JPS5624897A - Attenuation quantity set system - Google Patents

Attenuation quantity set system

Info

Publication number
JPS5624897A
JPS5624897A JP10017179A JP10017179A JPS5624897A JP S5624897 A JPS5624897 A JP S5624897A JP 10017179 A JP10017179 A JP 10017179A JP 10017179 A JP10017179 A JP 10017179A JP S5624897 A JPS5624897 A JP S5624897A
Authority
JP
Japan
Prior art keywords
attenuation quantity
code sequence
pcm signal
set system
quantity set
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
JP10017179A
Other languages
Japanese (ja)
Inventor
Takeshi Sakai
Shuji Kimura
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP10017179A priority Critical patent/JPS5624897A/en
Publication of JPS5624897A publication Critical patent/JPS5624897A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To digitize all level adjustment in the PCM signal system, by obtain a code sequence, to which a desired attenuation quantity is given, digitally for the input PCM signal. CONSTITUTION:Attenuating circuit 2 receives 8-bit input PCM signal Pin as an address signal and outputs a code sequence which has contents of the value lower than this code sequence by 1dB. Other circuits 3, 4 and 5 are different only in attenuation quantity and are constituted similarly to attenuating circuit 2. As a result, level conversion can be performed very easily in the mode of PCM signals.
JP10017179A 1979-08-08 1979-08-08 Attenuation quantity set system Pending JPS5624897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10017179A JPS5624897A (en) 1979-08-08 1979-08-08 Attenuation quantity set system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10017179A JPS5624897A (en) 1979-08-08 1979-08-08 Attenuation quantity set system

Publications (1)

Publication Number Publication Date
JPS5624897A true JPS5624897A (en) 1981-03-10

Family

ID=14266868

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10017179A Pending JPS5624897A (en) 1979-08-08 1979-08-08 Attenuation quantity set system

Country Status (1)

Country Link
JP (1) JPS5624897A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6324797A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch
JPS6324796A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch
JPS6324795A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6324797A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch
JPS6324796A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch
JPS6324795A (en) * 1986-07-17 1988-02-02 Nitsuko Corp Time division switch

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