JPS5767338A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS5767338A
JPS5767338A JP14287880A JP14287880A JPS5767338A JP S5767338 A JPS5767338 A JP S5767338A JP 14287880 A JP14287880 A JP 14287880A JP 14287880 A JP14287880 A JP 14287880A JP S5767338 A JPS5767338 A JP S5767338A
Authority
JP
Japan
Prior art keywords
circuit
output
discriminating
automatic
automatic equalizing
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
JP14287880A
Other languages
Japanese (ja)
Inventor
Fuji Kanemasa
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 JP14287880A priority Critical patent/JPS5767338A/en
Publication of JPS5767338A publication Critical patent/JPS5767338A/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 eliminate a false lead-in, by providing a tank circuit which extracts a Nyquist frequency from the output of an automatic equalizer and by discriminating the output of the tank circuit to reset the tap coefficient of the automatic equalizing circuit to the initial state. CONSTITUTION:A tank circuit 25, which extracts Nyquist frequency components from the output of an automatic equalizing circuit 22, and the first discriminating circuit 23 are connected to the output of the automatic equalizing circuit 22. The second discriminating circuit 26 is connected to the tank circuit 25. The first discriminating circuit 23 discriminates an output A of the automatic equalizing circuit by thresholds 0.5 and -0.5 to lead in stably the automatic equalizing circuit 22. Meanwhile, the tank circuit 25 extracts Nyquist frequency components of the output A of the automatic equalizing circuit 22. They are discriminated by the sencond discriminating circuit 26, and in case of false lead-in, a reset signal is outputted to rest the tap coeficient to the initial state. Thus, a false lead-in is prevented.
JP14287880A 1980-10-15 1980-10-15 Automatic equalizer Pending JPS5767338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14287880A JPS5767338A (en) 1980-10-15 1980-10-15 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14287880A JPS5767338A (en) 1980-10-15 1980-10-15 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS5767338A true JPS5767338A (en) 1982-04-23

Family

ID=15325688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14287880A Pending JPS5767338A (en) 1980-10-15 1980-10-15 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS5767338A (en)

Similar Documents

Publication Publication Date Title
NO146521B (en) PROCEDURE AND DEVICE FOR DETECTING PRESENCE OR REQUIREMENTS OF A VOICE SIGNAL ON A VOICE CHANNEL
JPS55118247A (en) Adaptive type signal
EP0192411A3 (en) Adaptive equalizer
JPS5767338A (en) Automatic equalizer
JPS57119524A (en) Tristate input circuit
JPS5757022A (en) Automatic equalizer
US2629049A (en) Filter
DE3277514D1 (en) Signal receiver and its utilization in a receiving circuit indicating the condition of the connected equipment
JPS5799851A (en) Signal transmission system
US2258966A (en) Control of transmission in two-way signaling systems
SU970711A1 (en) Transmitter-receiver for radio relay line
JPS5779772A (en) Fadar circuit
JPS573440A (en) Adaptive equalizer
JPS566516A (en) Automatic gain control circuit
JPS56117483A (en) Discriminating circuit for receiving system
JPS56102186A (en) Digital transmission system for subscriber's line
US2332494A (en) Signaling system
JPS57109421A (en) Drop-out detecting circuit
JPS5723814A (en) Automatic shift recorder
US1892284A (en) Voice operated circuit
JPS5715538A (en) Automatic equalizing system for line delay distortion
JPS57103480A (en) Video recording and reproducing device
SU585098A1 (en) Receiver for locomotive signaling
JPS57106264A (en) System for data reproducing
JPS57143945A (en) Receiving circuit for burst optical communication