CN2048650U - Two-way amplifier communication signal - Google Patents
Two-way amplifier communication signal Download PDFInfo
- Publication number
- CN2048650U CN2048650U CN 89202211 CN89202211U CN2048650U CN 2048650 U CN2048650 U CN 2048650U CN 89202211 CN89202211 CN 89202211 CN 89202211 U CN89202211 U CN 89202211U CN 2048650 U CN2048650 U CN 2048650U
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- China
- Prior art keywords
- amplifier
- way amplifier
- way
- communication signal
- signal
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Abstract
The utility model provides a two-way amplifier communication signal applied to communication system. By that the principle of common-mode rejection is utilized, the two-way amplifier communication signal comprises two sets of operational amplifiers and associated circuits. By that the two-way amplifier communication signal is used, two ways of signals transmitted in opposite directions can be respectively magnified in a pair of transmission lines, and the respective magnification can be same or different. The two-way amplifier communication signal can be widely applied in an all-electronic exchanger, a semi-electronic exchanger and other communication equipment.
Description
The utility model belongs to communication technical field.
In telephone switching system, the signal of telecommunication of receiving both direction is sent out in having of transmitting in the transmission line.According to the level requirement of relevant devices in the system, need number amplify adjustment respectively to sending out to collect mail to send out collecting mail number.Existing various electric signal amplifier all is unidirectional amplifiers, and signal can only be from wherein end input, and amplifying signal is exported from the other end.Directly utilize this kind amplifier can not satisfy the requirement of in the telephone line signal of telecommunication being carried out two-way amplification.Therefore in all communication equipments, need carry out two-way signaling when amplifying, generally all adopt the conversion of two/four lines, the circuit of a pair of transmission two-way signaling, convert to two pairs respectively transmission send out the one-way line of the collection of letters number.Two amplifiers are set on request sending out on the revenue and expenditure road respectively then, as shown in Figure 1, realize number carrying out two-way amplification sending out to collect mail.Because two/four line change-over circuit more complicated, and volume weight is all bigger, can not adopt in some occasion.
The purpose of this utility model is to provide a kind of two line loops that can be directly used in, the signal of telecommunication two-way amplifier that has two-way signal of telecommunication amplifying power simultaneously.
Specifically introduce the utility model below in conjunction with embodiment.
As shown in Figure 2,, will inevitably in circuit, produce vibration, form an oscillating circuit, and not reach the purpose that constitutes a two-way amplifier if simply two common unidirectional amplifier reverse parallel connections are connected together.But utilize the common mode inhibition principle of operational amplifier,, then can cooperate other circuit element, make one and can finish two-way enlarging function and do not produce the practical signal of telecommunication two-way amplifier of vibration by two operational amplifiers by circuit design.The embodiment of this two-way amplifier as shown in Figure 3.Include two groups of operational amplifiers and other resistive element among the figure, wherein 1-1,2-2 end is the signal input output end of two-way amplifier.Hold the signal of telecommunication of input through operational amplifier A by 1-1
1After the amplification, at A
1Output by the resistance parallel branch, output signal balance ground is divided into two-way, this two branch road will be by A
1The identical signal of telecommunication of output is added in operational amplifier A evenly
2Forward and reverse input end; Simultaneously from wherein drawing a signal line a branch road, will be by A
1Amplifying signal is linked to amplifier signal input and output 2-2 end.Because amplifier A
2From A
1What obtain is common-mode signal, so A
1Output signal can not pass through A again
2Turn back to the 1-1 end.Import through A from the 2-2 end
2Amplify the signal of back by the output of 1-1 end, its operation principle and process and top identical, the difference part only is at amplifier A
2Resistance value on the balance branch road in parallel that output connect, and A
2Feedback resistance R
F2, can with amplifier A
1Difference, thereby A
2With A
1Multiplication factor can be different, so the signal that this amplifier is imported for 1-1 end and 2-2 end can amplify respectively with different multiplication factors as required.
In practicality according to the different condition requirement, can be with the resistance branch in the foregoing circuit, change and be capacitance-resistance branch road or other branch road, unique restriction is that its parallel branch of requirement remains balance, still can be with the output signal of an amplifier, the forward and reverse input that is added in another amplifier of complete equipilibrium.According to a kind of thick film mixing aggregate circuit that scheme shown in the accompanying drawing 3 is made, its external form as shown in Figure 4.
Among Fig. 4: 1,2 pin are the 1-1 end, and 3 pin are additional power source V
E, 4 pin are ground, 5 pin meet additional power source V
C, 6,7 pin are 2-2 end, wherein input/output terminal 2,7 pin ground connection.
The key technical indexes of this two-way amplifier is:
1, working power: duplicate supply: ± 5 ν～± 18 ν
2, dynamic range: the working power height, dynamic range is big, works as V
C=7V,
V
EDuring=-7V, undistorted being output as+5dBm.
3, voltage amplification factor scope :-5dB～+ 15dB, the multiplication factor of both direction can equate or not wait.
4, frequency characteristic: depend primarily on operational amplifier itself, the smooth ripple disable of amplitude frequency curve in 300Hg～3400Hg in the speech circuit.
This signal of telecommunication two-way amplifier that the utility model provides can be widely used in all-electronin, semielectronic exchange and other communication equipment.
Claims (1)
1, a kind of signal of telecommunication two-way amplifier that constitutes by operational amplifier and impedance component, it is characterized in that this two-way amplifier comprises two groups of operational amplifiers, wherein the output of each group amplifier is through the forward and the reverse input end of receiving another group amplifier of parallel impedance circuit balancing separately; Respectively draw an end line from the parallel impedance circuit of two groups of amplifiers simultaneously, as the signal input-output line of this two-way amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202211 CN2048650U (en) | 1989-03-06 | 1989-03-06 | Two-way amplifier communication signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202211 CN2048650U (en) | 1989-03-06 | 1989-03-06 | Two-way amplifier communication signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2048650U true CN2048650U (en) | 1989-11-29 |
Family
ID=4859992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202211 Withdrawn CN2048650U (en) | 1989-03-06 | 1989-03-06 | Two-way amplifier communication signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2048650U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151798B (en) * | 2005-05-23 | 2010-05-19 | 株式会社日立国际电气 | Amplifier apparatus |
| CN101507110B (en) * | 2006-08-28 | 2012-07-04 | 艾利森电话股份有限公司 | Switch-less bidirectional amplifier |
| CN104869343A (en) * | 2014-02-25 | 2015-08-26 | 宏正自动科技股份有限公司 | Bidirectional transmission device |
-
1989
- 1989-03-06 CN CN 89202211 patent/CN2048650U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101151798B (en) * | 2005-05-23 | 2010-05-19 | 株式会社日立国际电气 | Amplifier apparatus |
| CN101507110B (en) * | 2006-08-28 | 2012-07-04 | 艾利森电话股份有限公司 | Switch-less bidirectional amplifier |
| CN104869343A (en) * | 2014-02-25 | 2015-08-26 | 宏正自动科技股份有限公司 | Bidirectional transmission device |
| CN104869343B (en) * | 2014-02-25 | 2018-02-02 | 宏正自动科技股份有限公司 | Bidirectional transmission device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |