JPS558168A - Signal identification circuit - Google Patents

Signal identification circuit

Info

Publication number
JPS558168A
JPS558168A JP8153978A JP8153978A JPS558168A JP S558168 A JPS558168 A JP S558168A JP 8153978 A JP8153978 A JP 8153978A JP 8153978 A JP8153978 A JP 8153978A JP S558168 A JPS558168 A JP S558168A
Authority
JP
Japan
Prior art keywords
frequency
signal
featuring
value
carrier wave
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
JP8153978A
Other languages
Japanese (ja)
Inventor
Toyotaka Machida
Kenji Kaneko
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP8153978A priority Critical patent/JPS558168A/en
Publication of JPS558168A publication Critical patent/JPS558168A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Receiver Circuits (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE: To facilitate an easy selection of the frequency by giving N-multiplication to the frequency value of the signal obtained by demodulating the modulated wave received and then drawing out the difference to the frequency of the carrier wave.
CONSTITUTION: Carrier wave sO featuring specific frequency value fO is amplitude- modulated and then transmitted with one signal selected among signals si of plural value featuring different frequencies used as the modulated wave. Then the frequency value fi is N-multiplied via frequency multiplying circuit 4 for signal si obtained by receiving the modulated wave and then demodulating it through demodulator 3. At the same time, the signal featuring the difference between frequency N.fi and frequency fO of carrier wave sO is obtained through signal process circuit 6. This signal can be selected easily via frequency selection circuits 7a∼7n. As a result, the signals can be identified satisfactorily even through the frequency selection circuit featuring a comparatively wide pass band.
COPYRIGHT: (C)1980,JPO&Japio
JP8153978A 1978-07-05 1978-07-05 Signal identification circuit Pending JPS558168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8153978A JPS558168A (en) 1978-07-05 1978-07-05 Signal identification circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8153978A JPS558168A (en) 1978-07-05 1978-07-05 Signal identification circuit

Publications (1)

Publication Number Publication Date
JPS558168A true JPS558168A (en) 1980-01-21

Family

ID=13749095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8153978A Pending JPS558168A (en) 1978-07-05 1978-07-05 Signal identification circuit

Country Status (1)

Country Link
JP (1) JPS558168A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130660A (en) * 1973-04-14 1974-12-14
JPS526563A (en) * 1975-07-04 1977-01-19 Toshiba Corp Electronic clock with luminous bodies

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130660A (en) * 1973-04-14 1974-12-14
JPS526563A (en) * 1975-07-04 1977-01-19 Toshiba Corp Electronic clock with luminous bodies

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