WO2009138816A1 (en) * 2008-05-13 2009-11-19 Freescale Semiconductor, Inc. Oscillator circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410905A1 (en) * 1977-12-02 1979-06-29 Siemens Ag SINGLE STAGE QUARTZ OSCILLATOR
EP0230876A1 (en) * 1986-01-09 1987-08-05 Siemens Aktiengesellschaft Variable-frequency quartz oscillator
WO2009138816A1 (en) * 2008-05-13 2009-11-19 Freescale Semiconductor, Inc. Oscillator circuit
US8324977B2 (en) 2008-05-13 2012-12-04 Freescale Semiconductor, Inc. Oscillator circuit

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