JPS5650610A - Balanced variable equalizing circuit - Google Patents

Balanced variable equalizing circuit

Info

Publication number
JPS5650610A
JPS5650610A JP12596079A JP12596079A JPS5650610A JP S5650610 A JPS5650610 A JP S5650610A JP 12596079 A JP12596079 A JP 12596079A JP 12596079 A JP12596079 A JP 12596079A JP S5650610 A JPS5650610 A JP S5650610A
Authority
JP
Japan
Prior art keywords
resistance
circuit
impedance
existence
low
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
JP12596079A
Other languages
Japanese (ja)
Other versions
JPS6226208B2 (en
Inventor
Hitoshi Yoshizawa
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 JP12596079A priority Critical patent/JPS5650610A/en
Publication of JPS5650610A publication Critical patent/JPS5650610A/en
Publication of JPS6226208B2 publication Critical patent/JPS6226208B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To ensure a step-type variable equalizing function for the preequalizer at the input side of the constant resistance, by securing the existence of resistance for the balanced preequalizer giving a variation to the frequency characteristics of the electric communication device although the impedance is low at the connection circuit. CONSTITUTION:In case the resistance value R2 is much larger than R1 and the resistance value (R3+R4) is much larger than R1 respectively, the lowering of the input unmatched attenuation quantity property can be reduced although the impedance is low for both circuit networks Z1 and Z2 owing to existence of the resistance R2 in case a connection is secured for both networks Z1 and Z2 each. At the same time, the reduction of characteristics and be reduced in the same way owing to existence of the resistances R3 and R4 although the impedance is low for the circuit network Z4 in case a connection is secured for the network Z4. As a result, the step-type variable equalizing function can be provided to the preequalizing circuit at the input side of the constant resistance.
JP12596079A 1979-09-29 1979-09-29 Balanced variable equalizing circuit Granted JPS5650610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12596079A JPS5650610A (en) 1979-09-29 1979-09-29 Balanced variable equalizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12596079A JPS5650610A (en) 1979-09-29 1979-09-29 Balanced variable equalizing circuit

Publications (2)

Publication Number Publication Date
JPS5650610A true JPS5650610A (en) 1981-05-07
JPS6226208B2 JPS6226208B2 (en) 1987-06-08

Family

ID=14923227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12596079A Granted JPS5650610A (en) 1979-09-29 1979-09-29 Balanced variable equalizing circuit

Country Status (1)

Country Link
JP (1) JPS5650610A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093878A (en) * 1983-10-28 1985-05-25 Canon Inc Picture reader
JPS6223425A (en) * 1985-07-20 1987-01-31 Kurabo Ind Ltd Apraratus for controlling injection amount of nh3

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093878A (en) * 1983-10-28 1985-05-25 Canon Inc Picture reader
JPH0572789B2 (en) * 1983-10-28 1993-10-13 Canon Kk
JPS6223425A (en) * 1985-07-20 1987-01-31 Kurabo Ind Ltd Apraratus for controlling injection amount of nh3
JPH0155890B2 (en) * 1985-07-20 1989-11-28 Kurashiki Boseki Kk

Also Published As

Publication number Publication date
JPS6226208B2 (en) 1987-06-08

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