JPS56122219A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS56122219A
JPS56122219A JP2478980A JP2478980A JPS56122219A JP S56122219 A JPS56122219 A JP S56122219A JP 2478980 A JP2478980 A JP 2478980A JP 2478980 A JP2478980 A JP 2478980A JP S56122219 A JPS56122219 A JP S56122219A
Authority
JP
Japan
Prior art keywords
signal
circuit
pulse duration
output
error signal
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
JP2478980A
Other languages
Japanese (ja)
Inventor
Takayuki Ogura
Tetsumasa Ooyama
Akihiko Takada
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 JP2478980A priority Critical patent/JPS56122219A/en
Publication of JPS56122219A publication Critical patent/JPS56122219A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure

Landscapes

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

Abstract

PURPOSE:To increase the converging speed and the stability after convergence with no increment of the hard quantity for an FIA-type automatic equalizer, by controlling the amount of an integration in accordance with the size of the error signal. CONSTITUTION:The error signal ek delivered from the subtractor 5 is identified by the identifier 21 and then catches the code to produce sgnek. The delay line 6 with tap produces the signals sgnrk-N-sgnrkn, and these signals are multiplied by the signal sgnek at the multipliers 7-n...70...7N to produce the signal that shows a code (+ or -or o). On the other hand, the error signal ek is converted into a pulse duration signal through the level/pulse duration converting circuit 22. This pulse duration signal is applied to the AND circuit 230 and the NAND circuit 240 that are shown as the examples for the tap O, and then varies the width of the output signal of the multiplier 70. An integrator consisting of the diodes 250 and 260, the resistance 270, the amplifier 280 and the capacitor 290, each is actuated by the positive output pulse of the circuit 230 and the negative output pulse of the circuit 240. Thus a change is caused to the output of the integrator in accordance with the size of the signal ek.
JP2478980A 1980-02-29 1980-02-29 Automatic equalizer Pending JPS56122219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2478980A JPS56122219A (en) 1980-02-29 1980-02-29 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2478980A JPS56122219A (en) 1980-02-29 1980-02-29 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS56122219A true JPS56122219A (en) 1981-09-25

Family

ID=12147944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2478980A Pending JPS56122219A (en) 1980-02-29 1980-02-29 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS56122219A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617735A (en) * 1984-06-22 1986-01-14 Fujitsu Ltd Equalizing mode controlling method of automatic equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS617735A (en) * 1984-06-22 1986-01-14 Fujitsu Ltd Equalizing mode controlling method of automatic equalizer

Similar Documents

Publication Publication Date Title
JPS57171868A (en) Waveform shaping circuit
JPS56166620A (en) Automatic equalizer
JPS56122219A (en) Automatic equalizer
JPS5437449A (en) Automatic gain control circuit
JPS5624521A (en) Method and device for converting function for hot-wire type flowmeter
JPS57196641A (en) Click eliminating system
JPS57179979A (en) Clock signal generating circuit
JPS55417A (en) Frequency comparator circuit
JPS55160803A (en) Automatic gain control circuit
JPS57152720A (en) Digital filter with agc
JPS56158538A (en) Automatic equalizer
JPS5556252A (en) Digital differential analyzer
JPS57162821A (en) Data mode converging system
JPS5654131A (en) Automatic equalizer
JPS56103766A (en) Integrating circuit
JPS5745603A (en) Controller
JPS5795728A (en) Impulse noise eliminating device
JPS573419A (en) Phase comparator
JPS53103350A (en) Digital filter
JPS54154242A (en) Weighting coefficient generating circuit
JPS5724113A (en) Digital filter device
JPS5665508A (en) Current-voltage conversion circuit
JPS57104310A (en) Sound circuit
JPS54134545A (en) Pulse generator circuit
JPS57103422A (en) Automatic equalizer