JPS5644221A - Phase modulating circuit - Google Patents

Phase modulating circuit

Info

Publication number
JPS5644221A
JPS5644221A JP12009979A JP12009979A JPS5644221A JP S5644221 A JPS5644221 A JP S5644221A JP 12009979 A JP12009979 A JP 12009979A JP 12009979 A JP12009979 A JP 12009979A JP S5644221 A JPS5644221 A JP S5644221A
Authority
JP
Japan
Prior art keywords
phase
carrier
frequency
signals
terminal
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
JP12009979A
Other languages
Japanese (ja)
Other versions
JPS593894B2 (en
Inventor
Tetsuo Yoshida
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP12009979A priority Critical patent/JPS593894B2/en
Publication of JPS5644221A publication Critical patent/JPS5644221A/en
Publication of JPS593894B2 publication Critical patent/JPS593894B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/04—Position modulation, i.e. PPM

Landscapes

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

Abstract

PURPOSE:To reduce the phase noise, by using a pair of J-K flip-flops which are triggerred by pulse width modulation signals having phases opposite to each other. CONSTITUTION:The triangular wave signal input to carrier input terminal 32 has the phase inverted by wide-band amplifier 33 having a differential output and is applied to reference terminals of two high-speed voltage comparators 34 and 35 and is compared with the modulation signal input to terminal 31. Two-phase PWM signals having the opposite phase of the carrier wave are obtained as their outputs. They are frequency-divided by J-K flip-flops 37 and 38 to obtain small-phase noise PPM signals of the half frequency of the carrier wave. Exclusive OR among them is operated by exclusive OR gate 42, thus obtaining the PPM signal, which is equal to the carrier frequency and has maximum phase shift + or -90 deg., at output terminal 46.
JP12009979A 1979-09-20 1979-09-20 phase modulation circuit Expired JPS593894B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12009979A JPS593894B2 (en) 1979-09-20 1979-09-20 phase modulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12009979A JPS593894B2 (en) 1979-09-20 1979-09-20 phase modulation circuit

Publications (2)

Publication Number Publication Date
JPS5644221A true JPS5644221A (en) 1981-04-23
JPS593894B2 JPS593894B2 (en) 1984-01-26

Family

ID=14777880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12009979A Expired JPS593894B2 (en) 1979-09-20 1979-09-20 phase modulation circuit

Country Status (1)

Country Link
JP (1) JPS593894B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132057U (en) * 1982-03-02 1983-09-06 株式会社アイジ−技術研究所 siding board
JPS6228525U (en) * 1985-08-03 1987-02-20
EP1701442A1 (en) * 2005-03-08 2006-09-13 Synthesys Research, Inc. A method and apparatus for creating phase modulation in edge-sensitive signals

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132057U (en) * 1982-03-02 1983-09-06 株式会社アイジ−技術研究所 siding board
JPS6228525U (en) * 1985-08-03 1987-02-20
JPH028747Y2 (en) * 1985-08-03 1990-03-02
EP1701442A1 (en) * 2005-03-08 2006-09-13 Synthesys Research, Inc. A method and apparatus for creating phase modulation in edge-sensitive signals

Also Published As

Publication number Publication date
JPS593894B2 (en) 1984-01-26

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