JPS56117432A - Reception detecting circuit - Google Patents

Reception detecting circuit

Info

Publication number
JPS56117432A
JPS56117432A JP2012080A JP2012080A JPS56117432A JP S56117432 A JPS56117432 A JP S56117432A JP 2012080 A JP2012080 A JP 2012080A JP 2012080 A JP2012080 A JP 2012080A JP S56117432 A JPS56117432 A JP S56117432A
Authority
JP
Japan
Prior art keywords
circuit
output
reference voltage
band
comparator
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
JP2012080A
Other languages
Japanese (ja)
Inventor
Hidekazu Ishii
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 JP2012080A priority Critical patent/JPS56117432A/en
Publication of JPS56117432A publication Critical patent/JPS56117432A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To secure a band muting with a required wide width and a reception state detection output with a sufficiently small band width respectively, by providing two outputs that detect a tuning shift with an FM band rectifying circuit. CONSTITUTION:The FM detection output supplied from the receiving circuit 2 is extracted for its DC component through the FM band rectifying circuit 6 and then compared with the reference voltage given from the 1st reference voltage source 7 through the 1st comparator 8. When the output of the circuit 6 is lower than the reference voltage, the signal is applied to the switch circuit 4 from the 1st AND circuit 10 to perform a muting action. At the same time, the output of the circuit 6 is compared with the reference voltage of the 2nd reference voltage source 12 through the 2nd comparator 13. And the fact that the output of the circuit 6 is lower than the reference voltage is detected, and then the AND output of the output of the circuit 6 and the output of the signal level detecting circuit 9 is obtained through the 2nd AND circuit 14 to be extracted to the reception detecting output terminal 11.
JP2012080A 1980-02-20 1980-02-20 Reception detecting circuit Pending JPS56117432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012080A JPS56117432A (en) 1980-02-20 1980-02-20 Reception detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012080A JPS56117432A (en) 1980-02-20 1980-02-20 Reception detecting circuit

Publications (1)

Publication Number Publication Date
JPS56117432A true JPS56117432A (en) 1981-09-14

Family

ID=12018254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012080A Pending JPS56117432A (en) 1980-02-20 1980-02-20 Reception detecting circuit

Country Status (1)

Country Link
JP (1) JPS56117432A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235488A (en) * 1975-09-09 1977-03-18 Carba Sa Device for automatically measuring arterial pressure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235488A (en) * 1975-09-09 1977-03-18 Carba Sa Device for automatically measuring arterial pressure

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