CN208609171U - A kind of speaker circuit of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency - Google Patents
A kind of speaker circuit of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency Download PDFInfo
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- CN208609171U CN208609171U CN201821213958.9U CN201821213958U CN208609171U CN 208609171 U CN208609171 U CN 208609171U CN 201821213958 U CN201821213958 U CN 201821213958U CN 208609171 U CN208609171 U CN 208609171U
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Abstract
The utility model provides the speaker circuit of a kind of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency, including governor circuit, voice input circuit and background noise monitoring circuit, voice input circuit is electrically connected with governor circuit, background noise monitoring circuit is electrically connected with governor circuit, background noise monitoring circuit includes first capacitor, first resistor, and first capacitor is in parallel with first resistor；It is characterized by: voice input circuit includes voice communication input circuit, voice communication input circuit includes the first triode and the first common end, first triode is connected with the first common end, background noise monitoring circuit includes the second triode, second resistance and the second common end, first resistor is in parallel with second resistance, and second resistance is connected with the second triode, and first resistor is in parallel with second resistance, second triode is connected with the second common end, and the first common end and the second common end are connected with each other.The utility model has the characteristics that compatible the tinkle of bells frequency and speech sound waves frequency are transmitted.
Description
Technical field
The utility model relates to the speaker circuit fields in doorbell talkback, are specifically a kind of compatible the tinkle of bells
The speaker circuit of frequency and the transmission of speech sound waves frequency.
Background technique
In order to provide safeguard to people's residential security, especially the residential security of cell and Private Lounge, people pass through peace
Doorbell talkback is filled identify to the identity of visitor.Common the tinkle of bells is ding-dong the tinkle of bells, with technological progress
With the demand in market, the tinkle of bells in doorbell talkback is more and more abundant, and it is simple DING DONG BELL that client, which no longer meets the tinkle of bells,
Sound, some clients even require custom ringtone, such as play the music inside indoor unit memory.
But when voice communication, the frequency of sound wave of people is between 100HZ-300Hz, and the frequency of sound wave of existing the tinkle of bells exists
Between 30-800Hz, the circuit of the speech talkback in intercom system is generally adopted by the speaker circuit of fixed frequency, in this way
It has resulted in being unable to satisfy the frequency of sound wave of the tinkle of bells in the circuit parameter of the speaker circuit for the adjustment of speech sound waves frequency
Adjustment requirement, this results in the phenomenon that having Caton when playing the tinkle of bells or even losing.
Summary of the invention
The purpose of the utility model is to provide the speaker circuits of a kind of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency.
To achieve the goals above, a kind of compatible the tinkle of bells frequency provided by the utility model and speech sound waves frequency are transmitted
Speaker circuit includes governor circuit, voice input circuit and background noise monitoring circuit, and voice input circuit and master control are electric
It is electrically connected between road, is electrically connected between background noise monitoring circuit and governor circuit, background noise monitoring circuit includes the first electricity
Hold, first resistor, it is in parallel between first capacitor and first resistor；It is characterized by: voice input circuit includes that voice communication is defeated
Enter circuit, voice communication input circuit includes the first triode and the first common end, between the first triode and the first common end
Series connection, background noise monitoring circuit further include the second triode, second resistance and the second common end, and first resistor is electric with second
It is in parallel between resistance, it connects between second resistance and the second triode, in parallel between first resistor and second resistance, the second triode
It connects between the second common end, the first common end and the second common end are connected with each other.
It can be seen that the triode in the first triode and background noise monitoring circuit in voice input circuit plays out
The effect on powered-down road, and in the case where the first triode and the second triode ON, voice input circuit and background noise prison
It can be attached by the first common end and the second common end depending on circuit.Further, the second triode ON the case where
Under, it is in parallel between first resistor and second resistance, it is possible to reduce the resistance value of background noise monitoring circuit.It is not led in the first triode
In the case where logical, the second triode is also not turned on, and the resistance value in background noise monitoring circuit is the resistance value of first resistor, and background is made an uproar
The resistance value of sound monitoring circuit is larger.It include background noise monitor in speaker circuit, when background noise monitoring sends monitoring
Between length can change the size of frequency transfer in speaker circuit.Speaker circuit passes through background noise monitoring circuit
The adjustment to circuit parameter is carried out, when so that the tinkle of bells playing, background noise monitor, which is sent, monitors that the time is short, is suitble to the tinkle of bells sound wave
The adjustment requirement of frequency；When voice communication, background noise monitor, which is sent, monitors that the time is long, is suitble to the adjustment of speech sound waves frequency
It is required that.As it can be seen that can change background noise monitor by the adjustment that background noise monitoring circuit carries out circuit parameter sends prison
Length between apparent time, so that speaker circuit can be with compliant speech frequency of sound wave and the tinkle of bells frequency.
Preferably, governor circuit uses MC34118 chip.
As it can be seen that governor circuit can be integrated multiple control circuits using MC34118 chip.
Further, voice input circuit further includes the tinkle of bells input circuit, the tinkle of bells input circuit and voice communication input electricity
Road is in parallel.
As it can be seen that the tinkle of bells and voice are inputted by voice input circuit, wherein just can be into after being played due to the tinkle of bells
Row voice communication, so in parallel between the tinkle of bells input circuit and voice communication electricity input circuit.
Further, the tinkle of bells input circuit includes coupling the tinkle of bells capacitor and 3rd resistor, couples the tinkle of bells capacitor and third
It connects between resistance.
As it can be seen that the tinkle of bells played can be coupled into the tinkle of bells input circuit by being converted to electric signal after coupling the tinkle of bells capacitor
In, wherein 3rd resistor can play the role of reducing the voltage of coupling the tinkle of bells capacitor.
Further, voice communication input circuit includes microphone, the second capacitor and the 4th resistance, microphone and first
It connects between triode, connects between the first triode and the second capacitor, connect between the second capacitor and the 4th resistance.
As it can be seen that voice is to be converted to electric signal by microphone to enter voice communication input circuit, wherein the second capacitor
Play the role of stabilizing circuit frequency by charge and discharge, second resistance can play the voltage for reducing the second capacitor.
Speaker circuit includes voice input first order amplifying circuit, voice input first order amplifying circuit and governor circuit
Between be electrically connected.
As it can be seen that governor circuit can carry out putting for input audio signal by control voice input first order amplifying circuit
Greatly.
Speaker circuit includes voice input second level amplifying circuit, voice input second level amplifying circuit and governor circuit
Between be electrically connected.
As it can be seen that governor circuit carries out the further of input audio signal by control voice input second level amplifying circuit
Amplification.
Speaker circuit includes sound output first order amplifying circuit, and sound exports first order amplifying circuit and governor circuit
Between be electrically connected.
As it can be seen that governor circuit exports the amplification that first order amplifying circuit carries out output voice signal by control sound.
Speaker circuit includes sound output second level amplifying circuit, and sound exports second level amplifying circuit and governor circuit
Between be electrically connected.
As it can be seen that governor circuit, which exports second level amplifying circuit by control sound, carries out further putting for output voice signal
Greatly, and sound exports second level amplifying circuit and amplified voice signal is output to external circuits.
Detailed description of the invention
Fig. 1 is the speaker circuit embodiment of a kind of compatible the tinkle of bells frequency of the utility model and the transmission of speech sound waves frequency
Structural block diagram.
Fig. 2 is the speaker circuit embodiment of a kind of compatible the tinkle of bells frequency of the utility model and the transmission of speech sound waves frequency
Internal electrical schematic diagram.
Fig. 3 is the speaker circuit embodiment of a kind of compatible the tinkle of bells frequency of the utility model and the transmission of speech sound waves frequency
Circuit diagram.
Fig. 4 is the electrical schematic diagram of voice input circuit in Fig. 3.
Fig. 5 is the electrical schematic diagram of background noise monitoring circuit in Fig. 3.
The following is a further explanation of the present invention with reference to the accompanying drawings and embodiments.
Specific embodiment
Referring to Fig. 1, the speaker circuit that a kind of compatible the tinkle of bells frequency of the present embodiment is transmitted with speech sound waves frequency includes
Governor circuit 10, voice input circuit 12, background noise monitoring circuit 14, voice input level-one amplifying circuit 16, voice input
Second amplifying circuit 17, sound output first order amplifying circuit 18, sound export second level amplifying circuit 19, wherein master control electricity
Road 10 respectively with voice input circuit 12, background noise monitoring circuit 14, voice input level-one amplifying circuit 16, voice input two
Grade amplifying circuit 17, sound output first order amplifying circuit 18, sound output second level amplifying circuit 19 are electrically connected.
Wherein, governor circuit 10 is can be controlled multiple circuit integrations using MC34118 chip, and the tinkle of bells plays knot
Voice communication is carried out after beam.When having the tinkle of bells to play or voice communication, voice input circuit 12 receives voice signal and sends to
Governor circuit 10, governor circuit 10 adjust the frequency of voice signal by background noise monitoring circuit 14, then master control
Circuit 10 sends voice signal to voice input level-one amplifying circuit 16 again and amplifies, and voice input level-one amplifying circuit 16 will be put
After voice signal after big passes governor circuit 10 back, governor circuit 10 sends amplified voice signal to voice input two again
Grade amplifying circuit 17 is further amplified, and the voice signal after voice input second amplifying circuit 17 will be further amplified passes
After returning governor circuit 10, governor circuit 10 sends voice signal to sound output first order amplifying circuit 18 again and amplifies,
After amplified voice signal is sent back governor circuit 10 by sound output first order amplifying circuit 18, governor circuit 10 will be into one
The voice signal of step amplification sends sound output second level amplifying circuit 19 to and exports, and second level amplifying circuit 19 again will be after amplification
Voice signal export to external circuits.
Referring to fig. 2, electrical schematic diagram includes first capacitor C1, first resistor R1, governor circuit 10 inside speaker circuit, the
In parallel between one resistance R1 and first capacitor C1, governor circuit 10 includes pin CT, pin VB, current source U1, current source U2, control
Circuit 2, amplifier 4 and background noise monitor 6 processed, the one end first capacitor C1 ground connection, the other end are electrically connected with pin CT, the
One resistance R1 is electrically connected with pin CT and pin VB respectively, and current source U1 is electrically connected with pin CT and control circuit 2 respectively, electricity
Stream source U2 is electrically connected with control circuit 2 and amplifier 4 respectively, and amplifier 4 and pin CT, control circuit 2 and background noise are supervised
Visual organ 6 is electrically connected, and control circuit 2 is electrically connected with background noise monitor 6.Wherein, governor circuit 10 is monitored by background noise
The frequency that device 6 carries out voice signal is adjusted, and control circuit 2 controls current source U1 and current source U2, and current source U1 is to pin CT
Power supply, current source U2 power to amplifier 4, the switch of control circuit 2 and pin CT co- controlling amplifier 4.Current source U1 is just
When often powering to pin CT, first capacitor C1 charges with first resistor R1, when there is voice signal input, control circuit 2
Amplifier 4 is opened, while the part current source U1 turns off, first capacitor C1 discharges with first resistor R1, the electric current of amplifier 4
Amount increases, so the value that the time constant of amplifier 4 is first resistor R1 is multiplied with first capacitor C1 value, changes first resistor R1
Also just change the switch time of amplifier 4 with the multiplied value of first capacitor C1, and first resistor R1 and first capacitor C1 are multiplied
Value is bigger, and switch time is shorter.Further, since amplifier 4 controls background noise monitor 6, change the switch of amplifier 4
Time can also change the length that background noise monitor 6 sends the monitoring time, so changing first resistor R1 and the on pin CT
The size of the multiplied value of one capacitor C1 can change the length that background noise monitor 6 sends the monitoring time, and first resistor R1
Bigger with the multiplied value of first capacitor C1, it is shorter that background noise monitor 6 sends the monitoring time.Wherein, background noise monitor 6
It sends and monitors that the time is longer, signal transmission frequencies are bigger in governor circuit 10, are suitble to voice communication；Background noise monitor 6 is sent out
Send the monitoring time shorter, signal transmission frequencies are smaller in governor circuit 10, and the tinkle of bells is suitble to play.
Referring to Fig. 3, speaker circuit includes voice input circuit 12, pin MCI, governor circuit 10, background noise monitoring
Circuit 14, pin CT and pin VB, voice input circuit 12 are electrically connected by pin MCI with governor circuit 10, background noise
Monitoring circuit 14 is electrically connected by pin CT and pin VB with governor circuit 10.
Referring to fig. 4, voice input circuit 12 includes the tinkle of bells input circuit 22 and voice communication input circuit 24, and the tinkle of bells is defeated
It is in parallel with voice communication input circuit 24 to enter circuit 22.Wherein, the tinkle of bells input circuit 22 includes coupling the tinkle of bells capacitor C2, third electricity
R3 is hindered, coupling the tinkle of bells capacitor C2 connects with 3rd resistor R3, and it is defeated that ringing signal directly can enter the tinkle of bells by coupled capacitor C2
Enter circuit 22,3rd resistor R3 avoids 22 voltage change of the tinkle of bells input circuit excessive for protecting the tinkle of bells input circuit 22.Voice
Input circuit 24 of conversing includes microphone J1, the first triode Q1, the second capacitor C3, resistance R2, common end MIC-EN1 and the
Four resistance R4, microphone J1 connect with the emitting stage of the first triode Q1, and resistance R2 is in parallel with the emitting stage of the first triode Q1,
Connect between the ground level of first triode Q1 and common end MIC-EN1, the current collection grade of the first triode Q1 and the second capacitor C3 it
Between connect, connect between the second capacitor C3 and the 4th resistance R4, voice communication signal is passed to voice by defeated by microphone J1
Enter in circuit 24, switch element of the first triode Q1 as voice communication signal, when microphone J1 has voice signal input
First triode Q1 conducting.Wherein, the second capacitor C3 plays the role of stable 24 frequency of voice communication input circuit, the 4th resistance
R4 plays the role of partial pressure, and resistance 2 plays the emitter of protection triode.
Referring to Fig. 5, background noise monitoring circuit 14 includes first resistor R1, the second triode Q2, second resistance R5, resistance
R6, the second common end MIC-EN2, first capacitor C1, wherein first capacitor C1 is in parallel with first resistor R1, and first capacitor with
It connects between pin CT, connects between first resistor R1 and pin CT, between second resistance R5 and the second triode Q2 current collection grade
Series connection, first resistor R1 is in parallel with second resistance R5, and the ground level of the second triode Q2 is connected with the second common end MIC-EN2, electricity
It is in parallel with the radiation grade of the second triode Q2 to hinder R6, resistance R6 plays the role of protecting the second triode Q2 emitting stage.Further,
First common end MIC-EN1 and the second common end MIC-EN2 is connected with each other, and voice signal can pass through the first common end MIC-
EN1 is transferred to the second common end MIC-EN2.
In the present embodiment, since the frequency of sound wave of voice is 100HZ-300Hz, the frequency of sound wave of the tinkle of bells is 30-800Hz,
Multiplied value by changing first resistor R1 and first capacitor C1 can change background noise monitor and send the big of monitoring time
Small, first resistor R1 and the multiplied value of first capacitor C1 are smaller, and background noise monitor, which is sent, monitors that the time is longer, governor circuit
Transmission of sound signals frequency in 10 is big, is suitble to voice communication；First resistor R1 and the multiplied value of first capacitor C1 are bigger, background
Noise monitor, which is sent, monitors that the time is shorter, and the transmission of sound signals frequency in governor circuit 10 is small, and the tinkle of bells is suitble to play.
If the value of first resistor R1 and first capacitor C1 are set as a biggish fixed value, by reducing first resistor
The value of R1 sends monitoring length of time to change, and allows speaker circuit to be compatible with the tinkle of bells frequency and speech sound waves frequency passes
Defeated, specific implementation is as follows:
When the tinkle of bells plays, the voice signal that the tinkle of bells plays is directly over coupling the tinkle of bells capacitor C2 and is coupled into voice input
In circuit 12, the first triode Q1 is not turned at this time, and the second triode Q2 is not turned on, at this time first resistor R1 and first capacitor C1
Multiplied value it is larger, be suitble to the tinkle of bells play；After the tinkle of bells plays, when starting voice communication, voice signal passes through microphone J1
Into in voice input circuit 12, the first triode Q1 conducting, it is public that the ground level that signal passes through the first triode Q1 passes through first
End MIC-EN1 and the second common end MIC-EN2 is transmitted to the ground level of the second triode Q2, so that the second triode Q2 is connected, by
In parallel with first resistor R1 in second resistance R5, the value of first capacitor C1 is constant, and the value of first resistor R1 becomes smaller, so the first electricity
The multiplied value for hindering R1 and first capacitor C1 is smaller, is suitble to voice communication.
It can be seen from the above, passing through the first triode and the first common end and background noise prison in voice communication input circuit
Depending in circuit the second triode and second resistance and the second common end, in the case where the capacitance of first capacitor is constant,
Input voice communication and broadcasting the tinkle of bells can allow the resistance value of first resistor to change, and then change first resistor and first capacitor
Multiplied value so that the compatible the tinkle of bells frequency of speaker circuit and speech sound waves frequency are transmitted.
Finally it is emphasized that the present invention is not limited to the above embodiments, such as by being connected serially to first resistor
The mode that the resistance value that few resistance changes first resistor changes first resistor and first capacitor multiplied value, it is practical at this
In novel protected range.
Claims (8)
1. the speaker circuit of a kind of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency, including
Governor circuit, voice input circuit and background noise monitoring circuit, the voice input circuit and the governor circuit
Between be electrically connected, be electrically connected between the background noise monitoring circuit and the governor circuit, the background noise monitoring circuit
It is in parallel between the first capacitor and the first resistor including first capacitor, first resistor；
It is characterized by:
The voice input circuit includes voice communication input circuit, the voice communication input circuit include the first triode and
First common end is connected between first triode and first common end, and the background noise monitoring circuit further includes
Second triode, second resistance and the second common end, it is in parallel between the first resistor and the second resistance, described second
It connects between resistance and second triode, in parallel between the first resistor and the second resistance, the two or three pole
It manages and connects between second common end, first common end and second common end are connected with each other.
2. speaker circuit according to claim 1, it is characterised in that:
The voice input circuit further includes the tinkle of bells input circuit, the tinkle of bells input circuit and the voice communication input circuit
It is in parallel.
3. speaker circuit according to claim 2, it is characterised in that:
The tinkle of bells input circuit includes coupling the tinkle of bells capacitor and 3rd resistor, and the coupling the tinkle of bells capacitor and the third are electric
It connects between resistance.
4. speaker circuit according to claim 3, it is characterised in that:
The voice communication input circuit further includes microphone, the second capacitor and the 4th resistance, the microphone and described the
It connects between one triode, connects between first triode and second capacitor, second capacitor and the described 4th
It connects between resistance.
5. speaker circuit according to any one of claims 1 to 4, it is characterised in that:
The speaker circuit includes voice input first order amplifying circuit, the voice input first order amplifying circuit with it is described
It is electrically connected between governor circuit.
6. speaker circuit according to any one of claims 1 to 4, it is characterised in that:
The speaker circuit includes voice input second level amplifying circuit, voice input second level amplifying circuit with it is described
It is electrically connected between governor circuit.
7. speaker circuit according to any one of claims 1 to 4, it is characterised in that:
The speaker circuit includes sound output first order amplifying circuit, sound output first order amplifying circuit with it is described
It is electrically connected between governor circuit.
8. speaker circuit according to any one of claims 1 to 4, it is characterised in that:
The speaker circuit includes sound output second level amplifying circuit, sound output second level amplifying circuit with it is described
It is electrically connected between governor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821213958.9U CN208609171U (en) | 2018-07-27 | 2018-07-27 | A kind of speaker circuit of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821213958.9U CN208609171U (en) | 2018-07-27 | 2018-07-27 | A kind of speaker circuit of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208609171U true CN208609171U (en) | 2019-03-15 |
Family
ID=65671499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821213958.9U Expired - Fee Related CN208609171U (en) | 2018-07-27 | 2018-07-27 | A kind of speaker circuit of compatible the tinkle of bells frequency and the transmission of speech sound waves frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208609171U (en) |
-
2018
- 2018-07-27 CN CN201821213958.9U patent/CN208609171U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190315 Termination date: 20200727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |