JPS55154804A - Voltage control type oscillator - Google Patents

Voltage control type oscillator

Info

Publication number
JPS55154804A
JPS55154804A JP6215479A JP6215479A JPS55154804A JP S55154804 A JPS55154804 A JP S55154804A JP 6215479 A JP6215479 A JP 6215479A JP 6215479 A JP6215479 A JP 6215479A JP S55154804 A JPS55154804 A JP S55154804A
Authority
JP
Japan
Prior art keywords
oscillation
fet23
drain
diode
capacitor
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
JP6215479A
Other languages
Japanese (ja)
Inventor
Takeshi Takano
Yoshitami Aono
Takao Shima
Yasuyuki Tokumitsu
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6215479A priority Critical patent/JPS55154804A/en
Publication of JPS55154804A publication Critical patent/JPS55154804A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
    • H03C3/225—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode using field effect 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
    • H03B5/1228—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 field effect transistors

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To fulfill excellent oscillation with a little parasitic oscillation and loss by applying an oscillation control voltage to the gate of a transistor via a diode by applying a positive voltage to the drain while grounding the drain via a capacitor. CONSTITUTION:Field effect transistor FET23 is used as a drain grounding type and the oscillation frequency of FET23 is varied by varactor diode 24. In this case, the drain of FET23 is grounded via capacitor 22 and also applied with positive voltage +VD. Then, diode 24 is connected to the gate of FET23 in terms of direct current and diode 24 is applied with an oscillation control voltage being grounded via capacitor 27. Consequently, excellent oscillation comes into effect with a little parasitic oscillation, loss, etc.
JP6215479A 1979-05-22 1979-05-22 Voltage control type oscillator Pending JPS55154804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6215479A JPS55154804A (en) 1979-05-22 1979-05-22 Voltage control type oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6215479A JPS55154804A (en) 1979-05-22 1979-05-22 Voltage control type oscillator

Publications (1)

Publication Number Publication Date
JPS55154804A true JPS55154804A (en) 1980-12-02

Family

ID=13191899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6215479A Pending JPS55154804A (en) 1979-05-22 1979-05-22 Voltage control type oscillator

Country Status (1)

Country Link
JP (1) JPS55154804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01183688A (en) * 1988-01-18 1989-07-21 Hitachi Ltd Dot clock reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01183688A (en) * 1988-01-18 1989-07-21 Hitachi Ltd Dot clock reproducing device

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