JPS57166704A - Voltage-controlled oscillator - Google Patents

Voltage-controlled oscillator

Info

Publication number
JPS57166704A
JPS57166704A JP5195381A JP5195381A JPS57166704A JP S57166704 A JPS57166704 A JP S57166704A JP 5195381 A JP5195381 A JP 5195381A JP 5195381 A JP5195381 A JP 5195381A JP S57166704 A JPS57166704 A JP S57166704A
Authority
JP
Japan
Prior art keywords
voltage
control voltage
controlled oscillator
terminal
connection point
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
JP5195381A
Other languages
Japanese (ja)
Inventor
Shigeaki Ashida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5195381A priority Critical patent/JPS57166704A/en
Publication of JPS57166704A publication Critical patent/JPS57166704A/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
    • H03B5/02—Details

Landscapes

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

Abstract

PURPOSE:To improve the linearity of a voltage-controlled oscillator for communication equipment by connecting a negative resistance generating circuit to a varactor diode through a series of inductances, and grounding their inductance connection point via a capacitance. CONSTITUTION:A terminal 20 is connected to a varactor diode (D) 15 through a resistance (R) 17; and an inductance (L) 24 is connected to their connection point, and an L14 is connected in series to the L24, and further connected to a negative resistance generating circuit of an R21 and a C22 from a terminal 12 through a capacitor (C) 13. The connection point 26 of the L24 and L14 is grounded via a C25. A control voltage is applied to the terminal 20 to vary the oscillation frequency of the negative resistance generating circuit. Said constitution realizes the control voltage-barrier capacity characteristic curve of the D15 which has an upward projection, the linearity of control voltage-oscillation frequency characteristics is improved, and the modulation sensitivity of a voltage-controlled oscillator is made constant over a wide control voltage range.
JP5195381A 1981-04-06 1981-04-06 Voltage-controlled oscillator Pending JPS57166704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5195381A JPS57166704A (en) 1981-04-06 1981-04-06 Voltage-controlled oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5195381A JPS57166704A (en) 1981-04-06 1981-04-06 Voltage-controlled oscillator

Publications (1)

Publication Number Publication Date
JPS57166704A true JPS57166704A (en) 1982-10-14

Family

ID=12901230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5195381A Pending JPS57166704A (en) 1981-04-06 1981-04-06 Voltage-controlled oscillator

Country Status (1)

Country Link
JP (1) JPS57166704A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60214107A (en) * 1984-04-09 1985-10-26 Sony Corp Pll type demodulation circuit
JPS647412U (en) * 1987-06-30 1989-01-17

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934262A (en) * 1972-07-28 1974-03-29
JPS49135558A (en) * 1973-04-27 1974-12-27
JPS50104515A (en) * 1974-01-18 1975-08-18

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934262A (en) * 1972-07-28 1974-03-29
JPS49135558A (en) * 1973-04-27 1974-12-27
JPS50104515A (en) * 1974-01-18 1975-08-18

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60214107A (en) * 1984-04-09 1985-10-26 Sony Corp Pll type demodulation circuit
JPH0680983B2 (en) * 1984-04-09 1994-10-12 ソニー株式会社 PLL system demodulation circuit
JPS647412U (en) * 1987-06-30 1989-01-17

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