JPS5550765A - Digital signal receiver - Google Patents

Digital signal receiver

Info

Publication number
JPS5550765A
JPS5550765A JP12339978A JP12339978A JPS5550765A JP S5550765 A JPS5550765 A JP S5550765A JP 12339978 A JP12339978 A JP 12339978A JP 12339978 A JP12339978 A JP 12339978A JP S5550765 A JPS5550765 A JP S5550765A
Authority
JP
Japan
Prior art keywords
signal
inputted
circuit
memory circuit
output
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
JP12339978A
Other languages
Japanese (ja)
Other versions
JPS5831139B2 (en
Inventor
Hitoshi Imagawa
Masao Iida
Koichi Hasegawa
Kojiro Sakurai
Takaaki Osaki
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP53123399A priority Critical patent/JPS5831139B2/en
Publication of JPS5550765A publication Critical patent/JPS5550765A/en
Publication of JPS5831139B2 publication Critical patent/JPS5831139B2/en
Expired 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
    • H04Q1/4575—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 which are transmitted in digital form

Abstract

PURPOSE:To enhance the flexibility and the economic property by commonly employing the receiver by providing a digital filter, a coefficient value memory circuit and a control signal memory circuit in receiving the multifrequency MF and a push button PB signal. CONSTITUTION:The signal compressed to PCM is inputted to the filter portion 42 comprising a register and a digital filter through an expander 41. This output is inputted through the demultiplexer 43 through which MF signal is inputted to the multiplexer 47 and the PB signal is inputted to the multiplexer 47 through the limitter 45 and the output thereof is inputted to the filter portion 50. The output of the filter portion 50 is inputted to the comparison circuit 51. MF signal is compared with the signal from the variable threshold value circuit 53 and the PB signal is compared with the signal from the threshold value generating circuit 55 and they are outputted through the memory circuit 59. The coefficient value of the filter portions 42, 50 is generated from the memory circuits 61, 62 and the timing and control signals to the respective circuits are generated from the memory circuit 30. By changing the contents of the circuits 61, 62, 30, the one hardware can constitutes 1 number of PB receivers and m number of MF receivers in function.
JP53123399A 1978-10-06 1978-10-06 digital signal receiver Expired JPS5831139B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53123399A JPS5831139B2 (en) 1978-10-06 1978-10-06 digital signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53123399A JPS5831139B2 (en) 1978-10-06 1978-10-06 digital signal receiver

Publications (2)

Publication Number Publication Date
JPS5550765A true JPS5550765A (en) 1980-04-12
JPS5831139B2 JPS5831139B2 (en) 1983-07-04

Family

ID=14859585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53123399A Expired JPS5831139B2 (en) 1978-10-06 1978-10-06 digital signal receiver

Country Status (1)

Country Link
JP (1) JPS5831139B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051394A (en) * 1983-08-31 1985-03-22 Fujitsu Ltd Composite receiver
JPS6071398U (en) * 1983-10-19 1985-05-20 三菱重工業株式会社 Waste plastic film volume reduction and solidification processing equipment
JPH01137646U (en) * 1988-03-14 1989-09-20
JP2004135309A (en) * 2002-08-28 2004-04-30 Motorola Inc Tone detector and therefor method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115392A (en) * 1974-07-29 1976-02-06 San Bureen Kk KAITENHYOJISOCHI
JPS5328315A (en) * 1976-08-30 1978-03-16 Hitachi Ltd Multi-frequency signal receiver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115392A (en) * 1974-07-29 1976-02-06 San Bureen Kk KAITENHYOJISOCHI
JPS5328315A (en) * 1976-08-30 1978-03-16 Hitachi Ltd Multi-frequency signal receiver

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051394A (en) * 1983-08-31 1985-03-22 Fujitsu Ltd Composite receiver
JPS6071398U (en) * 1983-10-19 1985-05-20 三菱重工業株式会社 Waste plastic film volume reduction and solidification processing equipment
JPH031103Y2 (en) * 1983-10-19 1991-01-14
JPH01137646U (en) * 1988-03-14 1989-09-20
JP2004135309A (en) * 2002-08-28 2004-04-30 Motorola Inc Tone detector and therefor method

Also Published As

Publication number Publication date
JPS5831139B2 (en) 1983-07-04

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