JPS556954A - Action monitor display circuit for digital afc or fc device - Google Patents

Action monitor display circuit for digital afc or fc device

Info

Publication number
JPS556954A
JPS556954A JP7941678A JP7941678A JPS556954A JP S556954 A JPS556954 A JP S556954A JP 7941678 A JP7941678 A JP 7941678A JP 7941678 A JP7941678 A JP 7941678A JP S556954 A JPS556954 A JP S556954A
Authority
JP
Japan
Prior art keywords
signal
segment
error
frequency
monitor
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
JP7941678A
Other languages
Japanese (ja)
Inventor
Hiroshi Sunayama
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 JP7941678A priority Critical patent/JPS556954A/en
Publication of JPS556954A publication Critical patent/JPS556954A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To facilitate an easy visual recognition and decision as well as to realize a miniature design, low power consumption and low cost by discontinuing the main display and giving the character display of the proper abbreviation instead in case the state of each action monitor display area becomes out of the fixed and normal operation region. CONSTITUTION:The error frequency output of frequency comparison part 9 is converted into the BCD signal and then applied to 7-segment display unit 16. On the other hand, the level reduction signal of detection part 6 where the output level is monitored for input amplification/waveform shaping part 4, the local signal level reduction signal of the same detection part 5, the frequency abnormal error forward signal indicating the error direction at part 9 plus the backward signal, and the offspecification signal are all supplied to centralized control monitor part 18. The signals of the characters are supplied to 7-segment encoder 19 from part 18 for conversion and then to 7-segment display unit 16. At the same time, part 18 controls BCD 7-segment encoder 15' and character 7-segment encoder 19 and displays the figures of the error frequency at the normal operation time and the characters of various types of monitor information at the abnormal action time respectively.
JP7941678A 1978-06-30 1978-06-30 Action monitor display circuit for digital afc or fc device Pending JPS556954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7941678A JPS556954A (en) 1978-06-30 1978-06-30 Action monitor display circuit for digital afc or fc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7941678A JPS556954A (en) 1978-06-30 1978-06-30 Action monitor display circuit for digital afc or fc device

Publications (1)

Publication Number Publication Date
JPS556954A true JPS556954A (en) 1980-01-18

Family

ID=13689256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7941678A Pending JPS556954A (en) 1978-06-30 1978-06-30 Action monitor display circuit for digital afc or fc device

Country Status (1)

Country Link
JP (1) JPS556954A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280882U (en) * 1988-12-09 1990-06-21
JPH0280883U (en) * 1988-12-09 1990-06-21

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0280882U (en) * 1988-12-09 1990-06-21
JPH0280883U (en) * 1988-12-09 1990-06-21

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