JPS5274294A - Signal detecting circuit - Google Patents

Signal detecting circuit

Info

Publication number
JPS5274294A
JPS5274294A JP50151110A JP15111075A JPS5274294A JP S5274294 A JPS5274294 A JP S5274294A JP 50151110 A JP50151110 A JP 50151110A JP 15111075 A JP15111075 A JP 15111075A JP S5274294 A JPS5274294 A JP S5274294A
Authority
JP
Japan
Prior art keywords
signal detecting
detecting circuit
frequency
signals
signal
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
JP50151110A
Other languages
Japanese (ja)
Other versions
JPS595874B2 (en
Inventor
Yoshio Matsuo
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP50151110A priority Critical patent/JPS595874B2/en
Publication of JPS5274294A publication Critical patent/JPS5274294A/en
Publication of JPS595874B2 publication Critical patent/JPS595874B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To detect the presence of signals and their frequency by frequencyconverting frequency-sweep signals as a local signal and combining band-pass filters, delay circuits and signal detecting circuits as specified.
JP50151110A 1975-12-17 1975-12-17 Shingo Kenshiyutsu Cairo Expired JPS595874B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50151110A JPS595874B2 (en) 1975-12-17 1975-12-17 Shingo Kenshiyutsu Cairo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50151110A JPS595874B2 (en) 1975-12-17 1975-12-17 Shingo Kenshiyutsu Cairo

Publications (2)

Publication Number Publication Date
JPS5274294A true JPS5274294A (en) 1977-06-22
JPS595874B2 JPS595874B2 (en) 1984-02-07

Family

ID=15511562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50151110A Expired JPS595874B2 (en) 1975-12-17 1975-12-17 Shingo Kenshiyutsu Cairo

Country Status (1)

Country Link
JP (1) JPS595874B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02278941A (en) * 1989-04-19 1990-11-15 Yamatake Honeywell Co Ltd Base band signal communication equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03120740U (en) * 1990-03-23 1991-12-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02278941A (en) * 1989-04-19 1990-11-15 Yamatake Honeywell Co Ltd Base band signal communication equipment

Also Published As

Publication number Publication date
JPS595874B2 (en) 1984-02-07

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