JPS5654104A - Phase modulation circuit - Google Patents

Phase modulation circuit

Info

Publication number
JPS5654104A
JPS5654104A JP13015079A JP13015079A JPS5654104A JP S5654104 A JPS5654104 A JP S5654104A JP 13015079 A JP13015079 A JP 13015079A JP 13015079 A JP13015079 A JP 13015079A JP S5654104 A JPS5654104 A JP S5654104A
Authority
JP
Japan
Prior art keywords
phase modulation
modulation circuit
switch
variance
compress
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
JP13015079A
Other languages
Japanese (ja)
Inventor
Keikichi Okada
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.)
Denso Ten Ltd
Original Assignee
Denso Ten 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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP13015079A priority Critical patent/JPS5654104A/en
Publication of JPS5654104A publication Critical patent/JPS5654104A/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

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To compress the extent of variance for the modulation characteristics, by almost making the tuning frequency of a tank circuit conicide with the selected carrier frequency, through the interlocking between a channel change-over switch and a DC bias selector switch. CONSTITUTION:When quartz oscillators X1-X5 are connected alternatively to a quartz oscillator 1 with a channel change-over switch S0, the carrier is selectively led to a phase modulation circuit MOD. Simultaneously, the DC bias is switched with a switch S2 and the tuning frequency of tank circuits T1, T2 is reset to an optimum value every time when the carrier frequency of the phase modulation circuit MOD changes, allowing to compress the extent of variance of the modulation characteristics.
JP13015079A 1979-10-09 1979-10-09 Phase modulation circuit Pending JPS5654104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13015079A JPS5654104A (en) 1979-10-09 1979-10-09 Phase modulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13015079A JPS5654104A (en) 1979-10-09 1979-10-09 Phase modulation circuit

Publications (1)

Publication Number Publication Date
JPS5654104A true JPS5654104A (en) 1981-05-14

Family

ID=15027168

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13015079A Pending JPS5654104A (en) 1979-10-09 1979-10-09 Phase modulation circuit

Country Status (1)

Country Link
JP (1) JPS5654104A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48104548A (en) * 1972-04-12 1973-12-27
JPS5211038A (en) * 1975-07-16 1977-01-27 Canon Inc Copying machine with an automatic repeated transport device for the or iginal document
JPS5391747A (en) * 1976-12-25 1978-08-11 Ricoh Co Ltd Copier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48104548A (en) * 1972-04-12 1973-12-27
JPS5211038A (en) * 1975-07-16 1977-01-27 Canon Inc Copying machine with an automatic repeated transport device for the or iginal document
JPS5391747A (en) * 1976-12-25 1978-08-11 Ricoh Co Ltd Copier

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