JPS5534549A - Voltage control oscillator - Google Patents

Voltage control oscillator

Info

Publication number
JPS5534549A
JPS5534549A JP10699978A JP10699978A JPS5534549A JP S5534549 A JPS5534549 A JP S5534549A JP 10699978 A JP10699978 A JP 10699978A JP 10699978 A JP10699978 A JP 10699978A JP S5534549 A JPS5534549 A JP S5534549A
Authority
JP
Japan
Prior art keywords
frequency
diode
voltage control
circuit
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.)
Pending
Application number
JP10699978A
Other languages
Japanese (ja)
Inventor
Takenori Kurihara
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.)
Advantest Corp
Original Assignee
Advantest Corp
Takeda Riken Industries 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 Advantest Corp, Takeda Riken Industries Co Ltd filed Critical Advantest Corp
Priority to JP10699978A priority Critical patent/JPS5534549A/en
Publication of JPS5534549A publication Critical patent/JPS5534549A/en
Pending 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
    • H03B5/08—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
    • H03B5/1203—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
    • H03B5/1237—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
    • H03B5/1243—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 the means comprising voltage variable capacitance diodes

Abstract

PURPOSE:To increase the variable range of the oscillation frequency or to enhance the frequency purity by connecting the voltage control variable capacity diode between the tuning circuit of the clapp oscillation circuit and the base circuit of the transistor. CONSTITUTION:Voltage control variable capacity diode D1 is provided between the base of transistor Q and the turning circuit comprising coil L and voltage control variable capacity diode D0 of the clapp oscillation circuit. The capacity of diode D0 and Dv vary by controlling the voltage applied to terminal Tv, and thus the frequency obtained through output terminal T0 varies. Diode D1 contributes along with diode D0 to the variation of the frequency to increase the variable range of the frequency. When the variable range is fixed, the oscillator is used in the state under which Q is high in order to enchance the frequency purity for the oscillation output.
JP10699978A 1978-09-02 1978-09-02 Voltage control oscillator Pending JPS5534549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10699978A JPS5534549A (en) 1978-09-02 1978-09-02 Voltage control oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10699978A JPS5534549A (en) 1978-09-02 1978-09-02 Voltage control oscillator

Publications (1)

Publication Number Publication Date
JPS5534549A true JPS5534549A (en) 1980-03-11

Family

ID=14447908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10699978A Pending JPS5534549A (en) 1978-09-02 1978-09-02 Voltage control oscillator

Country Status (1)

Country Link
JP (1) JPS5534549A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101402A (en) * 1980-12-16 1982-06-24 Matsushita Electric Ind Co Ltd Voltage controlled variable frequency oscillator
US4593255A (en) * 1982-05-17 1986-06-03 Sharp Kabushiki Kaisha Varactor tuned Colpitts oscillator with compensating varactor for wide band width
US4847572A (en) * 1986-10-30 1989-07-11 Toko, Inc. Electronic tuning circuit for AM receiver
JPH06115128A (en) * 1992-07-03 1994-04-26 Matsushita Electric Ind Co Ltd Thermal recorder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156306A (en) * 1974-06-05 1975-12-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50156306A (en) * 1974-06-05 1975-12-17

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57101402A (en) * 1980-12-16 1982-06-24 Matsushita Electric Ind Co Ltd Voltage controlled variable frequency oscillator
JPS6157729B2 (en) * 1980-12-16 1986-12-08 Matsushita Electric Ind Co Ltd
US4593255A (en) * 1982-05-17 1986-06-03 Sharp Kabushiki Kaisha Varactor tuned Colpitts oscillator with compensating varactor for wide band width
US4847572A (en) * 1986-10-30 1989-07-11 Toko, Inc. Electronic tuning circuit for AM receiver
JPH06115128A (en) * 1992-07-03 1994-04-26 Matsushita Electric Ind Co Ltd Thermal recorder

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