JPS5484951A - Variable attenuation equalizer - Google Patents

Variable attenuation equalizer

Info

Publication number
JPS5484951A
JPS5484951A JP15245877A JP15245877A JPS5484951A JP S5484951 A JPS5484951 A JP S5484951A JP 15245877 A JP15245877 A JP 15245877A JP 15245877 A JP15245877 A JP 15245877A JP S5484951 A JPS5484951 A JP S5484951A
Authority
JP
Japan
Prior art keywords
varying
variable
output
attenuation
performance
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
JP15245877A
Other languages
Japanese (ja)
Inventor
Kenji Nakayama
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15245877A priority Critical patent/JPS5484951A/en
Publication of JPS5484951A publication Critical patent/JPS5484951A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PURPOSE:To increase the quality of delivery signal, by varying the parameter determining the performance of the variable attenuation equalizer independently in the sample system filter, and making equivalent the frequency versus attenuation performance at the signal band of sample system in good manner. CONSTITUTION:The unit provides a plurality of basic blocks 10-1 and 10-2 connecting the dalay unit 2-1 and the multiplier 3 in series with the input and output IN and OUT and connecting the output of other dalay line 2-2 at the output of the delay unit 2-1 so that it is fed back to the input, first and second adders 11, and 12 placed at the input and output, and a plurality of variable coefficient multipliers 15-1 and 15-2 varying the maximum attenuation. Further, the variable coefficient multiplier 14 varying the half value and the variable coefficient multiplier 13 varying the center frequency giving the maximum attenuation or the hal value constitute the variable attenuation equalizer. Further, connection is made so that the parameter determining the performance of the variable attenuation equalizer can be varied independently.
JP15245877A 1977-12-20 1977-12-20 Variable attenuation equalizer Pending JPS5484951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15245877A JPS5484951A (en) 1977-12-20 1977-12-20 Variable attenuation equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15245877A JPS5484951A (en) 1977-12-20 1977-12-20 Variable attenuation equalizer

Publications (1)

Publication Number Publication Date
JPS5484951A true JPS5484951A (en) 1979-07-06

Family

ID=15540948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15245877A Pending JPS5484951A (en) 1977-12-20 1977-12-20 Variable attenuation equalizer

Country Status (1)

Country Link
JP (1) JPS5484951A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142021A (en) * 1981-02-27 1982-09-02 Victor Co Of Japan Ltd Characteristic controlling system for digital equalizer
JPS60198911A (en) * 1984-03-22 1985-10-08 Sony Corp Digital filter device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57142021A (en) * 1981-02-27 1982-09-02 Victor Co Of Japan Ltd Characteristic controlling system for digital equalizer
JPS60198911A (en) * 1984-03-22 1985-10-08 Sony Corp Digital filter device

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