CN214704459U - Dynamic constant current circuit and communication device applying same - Google Patents
Dynamic constant current circuit and communication device applying same Download PDFInfo
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- CN214704459U CN214704459U CN202120870839.6U CN202120870839U CN214704459U CN 214704459 U CN214704459 U CN 214704459U CN 202120870839 U CN202120870839 U CN 202120870839U CN 214704459 U CN214704459 U CN 214704459U
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Abstract
The utility model provides a developments constant current circuit and communication device who uses thereof relates to communication constant current circuit's technical field. One end of a resistor R1 is connected with the anode of an electrolytic capacitor C1, the other end of a resistor R1 is connected with the emitter of a triode Q1, the base of the triode Q1 is connected with the emitter of a triode Q2, the collector of a triode Q1 is connected with the collector of a triode Q2, the base of the triode Q2 is connected with the cathode of an electrolytic capacitor C1, one end of the resistor R2 is connected with the collector of a triode Q2, and the other end of the resistor R2 is connected with the cathode of an electrolytic capacitor C1; one end of the electrolytic capacitor C2 is connected to the negative electrode of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C2 is grounded. The circuit can reduce the cost under the condition of ensuring that the circuit obtains a constant current power supply. In addition, the communication device can still stably work for a long time under the condition of reducing the cost.
Description
Technical Field
The utility model relates to a communication constant current circuit's technical field particularly, relates to a developments constant current circuit and communication device who uses thereof.
Background
In modern life, the use of electric power is closely related to human life, and the application of circuits is rapidly improved along with the improvement of the quality of life of people, wherein the constant current application of the circuits in the prior art is increased day by day, and the circuits are particularly applied in the fields of power supply, communication, analog voice and the like. However, although the purpose of enabling constant current operation has been achieved in the prior art, the cost is high, and large-scale use is not facilitated, which hinders the popularization thereof, so that a stable and inexpensive constant current circuit is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a developments constant current circuit, it can be under the condition that the assurance circuit obtained constant current power supply, reduce cost.
Another object of the present invention is to provide a communication device, which can work stably for a long time under the condition of reducing cost.
The embodiment of the utility model is realized like this:
in a first aspect, an embodiment of the present application provides a dynamic constant current circuit, which includes a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, an electrolytic capacitor C1, and an electrolytic capacitor C2, wherein one end of the resistor R1 is connected to the positive electrode of the electrolytic capacitor C1, the other end of the resistor R1 is connected to the emitter of the transistor Q1, the base of the transistor Q1 is connected to the emitter of the transistor Q2, the collector of the transistor Q1 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to the negative electrode of the electrolytic capacitor C1, one end of the resistor R2 is connected to the collector of the transistor Q2, and the other end of the resistor R2 is connected to the negative electrode of the electrolytic capacitor C1; one end of the electrolytic capacitor C2 is connected to the negative electrode of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C2 is grounded.
In some embodiments of the present invention, transistor Q1 is of type TIP 32C.
In some embodiments of the present invention, transistor Q2 is model B766A.
In a second aspect, an embodiment of the present application provides a communication device, which includes a voltage regulator, a protection device, a communicator, and the above dynamic constant current circuit; the output end of the voltage regulating device is connected with the common end of the resistor R1 and the electrolytic capacitor C1, the input end of the protection device is connected with the collector of the triode Q1, and the output end of the protection device is connected with the input end of the communicator.
In some embodiments of the present invention, the voltage regulating device employs an autotransformer.
In some embodiments of the present invention, the protection device employs a self-restoring resistance wire.
In some embodiments of the present invention, the communicator includes a voice transceiver, a communication controller and an extension system respectively connected to the output end of the protection device.
In some embodiments of the present invention, the voice transceiver comprises a microphone, a processor, and a speaker; the input end of the processor is connected with the output end of the protection device, and the output end of the processor is respectively connected with the microphone and the loudspeaker.
In some embodiments of the present invention, the communication control device employs a PLC.
In some embodiments of the present invention, the extension system includes a bus protector connected with the protection device and a plurality of extensions connected with the bus protector.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
a dynamic constant current circuit comprises a resistor R1, a resistor R2, a triode Q1, a triode Q2, an electrolytic capacitor C1 and an electrolytic capacitor C2, wherein one end of the resistor R1 is connected with the positive electrode of the electrolytic capacitor C1, the other end of the resistor R1 is connected with the emitter of the triode Q1, the base of the triode Q1 is connected with the emitter of the triode Q2, the collector of the triode Q1 is connected with the collector of the triode Q2, the base of the triode Q2 is connected with the negative electrode of the electrolytic capacitor C1, one end of the resistor R2 is connected with the collector of the triode Q2, and the other end of the resistor R2 is connected with the negative electrode of the electrolytic capacitor C1; one end of the electrolytic capacitor C2 is connected to the negative electrode of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C2 is grounded.
In some embodiments of the present invention, the dynamic constant current circuit in the design can be applied to long distance, power supply, communication, and analog languageThe key circuit of the two buses with multifunction of voice is designed in the host system of the distributed system. By applying the circuit technology, the stable power supply of the host system to the extension system through the output end is realized, the high-frequency digital signal waveform on the output end is not attenuated, the communication and the power supply are perfectly fused, and the long-distance data transmission of the output end is ensured by adopting the technology of controlling the voltage of the output end by using the pulsating current. In this embodiment, the transistor Q1 and the transistor Q2 are PNP transistors, Vin is the dc power input voltage, VQ1EIs the emitter voltage, V, of transistor Q1Q1BEIs the voltage between the base and emitter of transistor Q1, VQ2BEIs the base and emitter voltage, V, of Q2Q2BIs the base voltage of Q2, VOUTFor the output end voltage, in the initial stage of starting the equipment, the power supply charges the electrolytic capacitors C1 and C2, and after the charging is completed, the voltage of VQ2B is as follows:
VQ2B＝(Vin-VQ1E)+VQ1BE+VQ2BE≈IOUT*R1+1.2
when there is no data on the output, the load on the output is allowed to vary over a wide range, but when the system is running, the load is relatively stable, since Vin>VOUTThe current passes through the resistor R1, the EB junction of the transistor Q1, the EB junction of the transistor Q2 and the resistor R2, and the base currents I are respectively provided for the transistor Q2 and the transistor Q1Q2BAnd IQ1BFrom which a current I is outputOUTWill approach a stable or constant current value, i.e. the output current I, according to the total current demand of the load deviceOUTDirect current component of (a): (wherein. betaQ1Is the current amplification factor, beta, of the transistor Q1Q2Is the current amplification factor of transistor Q2. )
IOUT≈IQ1C＝IQ1B*βQ1＝IQ2B*βQ1*βQ2
When the output end has data pulse, the data pulse is sent by the sending circuit in a mode of pulling down the bus to increase the bus current, and each low level causes the output end current IOUTBy the action of the resistor R1, V is caused to increaseQ1EThe voltage is also the sameStep down due to VQ2BRelatively stable under the action of electrolytic capacitors C1 and C2 with larger capacity, resulting in VQ1BEAnd VQ2BEIs given by the formula:
VQ1E＝(VQ1BE+VQ2BE)+VQ2B
according to the characteristics of the triode, Q1 and Q2 are equivalent to the fact that the current impedance is suddenly increased relative to the bus, VOUT is suddenly reduced, data transmission is finished, and the initial output end current I is recoveredOUTA dc component value. Therefore, the purpose of constant current is achieved, and because the number of the electronic components adopted in the implementation is very small, the electronic components are standard components which are common in the market, and the cost is reduced.
A communication device comprises a voltage regulating device, a protection device, a communicator and the dynamic constant current circuit; the output end of the voltage regulating device is connected with the common end of the resistor R1 and the electrolytic capacitor C1, the input end of the protection device is connected with the collector of the triode Q1, and the output end of the protection device is connected with the input end of the communicator.
The utility model discloses an in some embodiments, communication device is as the indispensable equipment in people's modern life, also has higher requirement to its stability, so the communication device of this embodiment adopts the constant current power supply who is provided by dynamic constant current circuit. The constant current power supply has the advantages of high response speed, high constant current precision, long-term stable work, suitability for various loads (resistive, inductive and capacitive) and the like. The communication device can be well promoted by setting rated current, action current and short-circuit protection current, and the practicability is improved. And the purpose of setting up the protection device is in order to protect the circuit safety in the communication equipment, thus improve the security. The voltage regulating device is arranged to adapt to the communication device requirement with more voltage, so that the adaptability is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic circuit diagram of a dynamic constant current circuit according to the present invention;
fig. 2 is a block diagram of a communication device according to the present invention.
Icon: 1. a voltage regulating device; 2. a dynamic constant current circuit; 3. a protection device; 4. a communicator; 41. a voice transceiver; 42. an extension system; 43. a communication control device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the individual features of the embodiments can be combined with one another without conflict.
Example 1
Referring to fig. 1, fig. 1 shows a dynamic constant current circuit provided in this embodiment, which includes a resistor R1, a resistor R2, a transistor Q1, a transistor Q2, an electrolytic capacitor C1, and an electrolytic capacitor C2, wherein one end of the resistor R1 is connected to the positive electrode of the electrolytic capacitor C1, the other end of the resistor R1 is connected to the emitter of the transistor Q1, the base of the transistor Q1 is connected to the emitter of the transistor Q2, the collector of the transistor Q1 is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to the negative electrode of the electrolytic capacitor C1, one end of the resistor R2 is connected to the collector of the transistor Q2, and the other end of the resistor R2 is connected to the negative electrode of the electrolytic capacitor C1; one end of the electrolytic capacitor C2 is connected to the negative electrode of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C2 is grounded.
The utility model discloses an in some embodiments, dynamic constant current circuit 2 in this design, the key that can be applied to long distance, have power supply, communication, the multi-functional two buses of simulated voice constitutes the circuit, is designed at the distributed system host system. By applying the circuit technology, the stable power supply of the extension system 42 by the host system through the output end is realized, simultaneously, the high-frequency digital signal waveform on the output end is not attenuated, the communication and the power supply are perfectly fused, and the long-distance data transmission of the output end is ensured by adopting the technology of controlling the voltage of the output end by the pulsating current. In this embodiment, the transistor Q1 and the transistor Q2 are PNP transistors, Vin is the dc power input voltage, VQ1EIs the emitter voltage, V, of transistor Q1Q1BEIs the voltage between the base and emitter of transistor Q1, VQ2BEIs the base and emitter voltage, V, of Q2Q2BIs the base voltage of Q2, VOUTFor the output end voltage, in the initial stage of starting the equipment, the power supply charges the electrolytic capacitors C1 and C2, and after the charging is completed, the voltage of VQ2B is as follows:
VQ2B＝(Vin-VQ1E)+VQ1BE+VQ2BE≈VOUT*R1+1.2
when there is no data on the output, the load on the output is allowed to vary over a wide range, but when the system is running, the load is relatively stable, since Vin>VOUTThe current passes through the resistor R1, the EB junction of the transistor Q1, the EB junction of the transistor Q2 and the resistor R2, and the base currents I are respectively provided for the transistor Q2 and the transistor Q1Q2BAnd IQB1From which a current I is outputOUTWill approach a stable or constant current value, i.e. the output current I, according to the total current demand of the load deviceOUTDirect current component of (a): (wherein. betaQ1Is the current amplification factor, beta, of the transistor Q1Q2Is the current amplification factor of transistor Q2. )
IOUT≈IQC1＝IQB1*βQ1＝IQB2*βQ1*βQ2
When there is a data pulse on the output, the data pulse is transmitted by the transmitting circuitBy pulling the bus low to increase the bus current, each low level causes an output current IOUTBy the action of the resistor R1, V is caused to increaseQ1EThe voltage is also reduced synchronously because of VQ2BRelatively stable under the action of electrolytic capacitors C1 and C2 with larger capacity, resulting in VQ1BEAnd VQ2BEIs given by the formula:
VQ1E＝(VQ1BE+VQ2BE)+VQ2B
according to the characteristics of the triode, Q1 and Q2 are equivalent to the fact that the current impedance is suddenly increased relative to the bus, VOUT is suddenly reduced, data transmission is finished, and the initial output end current I is recoveredOUTA dc component value. Therefore, the purpose of constant current is achieved, and because the number of the electronic components adopted in the implementation is very small, the electronic components are standard components which are common in the market, and the cost is reduced.
In some embodiments of the present invention, transistor Q1 is of type TIP 32C.
The utility model discloses an in some embodiments, to developments constant current circuit 2, the amplification of signal of telecommunication is favorable to the transmission of signal, so this embodiment adopts darlington triode TIP32C, and its essence is in the same place according to the compound joint of electric current flow direction with two triodes, and it is higher than the gain of ordinary triode, and concrete gain equals the gain product of two triodes, has improved the stability of transmission from this.
In some embodiments of the present invention, transistor Q2 is model B766A.
In some embodiments of the present invention, because the sending circuit sends the data pulse by pulling the bus low to increase the bus current, each low level causes the output current IOUTBy the action of the resistor R1, V is caused to increaseQ1EThe voltage is also reduced synchronously because of VQ2BRelatively stable under the action of electrolytic capacitors C1 and C2 with larger capacity, resulting in VQ1BEAnd VQ2BEA sudden decrease in; therefore, in order to achieve the above effect, the transistor Q2 of the present embodiment is a patch transistor B766A, which is pasted when being usedWhen a tiny current is added to the base of the chip triode, a current which is multiplied by the injection current beta (current amplification factor) can be obtained on the collector of the chip triode, namely the collector current of the chip triode. And the small change of the base current can cause the large change of the collector current, so that the patch triode achieves the amplification effect.
Example 2
Referring to fig. 2, a communication device provided in this embodiment includes a voltage regulator 1, a protection device 3, a communicator 4, and the dynamic constant current circuit 2; the output end of the voltage regulating device 1 is connected with the common end of the resistor R1 and the electrolytic capacitor C1, the input end of the protection device 3 is connected with the collector electrode of the triode Q1, and the output end of the protection device 3 is connected with the input end of the communicator 4.
The utility model discloses an in some embodiments, communication device is as the indispensable equipment in people's modern life, also has higher requirement to its stability, so the communication device of this embodiment adopts the constant current power supply who is provided by dynamic constant current circuit 2. The constant current power supply has the advantages of high response speed, high constant current precision, long-term stable work, suitability for various loads (resistive, inductive and capacitive) and the like. The communication device can be well promoted by setting rated current, action current and short-circuit protection current, and the practicability is improved. And the purpose of the protection device 3 is to protect the circuitry within the communication device and thereby improve the security. The voltage regulation device 1 is provided to adapt to the communication device requirements of more voltages, thereby improving the adaptability.
In some embodiments of the present invention, the voltage regulator 1 employs an autotransformer.
The utility model discloses an in some embodiments, because communication device's the demand that bears is different in the different cities, so the voltage source that communication device needs is also different, and this embodiment adopts autotransformer from this, and but its preferred voltage regulation formula autotransformer, and its beneficial effect lies in, can carry out better adaptation to the demand of difference for manufacturing factory can carry out standardized production, thereby makes cost reduction, and the adaptation scope is wider.
In some embodiments of the present invention, the protection device 3 employs a self-restoring resistance wire.
The utility model discloses an in some embodiments, the circuit operation in-process, the most commonly encountered problem is just overheated and overflow, and the circuit is overheated can lead to circuit components and parts operating temperature higher for components and parts are ageing with higher speed, and life shortens, and the circuit overflow then quick-witted one cause the conflagration. Therefore, in order to solve the above problems, the present embodiment adopts the self-recovery resistance wire as the protection device 3, thereby improving the safety.
Referring to fig. 2, in some embodiments of the present invention, the communicator 4 includes a voice transceiver 41, a communication controller 43 and an extension system 42 respectively connected to the output end of the protection device 3.
The utility model discloses an in some embodiments, communicator 4's multi-functional can be so that it uses more conveniently, so set up pronunciation transceiver 41 and simulate pronunciation, make it to utilize sound to control under communication control device 43's processing, improved the convenience. In addition, the extension system 42 is arranged, so that the number of users is increased, more people can use the extension system, and the practicability is improved.
In some embodiments of the present invention, the voice transceiver 41 includes a microphone, a processor and a speaker; the input end of the processor is connected with the output end of the protection device 3, and the output end of the processor is respectively connected with the microphone and the loudspeaker.
In some embodiments of the present invention, the microphone is used to collect the operator's voice signals, the speaker is used to report the internal conditions of the communication device, and the processor uses cs8420 chip, cs8420 chip is a stereo digital audio sampling frequency converter chip with AES3 type and serial digital audio input, AES3 type and serial digital audio output, and integrated control through a 4-wire microcontroller port. The sound channel state and the user data are integrated on the buffer divided into the blocks, so that the reading, modifying and writing processes are simpler and easier. Digital audio of 24 bits, 20 bits, or 16 bits may be input or output. The input data may be completely asynchronous with the output data, while the output data may be synchronized with an external system clock. The mutual conversion of the AES3 signal and the I2S signal can be realized. The designer can conveniently customize the design, and the practicability is improved.
In some embodiments of the present invention, the communication control device 43 is a PLC.
In some embodiments of the present invention, the accuracy of signal transmission is higher in the using process of the communication device, so that once a signal transmission error occurs, the communication content will be in error, resulting in that the signal cannot be delivered. Therefore, the communication control device 43 of the present embodiment has the advantages of high reliability and strong anti-interference capability by using the PLC programmable logic controller, thereby increasing the stability thereof.
In some embodiments of the present invention, extension system 42 includes a bus protector connected with protection device 3 and a plurality of extensions connected with the bus protector.
The utility model discloses an in some embodiments, bus protector adopts short circuit protection ware, and its aim at can make load increase in the whole circuit when a plurality of extension inserts to make the circuit temperature rise, make certain electronic components damage the back and take place the short circuit, set up short circuit protection ware from this, in time protect, in order to avoid the extension to appear damaging, thereby improved the security.
In the embodiments provided in the present application, it should be understood that the disclosed circuits and methods may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dynamic constant current circuit is characterized by comprising a resistor R1, a resistor R2, a triode Q1, a triode Q2, an electrolytic capacitor C1 and an electrolytic capacitor C2, wherein one end of the resistor R1 is connected with the positive electrode of the electrolytic capacitor C1, the other end of the resistor R1 is connected with the emitter of the triode Q1, the base of the triode Q1 is connected with the emitter of the triode Q2, the collector of the triode Q1 is connected with the collector of the triode Q2, the base of the triode Q2 is connected with the negative electrode of the electrolytic capacitor C1, one end of the resistor R2 is connected with the collector of the triode Q2, and the other end of the resistor R2 is connected with the negative electrode of the electrolytic capacitor C1; one end of the electrolytic capacitor C2 is connected with the negative electrode of the electrolytic capacitor C1, and the other end of the electrolytic capacitor C2 is grounded.
2. The dynamic constant current circuit of claim 1, wherein the transistor Q1 is type TIP 32C.
3. The dynamic constant current circuit of claim 1, wherein the transistor Q2 is of type B766A.
4. A communication device comprising a voltage regulator, a protection device, a communicator, and the dynamic constant current circuit of claim 1; the output end of the voltage regulating device is connected with the common end of the resistor R1 and the electrolytic capacitor C1, the input end of the protection device is connected with the collector electrode of the triode Q1, and the output end of the protection device is connected with the input end of the communicator.
5. The communication device according to claim 4, wherein the voltage regulator is an autotransformer.
6. The communication device according to claim 4, wherein the protection device is a self-healing resistance wire.
7. The communication device according to claim 4, wherein the communicator comprises a voice transceiver, a communication control device and an extension system respectively connected with the output end of the protection device.
8. The communication device of claim 7, wherein the voice transceiver comprises a microphone, a processor, and a speaker; the input of treater with protection device's output is connected, the output of treater respectively with the microphone, the speaker is connected.
9. The communication device according to claim 7, wherein the communication control device is a PLC programmable logic controller.
10. The communication device according to claim 7, wherein the extension system comprises a bus protector connected to the protection device and a plurality of extensions connected to the bus protector.
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