CN2081615U - Telephone dial pulse receiver - Google Patents
Telephone dial pulse receiver Download PDFInfo
- Publication number
- CN2081615U CN2081615U CN 90220504 CN90220504U CN2081615U CN 2081615 U CN2081615 U CN 2081615U CN 90220504 CN90220504 CN 90220504 CN 90220504 U CN90220504 U CN 90220504U CN 2081615 U CN2081615 U CN 2081615U
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- CN
- China
- Prior art keywords
- signal
- dial pulse
- telephone
- pulse receiver
- telephone dial
- 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.)
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 230000005236 sound signal Effects 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a telephone dial pulse receiver through a telephone network. The telephone dial pulse receiver comprises a hybrid coil or a signal separator, a synchronous detector and a shaping and filtering circuit. The utlity model has the principle that the phase position and the magnitude of returned signals are detected by emitting an audio signal, and the received pulse signals are obtained by filtering and shaping. The telephone dial pulse receiver can accurately receive the dial pulse through various switching networks. The telephone dial pulse receiver can be used as the interfaces of private branch exchangers to realize the direct dial function and replace the manual partial transit working. The telephone dial pulse receiver can also be used for multi-function telephone sets to realize the remote control function.
Description
The utility model relates to the receiving system of dialing pulse by switching network, specifically adopts and sends an audio signal, detects the modulated inverse signal that receives simultaneously, accomplishes to receive exactly.
The dial impulse that phone uses in the prior art is the interrupting pulse about 10Hz or 20Hz, and this signal is decayed very big behind the switched telephone network that by passband is 300～3400Hz, can not be received reliably.Existing two kinds of dial impulse receiving systems: a kind of is to detect dial impulse that decayed behind telephone network, distortion, amplifies shaping then, makes it to recover former dial impulse; Another kind is to utilize microprocessor and Digital Signal Processing, to signal amplification, sampling, analog to digital conversion and the Digital Signal Processing that receives, accomplishes to receive more accurately.Preceding a kind of circuit is simple, and reliability is not high; Though the back is a kind of more accurate, software and hardware is all very complicated, and the cost height is so all fail to accomplish practicality.
The purpose of this utility model is to overcome above-mentioned shortcoming of the prior art, provides a kind of circuit the not only simple but also reliable receiving system of dialing pulse behind switching network.
The utility model is to realize like this, one audio-frequency electric potential source is set sends audio signal, utilize the conversion of two/four lines the transmission signal to be separated with inverse signal with hybrid coil, and detect the amplitude and the phase change of inverse signal with synchronous detector, through filtering and shaping, obtain passing through accurately the dial impulse signal of switched telephone network then.Sending signal can also separate by the circuit that integrated operational amplifier is formed with inverse signal.
Drawing of the present utility model is described as follows:
Fig. 1 is the block diagram of receiving system
Fig. 2 is for adopting the dialing reception of impulse device circuit figure of integrated operational amplifier
Fig. 3 is the dialing reception of impulse manipulated or operated apparatus with hybrid coil and analog multiplier
Elaborate below in conjunction with accompanying drawing and embodiment of the present utility model.
Fig. 1 expresses block diagram of the present utility model, U is the audio-frequency electric potential source among the figure, (1) is hybrid coil or demultiplexer, (2) finish synchronous detection for synchronous detector by (1) isolated inverse signal, (3) be shaping and filter circuit, (4) expression connects to user or trunk line, and (5) are output.
Fig. 2 is first embodiment, is the embodiment that adopts integrated operational amplifier and analog switch wave detector.IC1-A amplifies audio signal, through R
5Send with isolating transformer.IC1-B obtains the square wave of synchronous homophase to the audio signal shaping that IC1-A amplifies, and as the control signal of analog switch IC2-A, is used to finish synchronous detection.IC1-C constitutes differential amplifier, and when Circuit Matching, IC1-C imports two signal subtractions, and the output audio signal amplitude is very little; During mismatch, output amplitude is very big.R
13, R
14, C
6Form filter circuit, to the signal filtering of synchronous detection.The signal of IC1-D after to detection amplifies.C
8, D
3Constitute clamp circuit, make transistor T
1Be on off state, the pulse signal that output receives.IC1 adopts LM324, and IC2 is CD4066, and T1 is CS9014, D
1D
2D
3Be IN4148.V
DDFor+12V, V
SSBe OV.
Fig. 3 is second embodiment, is the embodiment that adopts analog multiplier and hybrid coil.IC1-A amplifies audio signal through C
2Be added on the hybrid coil B, by a termination relaying isolating transformer of (4).The signal that returns is coupled to another winding by B, through C
4Input IC2, IC2 is four-quadrant analog multiplier MC1494L.The output of IC1-A simultaneously is added to 9 pin of input in addition of multiplier, and the signal that the returns result of signal multiplication is therewith exported by 14 pin, amplifies C through IC1-B
6, D
1Clamp is by transistor T
1Output pulse signal.IC1 LM358, D
1Adopt 1N4148.
The utility model can be used for the trunk interface of small program-control exchanger, so that the function of direct dialing in extension set (secondary directly pulls out) to be provided, can to save the outside line human relay working of switch or reduce operator's workload.The utility model also can be used for multi-function telephones, and as telegraphone, or certain is connected on the control device on the telephone wire, and the user can carry out remote control by switched telephone network.
Claims (3)
1, a kind of dialing pulse is by the receiving system of switched telephone network, it is characterized in that being provided with an audio-frequency electric potential source and send audio signal, utilize the conversion of two/four lines the transmission signal to be separated with inverse signal with hybrid coil, detect the amplitude and the phase change of inverse signal through synchronous detector, and then handle the dial impulse signal that obtains accurately by switched telephone network through filtering and shaping.
2, dialing reception of impulse device according to claim 1 is characterized in that sending signal and can also separate by the circuit that integrated operational amplifier is formed with inverse signal.
3, dialing reception of impulse device according to claim 1 is characterized in that synchronous detector can be an analog multiplier, also the switching detection device that can be made up of analog switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90220504 CN2081615U (en) | 1990-09-18 | 1990-09-18 | Telephone dial pulse receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90220504 CN2081615U (en) | 1990-09-18 | 1990-09-18 | Telephone dial pulse receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2081615U true CN2081615U (en) | 1991-07-24 |
Family
ID=4898923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90220504 Withdrawn CN2081615U (en) | 1990-09-18 | 1990-09-18 | Telephone dial pulse receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2081615U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490484C (en) * | 2002-12-26 | 2009-05-20 | 冲电气工业株式会社 | voice communication system |
| CN100576865C (en) * | 2002-12-26 | 2009-12-30 | 冲电气工业株式会社 | Be suitable for the voice communication system and the telephone set thereof of broadband connections |
-
1990
- 1990-09-18 CN CN 90220504 patent/CN2081615U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100490484C (en) * | 2002-12-26 | 2009-05-20 | 冲电气工业株式会社 | voice communication system |
| CN100576865C (en) * | 2002-12-26 | 2009-12-30 | 冲电气工业株式会社 | Be suitable for the voice communication system and the telephone set thereof of broadband connections |
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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 |