CN107564552A - The interface circuit of voice recorder - Google Patents
The interface circuit of voice recorder Download PDFInfo
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- CN107564552A CN107564552A CN201710716196.8A CN201710716196A CN107564552A CN 107564552 A CN107564552 A CN 107564552A CN 201710716196 A CN201710716196 A CN 201710716196A CN 107564552 A CN107564552 A CN 107564552A
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Abstract
The invention discloses the interface circuit of voice recorder, it is characterised in that：Including socket, loudspeaker, double control switch K, bridge rectifier diode D, voltage-regulator diode D1, resistance R2, R3, R4, R5, electric capacity C1, C2, C3, C4, triode T1 and T2, the port 1 of port 1 and bridge rectifier diode D on the socket connects, the port 3 of port 2 and bridge rectifier diode D on socket connects, bridge rectifier diode D port 2 is sequentially connected in series electric capacity C2 and double control switch K not moved end C, bridge rectifier diode D port 4 is sequentially connected in series resistance R3, triode T1 emitter stage, triode T1 colelctor electrode, triode T2 colelctor electrode, triode T2 emitter stage and resistance R2, resistance R2 is also connected with bridge rectifier diode D port 2；I/O port 1 on described double control switch K moved end a connection loudspeaker, the I/O port 2 on double control switch K not moved end b connection loudspeaker, the I/O port 3 on loudspeaker connect electric capacity C1.For the present invention by above-mentioned principle, circuit reliability is high, and price is low, is alternatively arranged as the interface circuit of automatic telephone inquiry or telephone dialing control system, using flexible.
Description
Technical field
The present invention relates to interface circuit, and in particular to the interface circuit of voice recorder.
Background technology
With digital signal processing chip (DSP) development, encoding and decoding speech technology is increasingly applied to the military, people
With with monitoring etc. field.For speech digit recorder, transport, public security, fire-fighting, telephone service matter also can be widely used in
The numerous areas such as amount supervision.But recorder is generally positioned near working site, if it is to be understood that the working condition of recorder
Or inquiry record data therein, attendant must arrive scene, workload is very big.Recorder can provide long-range phone and look into
Interface is ask, attendant relies on the working condition and data record of the phone can inquiry recorder in hand.System needs only
A telephone number is accounted for, user inputs password under voice message by telephone keypad after connecting phone, can after confirmation
It is whether normal to inquire about the working condition of recorder.The one section of voice that can also be stored to recorder input time is inquired about,
Voice record will play via telephone line.Wherein need to use the high and flexible interface circuit of reliability, and existing electricity
Road can not meet needs.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided the interface circuit of voice recorder, the circuit reliability is high, valency
Lattice are low, are alternatively arranged as the interface circuit of automatic telephone inquiry or telephone dialing control system, using flexible.
To solve above-mentioned technical problem, the present invention uses following technical scheme：The interface circuit of voice recorder, including
Socket, loudspeaker, double control switch K, bridge rectifier diode D, voltage-regulator diode D1, resistance R2, resistance R3, resistance R4, resistance R5,
Electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, triode T1 and triode T2, port 1 and bridge rectifier two on the socket
Pole pipe D port 1 connects, and the port 3 of port 2 and bridge rectifier diode D on socket connects, bridge rectifier diode D's
Port 2 is sequentially connected in series electric capacity C2 and double control switch K not moved end C, bridge rectifier diode D port 4 be sequentially connected in series resistance R3,
Triode T1 emitter stage, triode T1 colelctor electrode, triode T2 colelctor electrode, triode T2 emitter stage and resistance R2,
Resistance R2 is also connected with bridge rectifier diode D port 2；I/O port 1 on described double control switch K moved end a connection loudspeaker,
I/O port 2 on double control switch K not moved end b connection loudspeaker, the I/O port 3 on loudspeaker connect electric capacity C1, electric capacity C1 ground connection；Institute
The triode T2 stated basis set is sequentially connected in series resistance R5 and control signal end, and electricity is connected between triode T1 basis set and colelctor electrode
Hinder R4；Between described bridge rectifier diode D port 4 and signal input part connect electric capacity C3, triode T1 basis set with
Voltage-regulator diode D1 is connected between bridge rectifier diode D port 4, in voltage-regulator diode D1 both ends shunt capacitance C4.
The input exchange signal transmitted for signal input part enters bridge rectifier after first passing through electric capacity C3 filter action
Diode D powers to socket again after AC signal is converted into direct current signal, is used for external electric equipment.Input friendship simultaneously
Signal is flowed after electric capacity C3 filtering, and triode T1 emitter stage is entered after resistance R3 partial pressure；Input exchange signal
The input triode T1 base stage after electric capacity C3 and electric capacity C4 filter action, and voltage-regulator diode D1 setting, then avoid
Ac input signal is directly entered triode T1 and T2 colelctor electrode, damages triode.This circuit passes through a current source simultaneously
Break-make is realized, is provided with interchanger on double control switch K not moved end C, interchanger is sentenced by the DC current on circuit
Disconnected user's plucks receiver-on-hook condition.Resistance R3, R4 and R5 are then to be used for partial pressure, protection triode T1 and T2.When control signal end is
During low level, triode T2 cut-offs, electric current is smaller, in hook state；When control signal end is high level, triode T2 is led
Logical, triode T1 and T2 composition electric current, electric current is larger, and now loudspeaker send sound, phone off-hook, and double control switch K moved end connects
It is connected on not on the C of moved end, loudspeaker stop sounding, are in the double control switch interchanger that moved end C is not set and connect speech channel state.
Output signal on recorder is passed through electricity by this circuit by the way of direct capacitance coupling compared with prior art
Hold C2 and resistance R2 sound is coupled on telephone line, eliminate extra electronic component interference, signal transmission is more stable
Reliably, the circuit reliability it is high, it is cheap and can as automatic telephone inquire about or telephone dialing control system interface electricity
Road, using flexible.Bridging piezo-resistance R1 in addition, has the function that protection against lightning strikes.
Preferably, piezo-resistance R1 also in parallel between described bridge rectifier diode D port 1 and port 3.Bridging pressure
Quick resistance R1, has the function that protection against lightning strikes.
Preferably, described piezo-resistance R1 pressure sensitive voltage is 150V.
Preferably, described resistance R2 and triode T2 common end grounding.
Preferably, described voltage-regulator diode D1 voltage stabilizing value is 5V.
Compared with prior art, the beneficial effects of the invention are as follows：This circuit will record by the way of direct capacitance coupling
Sound is coupled on telephone line by the output signal on instrument by electric capacity C2 and resistance R2, and circuit reliability height, price are just
Preferably and can be as automatic telephone inquiry or the interface circuit of telephone dialing control system, using flexible.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Embodiment
The present invention is further elaborated below in conjunction with the accompanying drawings, embodiments of the invention not limited to this.
Embodiment 1：
As shown in figure 1, the present invention include socket, loudspeaker, double control switch K, bridge rectifier diode D, voltage-regulator diode D1,
Resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, triode T1 and triode T2, pressure
Quick resistance R1 pressure sensitive voltage is 150V, resistance R2 and triode T2 common end grounding, and voltage-regulator diode D1 voltage stabilizing value is
5V.The port 1 of port 1 and bridge rectifier diode D on the socket of the present embodiment connects, and the port 2 and bridge-type on socket are whole
Stream diode D port 3 connects, and bridge rectifier diode D port 2 is sequentially connected in series electric capacity C2 and double control switch K not moved end
C, bridge rectifier diode D port 4 are sequentially connected in series resistance R3, triode T1 emitter stage, triode T1 colelctor electrode, three poles
Pipe T2 colelctor electrode, triode T2 emitter stage and resistance R2, resistance R2 are also connected with bridge rectifier diode D port 2.This reality
Apply the I/O port 1 on the double control switch K of example moved end a connection loudspeaker, the IO ends on double control switch K not moved end b connection loudspeaker
Mouthfuls 2, the I/O port 3 on loudspeaker connects electric capacity C1, electric capacity C1 ground connection.The triode T2 of the present embodiment basis set is sequentially connected in series resistance
R5 and control signal end, resistance R4 is connected between triode T1 basis set and colelctor electrode；Bridge rectifier diode D port 4 with
Electric capacity C3 is connected between signal input part, voltage stabilizing two is connected between triode T1 basis set and bridge rectifier diode D port 4
Pole pipe D1, in voltage-regulator diode D1 both ends shunt capacitance C4.
The input exchange signal transmitted for signal input part enters bridge rectifier after first passing through electric capacity C3 filter action
Diode D powers to socket again after AC signal is converted into direct current signal, is used for external electric equipment.Input friendship simultaneously
Signal is flowed after electric capacity C3 filtering, and triode T1 emitter stage is entered after resistance R3 partial pressure；Input exchange signal
The input triode T1 base stage after electric capacity C3 and electric capacity C4 filter action, and voltage-regulator diode D1 setting, then avoid
Ac input signal is directly entered triode T1 and T2 colelctor electrode, damages triode.This circuit passes through a current source simultaneously
Break-make is realized, is provided with interchanger on double control switch K not moved end C, interchanger is sentenced by the DC current on circuit
Disconnected user's plucks receiver-on-hook condition.Resistance R3, R4 and R5 are then to be used for partial pressure, protection triode T1 and T2.When control signal end is
During low level, triode T2 cut-offs, electric current is smaller, in hook state；When control signal end is high level, triode T2 is led
Logical, triode T1 and T2 composition electric current, electric current is larger, and now loudspeaker send sound, phone off-hook, and double control switch K moved end connects
It is connected on not on the C of moved end, loudspeaker stop sounding, are in the double control switch interchanger that moved end C is not set and connect speech channel state.
Output signal on recorder is passed through electricity by this circuit by the way of direct capacitance coupling compared with prior art
Hold C2 and resistance R2 sound is coupled on telephone line, eliminate extra electronic component and extra electron component
Interference, signal transmission is more stable, and the circuit reliability is high, cheap and can be used as automatic telephone inquiry or telephone dialing control
The interface circuit of system processed, using flexible.
Embodiment 2：
The present embodiment is preferably as follows on the basis of embodiment 1：Between bridge rectifier diode D port 1 and port 3 also
Piezo-resistance R1 in parallel.Bridging piezo-resistance R1 in addition, has the function that protection against lightning strikes.
The invention can be realized as described above.
Claims (5)
1. the interface circuit of voice recorder, it is characterised in that：Including socket, loudspeaker, double control switch K, bridge rectifier diode
D, voltage-regulator diode D1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, triode
T1 and triode T2, the port 1 of port 1 and bridge rectifier diode D on the socket connect, port 2 and bridge on socket
Formula commutation diode D port 3 connects, and bridge rectifier diode D port 2 is sequentially connected in series electric capacity C2 and double control switch K not
Moved end C, bridge rectifier diode D port 4 be sequentially connected in series resistance R3, triode T1 emitter stage, triode T1 colelctor electrode,
Triode T2 colelctor electrode, triode T2 emitter stage and resistance R2, resistance R2 are also connected with bridge rectifier diode D port 2；
I/O port 1 on described double control switch K moved end a connection loudspeaker, the IO ends on double control switch K not moved end b connection loudspeaker
Mouthfuls 2, the I/O port 3 on loudspeaker connects electric capacity C1, electric capacity C1 ground connection；Described triode T2 basis set be sequentially connected in series resistance R5 and
Control signal end, resistance R4 is connected between triode T1 basis set and colelctor electrode；Described bridge rectifier diode D port 4
Electric capacity C3 is connected between signal input part, voltage stabilizing is connected between triode T1 basis set and bridge rectifier diode D port 4
Diode D1, in voltage-regulator diode D1 both ends shunt capacitance C4.
2. the interface circuit of voice recorder according to claim 1, it is characterised in that：Described bridge rectifier diode
Piezo-resistance R1 also in parallel between D port 1 and port 3.
3. the interface circuit of voice recorder according to claim 1, it is characterised in that：Described piezo-resistance R1 pressure
Quick voltage is 150V.
4. the interface circuit of voice recorder according to claim 1, it is characterised in that：Described resistance R2 and triode
T2 common end grounding.
5. the interface circuit of voice recorder according to claim 1, it is characterised in that：Described voltage-regulator diode D1's
Voltage stabilizing value is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710716196.8A CN107564552A (en) | 2017-08-21 | 2017-08-21 | The interface circuit of voice recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710716196.8A CN107564552A (en) | 2017-08-21 | 2017-08-21 | The interface circuit of voice recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107564552A true CN107564552A (en) | 2018-01-09 |
Family
ID=60976416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710716196.8A Withdrawn CN107564552A (en) | 2017-08-21 | 2017-08-21 | The interface circuit of voice recorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107564552A (en) |
-
2017
- 2017-08-21 CN CN201710716196.8A patent/CN107564552A/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| 许海国 陆延丰: "语音数字记录仪的电话接口", 《电子应用技术》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180109 |
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| WW01 | Invention patent application withdrawn after publication |