JPS5582548A - Detection circuit of out of synchronism - Google Patents

Detection circuit of out of synchronism

Info

Publication number
JPS5582548A
JPS5582548A JP15575078A JP15575078A JPS5582548A JP S5582548 A JPS5582548 A JP S5582548A JP 15575078 A JP15575078 A JP 15575078A JP 15575078 A JP15575078 A JP 15575078A JP S5582548 A JPS5582548 A JP S5582548A
Authority
JP
Japan
Prior art keywords
synchronism
output
circuit
detection
detection circuit
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
JP15575078A
Other languages
Japanese (ja)
Inventor
Yasuyuki Horimuki
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP15575078A priority Critical patent/JPS5582548A/en
Publication of JPS5582548A publication Critical patent/JPS5582548A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/14—Automatic detuning arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To increase the detection accuracy at out of synchronism by comparing the output voltage at synchronism and out of synchronism for AFC circuit and detecting the output of out of synchronism for AFC circuit. CONSTITUTION:The output voltage E from LPF3 is inputted to the first and the second comparators 11, 13 and it is compared with the voltages E1,E2 of the reference voltage sources 12, 13. When the synchronism of AFC is out, rectangular signal is outputted from the comparators 11, 13 respectively. This signal is inputted respectively to the logical sum circuit 15, the output activates the relay 16 to close the contact 17, and the detection output at out of synchronism is delivered from the output terminal 10. Accordingly, the accuracy of the detection circuit is increased and the setting of the detection circuit can be much simplified only with the setting of the reference levels E1 and E2.
JP15575078A 1978-12-19 1978-12-19 Detection circuit of out of synchronism Pending JPS5582548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15575078A JPS5582548A (en) 1978-12-19 1978-12-19 Detection circuit of out of synchronism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15575078A JPS5582548A (en) 1978-12-19 1978-12-19 Detection circuit of out of synchronism

Publications (1)

Publication Number Publication Date
JPS5582548A true JPS5582548A (en) 1980-06-21

Family

ID=15612594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15575078A Pending JPS5582548A (en) 1978-12-19 1978-12-19 Detection circuit of out of synchronism

Country Status (1)

Country Link
JP (1) JPS5582548A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182031A (en) * 1989-01-09 1990-07-16 Ricoh Co Ltd Unlock detection method for pll circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182031A (en) * 1989-01-09 1990-07-16 Ricoh Co Ltd Unlock detection method for pll circuit

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