JPS56132002A - Frequency modulating circuit - Google Patents

Frequency modulating circuit

Info

Publication number
JPS56132002A
JPS56132002A JP3560280A JP3560280A JPS56132002A JP S56132002 A JPS56132002 A JP S56132002A JP 3560280 A JP3560280 A JP 3560280A JP 3560280 A JP3560280 A JP 3560280A JP S56132002 A JPS56132002 A JP S56132002A
Authority
JP
Japan
Prior art keywords
circuit
transistor
oscillating
frequency
collector
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.)
Granted
Application number
JP3560280A
Other languages
Japanese (ja)
Other versions
JPS6318888B2 (en
Inventor
Masao Harajiri
Toshikatsu Takimoto
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 General Ltd
Gen Co Ltd
Original Assignee
Fujitsu General Ltd
Gen 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 Fujitsu General Ltd, Gen Co Ltd filed Critical Fujitsu General Ltd
Priority to JP3560280A priority Critical patent/JPS56132002A/en
Publication of JPS56132002A publication Critical patent/JPS56132002A/en
Publication of JPS6318888B2 publication Critical patent/JPS6318888B2/ja
Granted 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
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • H03C3/16—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit in which the active element simultaneously serves as the active element of an oscillator

Landscapes

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

Abstract

PURPOSE:To obtain a frequency modulation wave, by changing the power source voltage of the oscillating circuit according to the amplitude level of the modulation signal to vary the collector output capacity of the transistor constituting the oscillating circuit. CONSTITUTION:The frequency modulating circuit consists of collector tuning type RF self-oscillating circuit 10 and modulating circuit 26. The tuning circuit of this frequency modulating circuit consists of coil 13, capacitor 14, and the collector output capacity of oscillating transistor 11. When the voltage applied to the base of modulating transistor 20 is varied, collector potential Vc and emitter potential Ve of transistor 11 in oscillating circuit 10 are changed, and the collector output capacity of oscillating transistor 11 is changed. As a result, the tuning frequency is changed.
JP3560280A 1980-03-19 1980-03-19 Frequency modulating circuit Granted JPS56132002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3560280A JPS56132002A (en) 1980-03-19 1980-03-19 Frequency modulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3560280A JPS56132002A (en) 1980-03-19 1980-03-19 Frequency modulating circuit

Publications (2)

Publication Number Publication Date
JPS56132002A true JPS56132002A (en) 1981-10-16
JPS6318888B2 JPS6318888B2 (en) 1988-04-20

Family

ID=12446363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3560280A Granted JPS56132002A (en) 1980-03-19 1980-03-19 Frequency modulating circuit

Country Status (1)

Country Link
JP (1) JPS56132002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008311790A (en) * 2007-06-12 2008-12-25 National Institute Of Information & Communication Technology Microwave and millimeter-wave communication device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0241493U (en) * 1988-09-12 1990-03-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008311790A (en) * 2007-06-12 2008-12-25 National Institute Of Information & Communication Technology Microwave and millimeter-wave communication device

Also Published As

Publication number Publication date
JPS6318888B2 (en) 1988-04-20

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