JPS5271907A - Tone signal detector - Google Patents

Tone signal detector

Info

Publication number
JPS5271907A
JPS5271907A JP50148206A JP14820675A JPS5271907A JP S5271907 A JPS5271907 A JP S5271907A JP 50148206 A JP50148206 A JP 50148206A JP 14820675 A JP14820675 A JP 14820675A JP S5271907 A JPS5271907 A JP S5271907A
Authority
JP
Japan
Prior art keywords
tone signal
signal detector
bpf
ensure
reducing
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
JP50148206A
Other languages
Japanese (ja)
Inventor
Tatsuyuki Hori
Koji Nakabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50148206A priority Critical patent/JPS5271907A/en
Publication of JPS5271907A publication Critical patent/JPS5271907A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency

Abstract

PURPOSE:To ensure the detection of tone signal row by reducing the fall time of ton tone signal detecting BPF.
JP50148206A 1975-12-11 1975-12-11 Tone signal detector Pending JPS5271907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50148206A JPS5271907A (en) 1975-12-11 1975-12-11 Tone signal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50148206A JPS5271907A (en) 1975-12-11 1975-12-11 Tone signal detector

Publications (1)

Publication Number Publication Date
JPS5271907A true JPS5271907A (en) 1977-06-15

Family

ID=15447620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50148206A Pending JPS5271907A (en) 1975-12-11 1975-12-11 Tone signal detector

Country Status (1)

Country Link
JP (1) JPS5271907A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5433601A (en) * 1977-08-22 1979-03-12 Kokusai Electric Co Ltd Selective calling circuit
JPS5542486A (en) * 1978-09-21 1980-03-25 Matsushita Electric Ind Co Ltd Band-pass filter
GB2434431B (en) * 2006-01-20 2011-05-04 Darren John Bailey A camouflaged article

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4816736B1 (en) * 1969-04-26 1973-05-24
JPS50119510A (en) * 1974-03-04 1975-09-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4816736B1 (en) * 1969-04-26 1973-05-24
JPS50119510A (en) * 1974-03-04 1975-09-19

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5433601A (en) * 1977-08-22 1979-03-12 Kokusai Electric Co Ltd Selective calling circuit
JPS58717B2 (en) * 1977-08-22 1983-01-07 株式会社日立国際電気 selective call circuit
JPS5542486A (en) * 1978-09-21 1980-03-25 Matsushita Electric Ind Co Ltd Band-pass filter
GB2434431B (en) * 2006-01-20 2011-05-04 Darren John Bailey A camouflaged article

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