GB918932A - Transistor oscillators - Google Patents

Transistor oscillators

Info

Publication number
GB918932A
GB918932A GB28816/60A GB2881660A GB918932A GB 918932 A GB918932 A GB 918932A GB 28816/60 A GB28816/60 A GB 28816/60A GB 2881660 A GB2881660 A GB 2881660A GB 918932 A GB918932 A GB 918932A
Authority
GB
United Kingdom
Prior art keywords
coil
transistor
frequency
oscillator
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
GB28816/60A
Inventor
James Douglas Jones
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.)
Pye Electronic Products Ltd
Original Assignee
Pye 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 Pye Ltd filed Critical Pye Ltd
Priority to GB28816/60A priority Critical patent/GB918932A/en
Priority to FR870634A priority patent/FR1298086A/en
Priority to ES0269969A priority patent/ES269969A1/en
Publication of GB918932A publication Critical patent/GB918932A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/1256—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a variable inductance
    • 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
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1296—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the feedback circuit comprising a transformer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

918,932. Transistor mixing and oscillating circuits. PYE Ltd. Aug. 15, 1961 [Aug. 19, 1960], No. 28816/60. Class 40 (6). In a transistor oscillator, the oscillation frequency is maintained constant with supply variations by connecting in series with the collector a resistor, the value of which is equal to the product of a resistor connected in series with the emitter, and the working gain of the transistor when biased to produce the desired output power from the oscillator. In a first embodiment, Fig. 1, the local oscillator of a television receiver operating on Bands I and III comprises a Colpitts circuit, the frequency of oscillation of which is determined by coil L1, which may be interchanged with others to cover channels 1-12. A channel 13 coil, L2, is always in circuit, and a fine-tuning capacitor C1 is connected to a tap on this coil. Frequency variations with supply voltage are minimized by adjusting R2, R3 to give the required output, and then making R4 equal to BR1, where B is the gain in grounded emitter configuration. Changes in frequency with ambient temperature are compensated by employing capacitors of the negative temperature coefficient type for either C2 or C3 or both. In a second embodiment, Fig. 2, a self-oscillating mixer has its input applied to the base of transistor T2 from aerial coil L10. The oscillator circuit comprises the resonant circuit L12, C15, C17, C18 back-coupled by means of a further coil L13. The I.F. output is taken from resonant circuit L14, C16. Frequency variations with supply voltage are minimized as before by adjusting R12, R13 to give the required output and making R14 equal to BR11. Specification 918,931 is referred to.
GB28816/60A 1960-08-19 1960-08-19 Transistor oscillators Expired GB918932A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB28816/60A GB918932A (en) 1960-08-19 1960-08-19 Transistor oscillators
FR870634A FR1298086A (en) 1960-08-19 1961-08-11 Transistor oscillator
ES0269969A ES269969A1 (en) 1960-08-19 1961-08-17 Transistor oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28816/60A GB918932A (en) 1960-08-19 1960-08-19 Transistor oscillators

Publications (1)

Publication Number Publication Date
GB918932A true GB918932A (en) 1963-02-20

Family

ID=10281636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28816/60A Expired GB918932A (en) 1960-08-19 1960-08-19 Transistor oscillators

Country Status (2)

Country Link
ES (1) ES269969A1 (en)
GB (1) GB918932A (en)

Also Published As

Publication number Publication date
ES269969A1 (en) 1961-11-16

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