JPS55165017A - Variable equalizing circuit - Google Patents
Variable equalizing circuitInfo
- 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
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.
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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63152590U (en) * | 1987-03-26 | 1988-10-06 | ||
JPH0719029Y2 (en) * | 1991-03-28 | 1995-05-01 | リズム時計工業株式会社 | Movement mounting structure |
-
1979
- 1979-06-12 JP JP7301379A patent/JPS55165017A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6154289B2 (en) | 1986-11-21 |
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