JPS55165017A - Variable equalizing circuit - Google Patents

Variable equalizing circuit

Info

Publication number
JPS55165017A
JPS55165017A JP7301379A JP7301379A JPS55165017A JP S55165017 A JPS55165017 A JP S55165017A JP 7301379 A JP7301379 A JP 7301379A JP 7301379 A JP7301379 A JP 7301379A JP S55165017 A JPS55165017 A JP S55165017A
Authority
JP
Japan
Prior art keywords
equalizing
signal
circuit
impedance
collector
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
JP7301379A
Other languages
Japanese (ja)
Other versions
JPS6154289B2 (en
Inventor
Chikao Aoki
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP7301379A priority Critical patent/JPS55165017A/en
Publication of JPS55165017A publication Critical patent/JPS55165017A/en
Publication of JPS6154289B2 publication Critical patent/JPS6154289B2/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
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To obtain the broad band equalizing circuit for stable operation, by connecting the first impedance for equalizing, variable resistor, and the second impedance for equalizing respectively to the emitter of the first and the second transistors, and adding the signals from both the transistors. CONSTITUTION:The first impedance Z1 to equalize the cable transmission characteristics and variable resistor r4 are connected to the emitter of the first TRQ1, and the resistor R1 is connected to the collector, and the signal obtained from the connecting point 7 between Z1 and r4 is input to the addition circuit 3. The signal from the collector of TRQ1 is fed to the base of the second TRQ2. The second impedance Z2 equalizing the transmission characteristics is connected to the emitter of TRQ2 and the resistor R2 is connected to the collector, and the signal from the collector connection point 8 of TRQ2 is input to the circuit 3. The circuit 3 matches the signal from the connection points 7 and 8 in the same phase and the signal added is output to the terminal 9. The conditions given to the frequency transmission characteristics are determined with the value of the resistor r4 and when R1R2/Z1Z2 at r4=0, is set so that it equalizes the value at the maximum loss of cable, stable equalizing circuit over wide frequency band can be obtained.
JP7301379A 1979-06-12 1979-06-12 Variable equalizing circuit Granted JPS55165017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7301379A JPS55165017A (en) 1979-06-12 1979-06-12 Variable equalizing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7301379A JPS55165017A (en) 1979-06-12 1979-06-12 Variable equalizing circuit

Publications (2)

Publication Number Publication Date
JPS55165017A true JPS55165017A (en) 1980-12-23
JPS6154289B2 JPS6154289B2 (en) 1986-11-21

Family

ID=13506019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7301379A Granted JPS55165017A (en) 1979-06-12 1979-06-12 Variable equalizing circuit

Country Status (1)

Country Link
JP (1) JPS55165017A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63152590U (en) * 1987-03-26 1988-10-06

Also Published As

Publication number Publication date
JPS6154289B2 (en) 1986-11-21

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