JPS54150564A - Alarm circuit for pll circuit - Google Patents

Alarm circuit for pll circuit

Info

Publication number
JPS54150564A
JPS54150564A JP5938678A JP5938678A JPS54150564A JP S54150564 A JPS54150564 A JP S54150564A JP 5938678 A JP5938678 A JP 5938678A JP 5938678 A JP5938678 A JP 5938678A JP S54150564 A JPS54150564 A JP S54150564A
Authority
JP
Japan
Prior art keywords
phase
circuit
signal
alarm
lagging
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
JP5938678A
Other languages
Japanese (ja)
Other versions
JPS6224969B2 (en
Inventor
Akira Ikawa
Hiroshi Sunayama
Shinichi Tomizawa
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 JP5938678A priority Critical patent/JPS54150564A/en
Publication of JPS54150564A publication Critical patent/JPS54150564A/en
Publication of JPS6224969B2 publication Critical patent/JPS6224969B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Velocity Or Acceleration (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To present an alarm circuit highly reliable with an effect by drift and the like removed, by such functional method that, a pulse signal of constant width generated from the reference frequency signal to be the reference for the phase comparison, be compared with a phase difference output pulse width signal to obtain the alarm signal. CONSTITUTION:A phase comparator PC makes a comparison between the phases of reference frequency signal and controlled frequency signal, with its output pulse applied to a reference pulse generating circuit PG1, PG2 and a phase decision circuit P. A decision is made in the phase decision circuit P for whether the phase is leading or lagging, and a comparison is made with an output of the reference pulse generating circuit PG1, PG2 in a leading phase decision circuit P1 and lagging phase decision circuit P2. With a lagging or leading of the phase exceeding a reference value, an alarm signal arm is outputted through an OR circuit OR.
JP5938678A 1978-05-17 1978-05-17 Alarm circuit for pll circuit Granted JPS54150564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5938678A JPS54150564A (en) 1978-05-17 1978-05-17 Alarm circuit for pll circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5938678A JPS54150564A (en) 1978-05-17 1978-05-17 Alarm circuit for pll circuit

Publications (2)

Publication Number Publication Date
JPS54150564A true JPS54150564A (en) 1979-11-26
JPS6224969B2 JPS6224969B2 (en) 1987-06-01

Family

ID=13111783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5938678A Granted JPS54150564A (en) 1978-05-17 1978-05-17 Alarm circuit for pll circuit

Country Status (1)

Country Link
JP (1) JPS54150564A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008180A (en) * 1989-04-07 1991-04-16 Eastman Kodak Company Photographic recording material containing a cyan dye-forming coupler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128967A (en) * 1974-03-18 1975-10-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128967A (en) * 1974-03-18 1975-10-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008180A (en) * 1989-04-07 1991-04-16 Eastman Kodak Company Photographic recording material containing a cyan dye-forming coupler

Also Published As

Publication number Publication date
JPS6224969B2 (en) 1987-06-01

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