JPS5379307A - Mixed signal receiver - Google Patents

Mixed signal receiver

Info

Publication number
JPS5379307A
JPS5379307A JP15485176A JP15485176A JPS5379307A JP S5379307 A JPS5379307 A JP S5379307A JP 15485176 A JP15485176 A JP 15485176A JP 15485176 A JP15485176 A JP 15485176A JP S5379307 A JPS5379307 A JP S5379307A
Authority
JP
Japan
Prior art keywords
signal receiver
mixed signal
sound
push
detected
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
JP15485176A
Other languages
Japanese (ja)
Inventor
Akira Ichikawa
Eiji Ohira
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15485176A priority Critical patent/JPS5379307A/en
Publication of JPS5379307A publication Critical patent/JPS5379307A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To obtain a frequency signal receiver by which a push-button signal buried in sound can be detected and received.
JP15485176A 1976-12-24 1976-12-24 Mixed signal receiver Pending JPS5379307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15485176A JPS5379307A (en) 1976-12-24 1976-12-24 Mixed signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15485176A JPS5379307A (en) 1976-12-24 1976-12-24 Mixed signal receiver

Publications (1)

Publication Number Publication Date
JPS5379307A true JPS5379307A (en) 1978-07-13

Family

ID=15593280

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15485176A Pending JPS5379307A (en) 1976-12-24 1976-12-24 Mixed signal receiver

Country Status (1)

Country Link
JP (1) JPS5379307A (en)

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