CN208656724U - Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine - Google Patents
Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine Download PDFInfo
- Publication number
- CN208656724U CN208656724U CN201821152754.9U CN201821152754U CN208656724U CN 208656724 U CN208656724 U CN 208656724U CN 201821152754 U CN201821152754 U CN 201821152754U CN 208656724 U CN208656724 U CN 208656724U
- Authority
- CN
- China
- Prior art keywords
- temperature
- circuit
- resistance
- operational amplifier
- signal
- 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.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a kind of temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine, the temperature-compensation circuit includes: operational amplifier；The input terminal of the operational amplifier and the output end of input signal circuit connect；The output end of the operational amplifier is connect with the input terminal for receiving circuit；The operational amplifier is for amplifying processing to input signal, to complete the temperature-compensating to input signal.The communicating circuit includes: input signal circuit, receives circuit and as elucidated before temperature-compensation circuit.The utility model is by increasing a temperature-compensation circuit in input signal circuit rear end, since temperature-compensation circuit can carry out temperature-compensating to input signal, thus it can alleviate temperature to the anomalous effects of communicating circuit, so as to solve communication failure caused by temperature increases, the reliability of communication is greatly improved.
Description
Technical field
The utility model relates to electronic circuit technology fields, and in particular to a kind of temperature-compensation circuit, communicating circuit, UART
Communicating circuit and smart machine.
Background technique
UART (Universal Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter)
Communication is used as a kind of asynchronous receiving-transmitting transmission mode, the data transmission being widely used between the hardware in circuit.Optocoupler conduct
The key components of UART communication, the performance parameter (the especially current transfer ratio value of optocoupler) of optocoupler affect UART communication electricity
The communication quality on road.
As shown in Figure 1, be traditional UART light-coupled isolation communicating circuit, the circuit when carrying out data transmission, chip (from
Machine dsp chip or host dsp chip) low and high level for receiving signal is identified, if level value is greater than 2.0V,
It is considered high level；If level value is less than 0.8V, then it is assumed that be low level；If level value is in 0.8V-2.0V
Between, then the level is invalid signals, can not be identified by chip.When the performance parameter of optocoupler is in normal range (NR), optocoupler is exported
The low level signal voltage value at end can be less than 0.8V.
But when the current transfer ratio of optocoupler value is on the lower side in limited time, the low level signal voltage value of optocoupler output is by environment
Temperature influence is very big, i.e., when environment temperature increases, the level signal voltage value after optocoupler can become larger, at this point for process
Low level signal voltage value after optocoupler can high probability there is a situation where being greater than 0.8V so that the level signal becomes believing in vain
Number, chip can not identify the level signal, lead to communication failure.
Utility model content
In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of temperature-compensation circuit,
Communicating circuit, UART communicating circuit and smart machine, the temperature-compensation circuit structure is simple, is able to solve communicating circuit due to temperature
Communication failure caused by degree changes, improves the reliability of communication.
In order to achieve the above object, the utility model adopts the following technical solution: a kind of temperature-compensation circuit, comprising:
Operational amplifier；
The input terminal of the operational amplifier and the output end of input signal circuit connect；
The output end of the operational amplifier is connect with the input terminal for receiving circuit；
The operational amplifier, for amplifying processing to input signal, to complete the temperature-compensating to input signal.
Optionally, when the numerical value of the input signal and ambient temperature value are proportional, the operational amplifier
Amplification factor is less than 1.
Optionally, when the input signal is input voltage, the temperature-compensation circuit further include:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same of the operational amplifier
Phase input terminal；
Input resistance, one end connect the inverting input terminal of the operational amplifier, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier, and the reverse phase that the other end connects operational amplifier is defeated
Enter end.
Optionally, in the bleeder circuit, input resistance and feedback loop at least one include variable resistance.
Optionally, when the input resistance is variable resistance, the input resistance is that resistance value is directly proportional to environment temperature
The thermistor of relationship.
Optionally, the bleeder circuit includes first resistor and second resistance；
Wherein, one end of the first resistor is connect with the access point of the input signal, and the other end connects the operation
The non-inverting input terminal of amplifier；One end of the second resistance connects the non-inverting input terminal of the operational amplifier, another termination
Ground；
If the first resistor is variable resistance, the first resistor is that resistance value and environment temperature are proportional
Thermistor；Alternatively,
If the second resistance is variable resistance, the second resistance be resistance value and environment temperature inversely
Negative tempperature coefficient thermistor.
Optionally, when the feedback loop includes variable resistance, the feedback loop include: resistance value and environment temperature at
The negative tempperature coefficient thermistor of inverse relation.
Optionally, the feedback loop further include: adjustable resistor.
The utility model additionally provides a kind of communicating circuit, comprising:
Input signal circuit receives circuit, and such as the described in any item temperature-compensation circuits in front；
Wherein, the temperature-compensation circuit, the signal for exporting to the input signal circuit carry out temperature-compensating, obtain
Output signal after to temperature-compensating；
Circuit is received, for receiving and recognizing to the output signal after the temperature-compensating.
Optionally, the input signal circuit includes: optocoupler；
The reception circuit includes: for receiving signal and identifying that receiving signal is high level or low level DSP core
Piece.
The utility model additionally provides a kind of UART communicating circuit, comprising:
First temperature-compensation circuit, second temperature compensation circuit, main dsp chip, from dsp chip, the first optocoupler and second
Optocoupler；
First temperature-compensation circuit and the second temperature compensation circuit are such as the described in any item temperature in front
Compensation circuit；The main dsp chip and from dsp chip be used to emit and identify receive signal；
Wherein, first optocoupler input is connected with the emission port of the main dsp chip, output end and described first
The input terminal of temperature-compensation circuit is connected；The output end of first temperature-compensation circuit and the receiving end from dsp chip
Mouth is connected；
Second optocoupler input is connected with described from the emission port of dsp chip, output end and the second temperature
The input terminal of compensation circuit is connected；The receiving port phase of the output end of the second temperature compensation circuit and the main DSP chip
Even.
The utility model additionally provides a kind of smart machine, comprising:
Such as the described in any item communicating circuits in front.
The utility model uses above technical scheme, the temperature-compensation circuit, comprising: operational amplifier；The operation
The input terminal of amplifier and the output end of input signal circuit connect；The output end of the operational amplifier is defeated with reception circuit
Enter end connection；The operational amplifier, for amplifying processing to input signal, to complete the temperature benefit to input signal
It repays.The communicating circuit, comprising: input signal circuit receives circuit, and temperature-compensation circuit as elucidated before.It is described defeated
Entering signal circuit can be optocoupler, and the utility model is by increasing a temperature-compensation circuit in optocoupler rear end, since temperature is mended
Temperature-compensating can be carried out to the output signal of optocoupler by repaying circuit, it is thus possible to alleviate temperature to the anomalous effects of communicating circuit,
So as to solving UART communication failure caused by temperature increases, the low of communicating circuit optocoupler output when the temperature rises ensure that
Level signal can be received circuit and read identification, greatly improve the reliability of communication.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the utility model traditional UART light-coupled isolation communicating circuit described in background technology；
Fig. 2 is the structural schematic diagram that the utility model temperature-compensation circuit embodiment one provides；
Fig. 3 is the structural schematic diagram that the utility model temperature-compensation circuit embodiment two provides；
Fig. 4 is the structural schematic diagram that the utility model temperature-compensation circuit embodiment three provides；
Fig. 5 is the structural schematic diagram that the utility model temperature-compensation circuit example IV provides；
Fig. 6 is the structural schematic diagram that the utility model temperature-compensation circuit embodiment five provides；
Fig. 7 is the structural schematic diagram that the utility model communicating circuit embodiment one provides；
Fig. 8 is the structural schematic diagram of the utility model UART communicating circuit.
In figure: 1, operational amplifier；2, temperature-compensation circuit；3, input signal circuit；4, circuit is received.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
As shown in Fig. 2, as a kind of embodiment of temperature-compensation circuit of the utility model, the temperature of the offer of embodiment one
Compensation circuit, comprising:
Operational amplifier 1；
The input terminal of the operational amplifier 1 is connect with the output end of input signal circuit 3；
The output end of the operational amplifier 1 is connect with the input terminal for receiving circuit 4；
The operational amplifier 1, for amplifying processing to input signal, to complete the temperature benefit to input signal
It repays.
Further, when the numerical value of the input signal and ambient temperature value are proportional, the operational amplifier 1
Amplification factor less than 1.
As shown in figure 3, the embodiment as the utility model another kind temperature-compensation circuit, the temperature that embodiment two provides
Spend compensation circuit 2, comprising: operational amplifier 1；
Further, when the numerical value of the input signal and ambient temperature value are proportional, the operational amplifier 1
Amplification factor less than 1.
Further, when the input signal is input voltage, further includes:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same of the operational amplifier 1
Phase input terminal V1；
Input resistance, one end connect the inverting input terminal of the operational amplifier 1, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier 1, and the other end connects the reverse phase of operational amplifier 1
Input terminal V2.
The bleeder circuit includes first resistor R2 and second resistance R3, the first resistor R2 and second resistance R3 are
The resistance of fixed resistance value；
The feedback loop further include: adjustable resistor Rw.
The working principle of the embodiment is illustrated below:
For example, the output signal U i of the optocoupler is through the first resistor R2 when input signal circuit 3 includes optocoupler
After second resistance R3 partial pressure switch, the voltage signal after partial pressure is inputted to the non-inverting input terminal V1 of the operational amplifier 1, institute
The voltage for stating the inverting input terminal V2 of operational amplifier 1 is (electric with the proportional temperature-sensitive of environment temperature by variable resistance Rt1
Resistance) and adjustable resistor Rw determine, can be obtained according to the short empty concept of breaking of the void of operational amplifier 1, V1=V2.As shown in Figure 3:
Again by V1=V2；
It can be concluded that the relational expression of the output signal U o of the output signal U i of the optocoupler and the operational amplifier 1,
Uo=A*Ui；
Wherein,
When the temperature increases, the resistance value of variable resistance Rt1 can become larger, so that amplification factor becomes smaller, it is adjustable along with adjusting
Economize on electricity resistance Rw, can be limited to the value of amplification factor A 1 hereinafter, can thus allow the output signal U o of operational amplifier 1 with Ui
Raising and become smaller.The variable resistance Rt1 can be platinum resistance thermometer sensor, since platinum resistance thermometer sensor, is in 0-100 DEG C of this temperature range
With good linear (with the raising of temperature, resistance value becomes larger platinum resistance thermometer sensor), so it is used in this temperature-compensation circuit 2
Good compensating action can be played.
Become larger using the resistance value of variable resistance Rt1 with the raising of temperature, and using adjustable resistance Rw is adjusted, can made described
The amplification factor A of operational amplifier 1 is less than 1, to realize that the signal that exports to the optocoupler carries out diminution processing, makes that treated
Optocoupler output signal can be received circuit 4 and be received and identified, and solve communication failure caused by temperature increases.
It is understood that input signal circuit 3 described in the present embodiment refers to that all are affected by temperature and believe output
Number changed circuit, is not limited only to only optocoupler.
As shown in figure 4, the embodiment three as the utility model temperature-compensation circuit, base of the embodiment in embodiment one
On plinth, the temperature-compensation circuit 2 further include:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same of the operational amplifier 1
Phase input terminal V1；
Input resistance R1, one end connect the inverting input terminal V2 of the operational amplifier 1, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier 1, and the other end connects the reverse phase of operational amplifier 1
Input terminal V2.
Wherein, the bleeder circuit includes first resistor and second resistance R3；
The first resistor is variable resistance Rt2, then the variable resistance Rt2 is that resistance value and environment temperature are proportional
Thermistor；The second resistance R3 and input resistance R1 is the resistance of fixed resistance value.
Wherein, one end of the variable resistance Rt2 connects the access point of the input signal, and the other end connects the operation
The non-inverting input terminal of amplifier 1；One end of the second resistance R3 connects the non-inverting input terminal of the operational amplifier 1, another
End ground connection.
The feedback loop further include: adjustable resistor Rw.
The working principle of the embodiment is illustrated below:
For example, the output signal U i of the optocoupler is through the variable resistance when input signal circuit 3 includes optocoupler
After Rt2 (the proportional thermistor with environment temperature) and second resistance R3 partial pressure switch, by the voltage signal after partial pressure
The voltage of the non-inverting input terminal V1, the inverting input terminal V2 of the operational amplifier 1 of the operational amplifier 1 are inputted by input electricity
R1 and adjustable resistor Rw is hindered to determine, can be obtained according to the short empty disconnected concept of the void of operational amplifier 1, V1=V2.As shown in Figure 4:
Again by V1=V2；
It can be concluded that the relational expression of the output signal U o of the output signal U i of the optocoupler and the operational amplifier 1,
Uo=A*Ui；
Wherein,
When the temperature increases, the resistance value of variable resistance Rt2 can become larger, so that amplification factor becomes smaller, it is adjustable along with adjusting
Economize on electricity resistance Rw, can be limited to the value of amplification factor A 1 hereinafter, can thus allow the output signal U o of operational amplifier 1 with Ui
Raising and become smaller.The variable resistance Rt2 can be platinum resistance thermometer sensor, since platinum resistance thermometer sensor, is in 0-100 DEG C of this temperature range
With good linear (with the raising of temperature, resistance value becomes larger platinum resistance thermometer sensor), so it is used in this temperature-compensation circuit 2
It can play good compensating action, realize that the signal exported to the optocoupler carries out diminution processing, making that treated, optocoupler is defeated
Signal can be received circuit 4 and be identified out, solve communication failure caused by temperature increases.
As shown in figure 5, the example IV as the utility model temperature-compensation circuit, base of the embodiment in embodiment one
On plinth, the temperature-compensation circuit further include:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same of the operational amplifier 1
Phase input terminal V1；
Input resistance R1, one end connect the inverting input terminal V2 of the operational amplifier 1, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier 1, and the other end connects the reverse phase of operational amplifier 1
Input terminal V2.
Wherein, the bleeder circuit includes first resistor R2 and second resistance；
The second resistance is variable resistance Rt3, then the variable resistance Rt3 be resistance value and environment temperature inversely
Thermistor；The first resistor R2 and input resistance R1 is the resistance of fixed resistance value.
Wherein, one end of the first resistor R2 connects the access point of the input signal, and the other end connects the operation
The non-inverting input terminal of amplifier 1；One end of the variable resistance Rt3 connects the non-inverting input terminal of the operational amplifier 1, another
End ground connection.
The feedback loop further include: adjustable resistor Rw.
The working principle of the embodiment is similar with the working principle of embodiment two or implementation three, for example, input signal circuit 3
When including optocoupler, specific working principle are as follows:
The output signal U i of the optocoupler (is inversely proportional pass through the second resistance R2 and variable resistance Rt3 with environment temperature
The thermistor of system) after partial pressure switch, the voltage signal after partial pressure is inputted to the non-inverting input terminal V1 of the operational amplifier 1,
The voltage of the inverting input terminal V2 of the operational amplifier 1 is determined by input resistance R1 and adjustable resistor Rw, according to operation
The short empty disconnected concept of the void of amplifier 1 can obtain, V1=V2.As shown in Figure 5:
Again by V1=V2；
It can be concluded that the relational expression of the output signal U o of the output signal U i of the optocoupler and the operational amplifier 1,
Uo=A*Ui；
Wherein,
When the temperature increases, the resistance value of variable resistance Rt3 can become smaller, so that amplification factor becomes smaller, it is adjustable along with adjusting
Economize on electricity resistance Rw, can be limited to the value of amplification factor A 1 hereinafter, can thus allow the output signal U o of operational amplifier 1 with Ui
Raising and become smaller, the signal for enabling operational amplifier 1 to export is received circuit 4 and is identified, solves caused by temperature increases
Communication failure.
As shown in fig. 6, the embodiment five as the utility model temperature-compensation circuit, base of the embodiment in embodiment one
On plinth, the temperature-compensation circuit 2 further include:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same of the operational amplifier 1
Phase input terminal V1；
Input resistance R1, one end connect the inverting input terminal V2 of the operational amplifier 1, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier 1, and the other end connects the reverse phase of operational amplifier 1
Input terminal V2.
Wherein, the bleeder circuit includes first resistor R2 and second resistance R3；
The input resistance R1, first resistor R2 and second resistance R3 are the resistance of fixed resistance value.
Wherein, one end of the first resistor R2 connects the access point of the input signal, and the other end connects the operation
The non-inverting input terminal of amplifier 1；One end of the second resistance R3 connects the non-inverting input terminal of the operational amplifier 1, another
End ground connection.
The feedback loop includes: adjustable resistor Rw, may also include variable resistance Rt4, and the variable resistance Rt4 is resistance
Value and the negative tempperature coefficient thermistor of environment temperature inversely.
The working principle of the embodiment and embodiment two are similar to the working principle for implementing four, and specific calculating process is herein not
It repeats, can finally acquire again, the amplification factor A of the operational amplifier 1:
When the temperature increases, the resistance value of variable resistance Rt4 can become smaller, so that amplification factor becomes smaller, it is adjustable along with adjusting
Economize on electricity resistance Rw, can be limited to the value of amplification factor A 1 hereinafter, can thus allow the output signal U o of operational amplifier 1 with Ui
Raising and become smaller, the signal for enabling operational amplifier 1 to export is received circuit 4 and is identified, solves caused by temperature increases
Communication failure.
The communicating circuit structure is simple, can greatly solve input signal circuit 3 because temperature raising leads to communication failure
The problem of, improve the reliability of communication.
It is understood that for above-described embodiment, during adjusting adjustable resistor Rw, in order to guarantee circuit
Safety, preventing the resistance value on the feedback loop is zero, can connect one with the adjustable resistance Rw on the feedback loop
A protective resistance Ro.
It is understood that variable resistance described in above-described embodiment be upperseat concept, including adjustable resistor with
And the thermistor varied with temperature；The adjustable resistor can be slide rheostat.
As shown in fig. 7, the utility model additionally provides a kind of embodiment of communicating circuit, comprising:
Such as the described in any item temperature-compensation circuits 2 of embodiment one to five,
Input signal circuit 3 and reception circuit 4；
Wherein, the temperature-compensation circuit 2, the signal for exporting to the input signal circuit 3 carry out temperature-compensating,
Output signal after obtaining temperature-compensating；
Circuit 4 is received, for receiving and recognizing to the output signal after the temperature-compensating.
Further, the input signal circuit 3 includes: optocoupler；
The reception circuit 4 includes: for receiving signal and identifying that receiving signal is high level or low level DSP core
Piece.
In actual use, traditional UART light-coupled isolation communicating circuit is prescribed a time limit when the current transfer ratio value of optocoupler is on the lower side,
The low level signal of optocoupler output can become larger with the raising of environment temperature, believe at this point for the low level after optocoupler
Number voltage value can high probability there is a situation where being greater than 0.8V so that the level signal becomes invalid signals, chip can not be to this
Level signal is identified, communication failure is caused.
The present embodiment, when environment temperature increases, is passed through by increasing a temperature-compensation circuit 2 in the optocoupler rear end
Operational amplifier 1 in the temperature-compensation circuit 2 can (signal value, which be greater than dsp chip, to be known by signal that optocoupler exports
Other range), diminution processing (amplification factor of the operational amplifier 1 is less than 1) is carried out, the optocoupler output signal that makes that treated
It can be identified by dsp chip, solve communication failure caused by temperature increases.
It should be noted that the current transfer ratio value when the optocoupler is on the lower side in limited time, when high temperature the optocoupler output letter
Number it can become larger with the raising of environment temperature, at this point, the numerical value of the output signal of the optocoupler is directly proportional to ambient temperature value
Relationship, the low level signal after optocoupler can become larger, so that becoming the unrecognized invalid signals of dsp chip, cause to communicate
Failure, the present embodiment are exactly such problem solved；And in low temperature, the variation of the output signal of the optocoupler by environment temperature
Very little is influenced, directly proportional relationship is not present to ambient temperature value in the numerical value of the output signal of the optocoupler at this time.
As shown in figure 8, the utility model additionally provides a kind of UART communicating circuit, comprising:
First temperature-compensation circuit, second temperature compensation circuit, main dsp chip, from dsp chip, the first optocoupler and second
Optocoupler；
First temperature-compensation circuit and the second temperature compensation circuit are such as any one of embodiment one to five institute
The temperature-compensation circuit 2 stated；The main dsp chip and from dsp chip be used to emit and identify receive signal；
The communicating circuit may also include that the first primary resistance, the second primary resistance, the first secondary resistance, second subprime electricity
Resistance and power supply；
Wherein, the cathode of first optocoupler input is connected with the emission port of the main dsp chip, and anode passes through institute
The first primary resistance is stated to be connected with the power supply；
First optocoupler output is connected with the input terminal of first temperature-compensation circuit；First temperature-compensating
The output end of circuit is connected with described from the receiving port of dsp chip；First optocoupler output also passes through the first time
Grade resistance is connected with power supply；
The cathode of second optocoupler input is connected with described from the emission port of dsp chip, and anode passes through described the
Two primary resistance are connected with the power supply；
Second optocoupler output is connected with the input terminal of the second temperature compensation circuit；The second temperature compensation
The output end of circuit is connected with the receiving port of the main dsp chip；Second optocoupler output also passes through described second
Grade resistance is connected with power supply.
It is understood that in Fig. 8, when host dsp chip transmits number to slave DSP chip by UART communicating circuit
According to when, the transmission data on host dsp chip are sent to the first optocoupler via the port Tx_1, and then the first optocoupler exports signal
To the first temperature-compensation circuit, the signal of the first optocoupler output is affected by temperature, when the current transfer ratio value of the first optocoupler
Limit on the lower side, and when temperature increases, the low level signal of the first optocoupler output can cannot be by slave dsp chip since numerical value becomes larger
Identification.The optocoupler output signal to have become larger can be reduced, be made by the first temperature-compensation circuit described in through this embodiment
The signal of first temperature-compensation circuit output can be identified by slave dsp chip, realize normal communication.
Similarly, when slave dsp chip uploads data to host dsp chip by UART communicating circuit, slave dsp chip
On transmission data be sent to the second optocoupler via the port Tx, then the second optocoupler by signal export to second temperature compensate electricity
The signal on road, the output of the second optocoupler is affected by temperature, when the current transfer ratio of the second optocoupler is worth limit on the lower side, and temperature raising
When, the low level signal of the second optocoupler output can cannot be identified since numerical value becomes larger by slave dsp chip.Through this embodiment
Described in second temperature compensation circuit, the optocoupler output signal to have become larger can be reduced, make second temperature compensation circuit
The signal of output can be identified by host dsp chip, realize normal communication.
In addition, the utility model additionally provides a kind of smart machine, comprising:
Communicating circuit as described in any embodiment of front.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that term " first ", " second " etc. are used for description purposes only in the description of the present invention,
It is not understood to indicate or imply relative importance.In addition, in the description of the present invention, unless otherwise indicated, it is " more
It is a " meaning refer at least two.
It should be appreciated that each section of the utility model can be realized with hardware, software, firmware or their combination.?
In above embodiment, what multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Software or firmware are realized.It, and in another embodiment, can be with known in this field for example, if realized with hardware
Any one of following technology or their combination realize: there is the logic gate for realizing logic function to data-signal
The discrete logic of circuit, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA),
Field programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, can integrate in a processing module in each functional unit in each embodiment of the utility model,
It can be each unit to physically exist alone, can also be integrated in two or more units in a module.It is above-mentioned integrated
Module both can take the form of hardware realization, can also be realized in the form of software function module.The integrated mould
If block is realized and when sold or used as an independent product in the form of software function module, it also can store and counted at one
In calculation machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (12)
1. a kind of temperature-compensation circuit characterized by comprising
Operational amplifier；
The input terminal of the operational amplifier and the output end of input signal circuit connect；
The output end of the operational amplifier is connect with the input terminal for receiving circuit；
The operational amplifier, for amplifying processing to input signal, to complete the temperature-compensating to input signal.
2. circuit according to claim 1, which is characterized in that the input signal numerical value and ambient temperature value at just
When than relationship, the amplification factor of the operational amplifier is less than 1.
3. circuit according to claim 1, which is characterized in that when the input signal is input voltage, the temperature
Compensation circuit further include:
Bleeder circuit, input terminal connect the access point of the input signal, and output end connects the same mutually defeated of the operational amplifier
Enter end；
Input resistance, one end connect the inverting input terminal of the operational amplifier, other end ground connection；
Feedback loop, one end connect the output end of the operational amplifier, and the other end connects the inverting input terminal of operational amplifier.
4. circuit according to claim 3, which is characterized in that in the bleeder circuit, input resistance and feedback loop extremely
Rare one includes variable resistance.
5. circuit according to claim 3, which is characterized in that when the input resistance is variable resistance, the input
Resistance is resistance value and the proportional thermistor of environment temperature.
6. circuit according to claim 3, which is characterized in that the bleeder circuit includes first resistor and second resistance；
Wherein, one end of the first resistor is connect with the access point of the input signal, and the other end connects the operation amplifier
The non-inverting input terminal of device；One end of the second resistance connects the non-inverting input terminal of the operational amplifier, other end ground connection；
If the first resistor is variable resistance, the first resistor is resistance value and the proportional temperature-sensitive of environment temperature
Resistance；Alternatively,
If the second resistance is variable resistance, the second resistance is resistance value and the subzero temperature of environment temperature inversely
Spend coefficient resistance.
7. circuit according to claim 3, which is characterized in that described anti-when the feedback loop includes variable resistance
Being fed back to road includes: resistance value and the negative tempperature coefficient thermistor of environment temperature inversely.
8. according to the described in any item circuits of claim 3-7, which is characterized in that the feedback loop further include: adjustable economize on electricity
Resistance.
9. a kind of communicating circuit characterized by comprising
Input signal circuit receives circuit, and such as the described in any item temperature-compensation circuits of claim 1-7；
Wherein, the temperature-compensation circuit, the signal for exporting to the input signal circuit carry out temperature-compensating, obtain temperature
Spend compensated output signal；
Circuit is received, for receiving and recognizing to the output signal after the temperature-compensating.
10. circuit according to claim 9, which is characterized in that the input signal circuit includes: optocoupler；
The reception circuit includes: for receiving signal and identifying that receiving signal is high level or low level dsp chip.
11. a kind of UART communicating circuit characterized by comprising
First temperature-compensation circuit, second temperature compensation circuit, main dsp chip, from dsp chip, the first optocoupler and the second optocoupler；
First temperature-compensation circuit and the second temperature compensation circuit are such as the described in any item temperature of claim 1-7
Spend compensation circuit；The main dsp chip and from dsp chip be used to emit and identify receive signal；
Wherein, first optocoupler input is connected with the emission port of the main dsp chip, output end and first temperature
The input terminal of compensation circuit is connected；The output end of first temperature-compensation circuit and the receiving port phase from dsp chip
Even；
Second optocoupler input is connected with described from the emission port of dsp chip, and output end and the second temperature compensate
The input terminal of circuit is connected；The output end of the second temperature compensation circuit is connected with the receiving port of the main dsp chip.
12. a kind of smart machine characterized by comprising
Such as the described in any item communicating circuits of claim 9-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821152754.9U CN208656724U (en) | 2018-07-19 | 2018-07-19 | Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821152754.9U CN208656724U (en) | 2018-07-19 | 2018-07-19 | Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208656724U true CN208656724U (en) | 2019-03-26 |
Family
ID=65785282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821152754.9U Active CN208656724U (en) | 2018-07-19 | 2018-07-19 | Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208656724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718189A (en) * | 2018-07-19 | 2018-10-30 | 珠海格力电器股份有限公司 | Temperature-compensation circuit and communicating circuit |
-
2018
- 2018-07-19 CN CN201821152754.9U patent/CN208656724U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108718189A (en) * | 2018-07-19 | 2018-10-30 | 珠海格力电器股份有限公司 | Temperature-compensation circuit and communicating circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102662896B (en) | Method and device for automatically adjusting preemphasis parameter and/or equalization parameter | |
| CN201345060Y (en) | Negative feedback hysteresis comparator for controlling temperature | |
| CN102246419A (en) | Power detection circuit, transmitter, and power detection method | |
| CN104807561A (en) | Calibrating circuit and calibrating method for resistance-type temperature sensing chip | |
| CN208656724U (en) | Temperature-compensation circuit, communicating circuit, UART communicating circuit and smart machine | |
| WO2015144611A2 (en) | System and method for taking a passive measurement of a physical quantity wirelessly | |
| JPS6239926A (en) | Online type serial communication interface to current loop from computer | |
| CN205430254U (en) | Transmission rate 32Kbps~80Mbps receives and dispatches integrative SFP optical module | |
| CN108718189A (en) | Temperature-compensation circuit and communicating circuit | |
| CN106092358A (en) | A kind for the treatment of method and apparatus of resistance sensor signal | |
| CN106989844A (en) | A kind of data acquisition equipment and acquisition method | |
| CN103780303A (en) | Optical module and detection circuit thereof | |
| CN103746720B (en) | Wireless communication module method of adjustment | |
| CN102435782A (en) | Performance parameter online debugging circuit of micromechanical accelerometer | |
| CN101937242B (en) | Smart meter equipment-based temperature control device | |
| CN101350675B (en) | Threshold value detection circuit system for limiting amplifier | |
| CN115420395A (en) | Temperature transmitting circuit | |
| CN205121401U (en) | Electric current source suitable for big current power device testing arrangement | |
| CN207132989U (en) | A kind of data acquisition equipment | |
| CN201845245U (en) | Temperature control device based on smart electricity meter device | |
| CN210119687U (en) | AI intelligent sound control circuit of heating table | |
| CN207231657U (en) | A kind of temperature collection circuit with multi-protocols output | |
| CN207742692U (en) | A kind of contactless smart card FDT adaptive circuits | |
| CN208835473U (en) | A kind of wireless temperature measuring device for switch cabinet | |
| CN104482947B (en) | Mining Multiple typed sensor signal transmitting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |