CN207216455U - Temperature-control circuit - Google Patents
Temperature-control circuit Download PDFInfo
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- CN207216455U CN207216455U CN201721196526.7U CN201721196526U CN207216455U CN 207216455 U CN207216455 U CN 207216455U CN 201721196526 U CN201721196526 U CN 201721196526U CN 207216455 U CN207216455 U CN 207216455U
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Abstract
It the utility model is related to a kind of temperature-control circuit.Temperature-control circuit includes temperature collection circuit, reference circuit and compares feedback circuit；Comparing feedback circuit includes two inputs and two output ends, and two inputs connect temperature collection circuit and reference circuit respectively, and two output ends are respectively used to connect heater circuit and reset circuit；When temperature collection circuit exports a magnitude of voltage, by comparing feedback circuit, two level are exported, are respectively used to control the closing and unlatching of heater circuit and reset circuit.By said temperature control circuit, without setting SCM system, you can while temperature is controlled, the opening and closing of reset circuit are controlled in certain temperature range, greatly simplify the design of circuit.
Description
Technical field
Temperature control circuit technical field is the utility model is related to, more particularly to a kind of temperature-control circuit.
Background technology
In some applications, because the attribute of some devices, module itself limits, they can not open in certain temperature spot
It is dynamic, such as high temperature, low temperature.Therefore, it is necessary to be monitored to temperature, according to collection result before corresponding proper device operation is made
Heated up or cooled and control temperature, only when temperature just allows device to start in certain scope.Traditional scheme is adopted
With a single-chip computer control system, temperature signal is acquired, opened by the temperature signal and device, module that judge collection
Dynamic temperature point, start or close heater circuit, go the unlatching of control device, module again after suitable temperature is reached.Traditional
Temperature-control circuit needs the cooperation of software, global design complexity centered on single-chip microcomputer in its control.
Utility model content
Based on this, there is provided a kind of temperature-control circuit, solve the problems, such as temperature-control circuit complex designing.
A kind of temperature-control circuit, it is characterised in that including：Temperature collection circuit, reference circuit and compare feedback electricity
Road；
It is described that relatively feedback circuit includes two inputs and two output ends, described two inputs connect temperature respectively
Acquisition Circuit and reference circuit, described two output ends are respectively used to connect heater circuit and reset circuit；
It is described relatively to feed back according to the output voltage of temperature collection circuit and the comparative result of the output voltage of reference circuit
Output end that circuit is connected with heater circuit exports the first level signal, another output end output second electrical level signal, and described the
One level signal is used to turn off or on heater circuit, and the second electrical level signal is used to be turned on and off reset circuit.
Said temperature control circuit, by setting temperature collection circuit, reference circuit and comparing feedback circuit, according to temperature
The voltage of Acquisition Circuit output and the comparative result of reference circuit output voltage are spent, in two output ends of comparator feedback circuit
The first level and second electrical level are exported respectively, and unlatching or the pass of heater circuit are then controlled by first level signal
Close, control reset circuit to be turned on or off by the second electrical level signal, without setting the control chips such as single-chip microcomputer, that is, exist
While carrying out temperature control, the opening and closing of reset circuit are controlled within the scope of certain temperature, greatly simplify electricity
The design on road.
Brief description of the drawings
Fig. 1 is the schematic diagram of temperature-control circuit in an embodiment；
Fig. 2 is the schematic circuit of heater circuit in an embodiment；
Fig. 3 is the schematic circuit of reset circuit in an embodiment；
Fig. 4 is the schematic diagram of temperature-control circuit in another embodiment；
Fig. 5 is the schematic circuit of temperature-control circuit in an embodiment；
Fig. 6 is the hysteresis controlling curve schematic diagram of heater circuit in an embodiment；
Fig. 7 is the hysteresis controlling curve schematic diagram of reset circuit in an embodiment.
Embodiment
Further to illustrate the technological means taken of the utility model and the effect of acquirement, below in conjunction with the accompanying drawings and compared with
Good embodiment, to the technical scheme of the utility model embodiment, carry out clear and complete description.
Fig. 1 is the schematic diagram of temperature collection circuit in an embodiment, and as described in Figure 1, temperature collection circuit includes：
Temperature collection circuit 110, reference circuit 120 and comparator feedback circuit 130.The relatively feedback circuit 130 includes two
Input and two output ends, two output ends are respectively output end 1 and output end 2, and described two inputs connect temperature respectively
Acquisition Circuit 110 and reference circuit 120 are spent, output end 1 is used to connect heater circuit, and output end 2 is used to connect reset circuit.
According to the output voltage of temperature collection circuit 110 and the comparative result of the output voltage of reference circuit 120, the ratio
The first level signal is exported compared with the output end 1 that feedback circuit 130 is connected with heater circuit, another output end 2 exports second electrical level
Signal, first level signal are used to turn off or on heater circuit, and the second electrical level signal is used to be turned on and off again
Position circuit.
The temperature-control circuit of the present embodiment, by setting temperature collection circuit, reference circuit and comparing feedback circuit,
The voltage and the comparative result of reference circuit output voltage exported according to temperature collection circuit, at two of comparator feedback circuit
Output end exports the first level and second electrical level respectively, then by first level signal control heater circuit unlatching or
Person closes, and controls reset circuit to be turned on or off by the second electrical level signal, without setting the control chips such as single-chip microcomputer,
I.e. while temperature control is carried out, the opening and closing of reset circuit are controlled within the scope of certain temperature, are greatly simplified
The design of circuit.Wherein, heater circuit can be a kind of high/low level of reception, just export an operating voltage, control heating
The circuit of device work, reset circuit can be one and receive the circuit that high/low level just controls MCU to reset.
Fig. 2 is the schematic circuit of heater circuit in an embodiment, as shown in Fig. 2 heater circuit can include two
Resistance R14 and R15, and two triodes Q2 and Q3.Wherein, resistance R14 one end B be heater circuit input, i.e., with
The output end 1 for comparing feedback circuit 130 is connected, resistance R14 other end connecting triode Q2 base stage, resistance R15 one end
A direct voltage source and triode Q3 emitter stage, resistance R15 other end connecting triode Q3 base stage, three poles are connected simultaneously
Pipe Q2 colelctor electrode is connected with triode Q3 base stage, and triode Q2 grounded emitter, triode Q3 current collection extremely heats
The output end C of circuit.
When having high level input at B, triode Q2 conductings, and then triode Q3 is also switched on, and DC voltage is obtained at C
The voltage in source, for providing operating voltage for heater.
Fig. 3 is the schematic circuit of reset circuit in an embodiment, and reset circuit can include three resistance R16, R17
And R18, two capacitors C9 and C10, and NMOS tube (N-Metal-Oxide-Semiconductor, a N-type metal-oxygen
Compound-semiconductor) Q4.Wherein, resistance R16 one end is the input D of reset circuit, i.e. with comparator feedback circuit 130
Output end 2 is connected, and resistance R16 other end ground connection, capacitor C9 and resistance R16 are in parallel, capacitor C10 one end connection NMOS
Pipe Q4 drain electrode, capacitor C10 other end ground connection, resistance R17 one end connection NMOS tube Q4 drain electrode and the reset circuit
Output end E, resistance R17 the other end ground connection, resistance R18 one end connection dc source, resistance R18 the other end connection
NMOS tube Q4 source electrode, NMOS tube Q4 grid connection input D.
When having high level output at D, NMOS tube Q4 is turned on, and reseting controling signal is exported at E, for example, resetting control letter
The MCU of number control device resets.
Fig. 4 is the schematic diagram of temperature-control circuit in another embodiment, as shown in figure 4, described relatively feed back electricity
Compare feedback circuit and second including first and compare feedback circuit in road；The reference circuit includes the first reference circuit and the second ginseng
Examine circuit.
First compares feedback circuit, second compares feedback circuit and include input positive terminal and input negative terminal, first ginseng
Examine the input positive terminal that circuit connects the first comparator feedback circuit；Second reference circuit connects second comparator
The input positive terminal of feedback circuit；First compares feedback circuit, the second input negative terminal for comparing feedback circuit is all connected with temperature acquisition
Circuit.First compares feedback circuit, second compares feedback circuit and include a signal output part, and first compares feedback circuit
One output end 1 of the signal output part connection relatively feedback circuit, second compares the signal output termination institute of feedback circuit
State the output end 2 for comparing feedback circuit.
In the present embodiment, output end 1 and output end 2 can be made by setting two different feedback comparison circuits
Output level is different, for controlling different circuits to work.First comparison circuit possesses two hysteresis points, when temperature from high to low
Change, from low to high change export different voltage and control different circuit work.
In one embodiment, first compares feedback circuit and can be made up of the first feedback circuit and first comparator, and first
The both ends of feedback circuit connect the input positive terminal and output end of first comparator respectively, and the input positive terminal of first comparator is also connected with
First reference circuit, the input negative terminal connection temperature collection circuit of first comparator.
The first comparator exports first level signal, when the input positive terminal voltage of first comparator is less than input
During negative terminal voltage, first level is high level, wherein, the first level of high level, which is used to close, heats the circuit；When
When the input positive terminal voltage of first comparator is more than input negative terminal voltage, first level is low level, wherein, it is low level
First level is used to open heater circuit.
In another embodiment, second compares feedback circuit and can be made up of the second feedback circuit and the second comparator, and
The both ends of two feedback circuits connect the input positive terminal and output end of the second comparator respectively, and the input positive terminal of the second comparator also connects
Connect the second reference circuit, the input negative terminal connection temperature collection circuit of the second comparator.
Second comparator exports the second electrical level signal, when the input positive terminal voltage of the second comparator is less than input
During negative terminal voltage, the second electrical level is low level, wherein, low level second electrical level is used to open the reset circuit；When
When the input positive terminal voltage of second comparator is more than input negative terminal voltage, the second electrical level is high level, wherein, high level
Second electrical level is used to close the reset circuit.
Fig. 5 is temperature-control circuit schematic circuit in an embodiment, as shown in Figure 5, it is preferred that the first feedback circuit
For the part of dotted line frame in Fig. 56, including first resistor R1, the second feedback circuit is the part of dotted line frame 7 in Fig. 5, including second
Resistance R2,3rd resistor R3, the 4th resistance R4 and second resistance R2 described in the first triode Q1. one end connection dc source
VCC, other end connection 3rd resistor R3 one end；3rd resistor R3 one end is also connected with the current collection of the first triode Q1
Pole；The 3rd resistor R3 other end connects the second comparator U1B input positive terminal；The emitter stage of the first triode Q1 connects
Ground, the base stage of the first triode Q1 are connected with one end of the 4th resistance R4；The other end of the 4th resistance R4 connects
Connect the second comparator U1B output end.
In the present embodiment, the first feedback circuit is made up of first resistor R1, compared with forming hysteresis with first comparator U1A
Device, if the resistance parameter in first resistor R1 and the first reference circuit determines, then, two threshold value U can be formedT1And UT2
Wherein, UT2More than UT1.When the output voltage of temperature collection circuit changes from low to high, when the output voltage of temperature collection circuit
More than UT2When, then it is low level that the output end of first comparator, which exports the first level,；When temperature collection circuit output voltage from
High to Low change, the output voltage of temperature collection circuit are less than UT1When, then first comparator U1A output end exports the first level
For high level.Fig. 6 effect may finally be realized, when temperature less than T1 from when being increased to T2, U1A output voltage is from high level
It is changed into low level, when temperature higher than T2 from when being reduced to T1, U1A output voltage is changed into high level from low level, wherein high electricity
The unlatching for controlling heater circuit is put down, low level then closes heater circuit, so as to realize the control to temperature.
Similarly, the second feedback circuit and the second comparator U1B form hysteresis loop comparator, if R2, R3 in the second feedback circuit
And the second resistance parameter in reference circuit determines, then, the threshold value of the hysteresis loop comparator of formation is UT3And UT4, wherein,
UT4More than UT3.When the output voltage of temperature collection circuit changes from low to high, when the output voltage of temperature collection circuit is more than UT4
When, then the second comparator U1B output end output second electrical level is high level；When temperature collection circuit output voltage from height to
Low change, the output voltage of temperature collection circuit are less than UT3When, then the second comparator U1B output end output second electrical level is low
Level.Fig. 7 effect may finally be realized, when temperature less than T3 from when being increased to T4, U1B output voltage is changed into from low level
High level；When temperature higher than T4 from when being reduced to T3, U1B output voltage is changed into low level from high level, and wherein high level is used
In reset circuit described in control release, low level is used for the unlatching for controlling reset circuit, so as to realize that the MCU to controlled device is opened
The control closed.
Preferably, UT3<UT4<UT1<UT2, wherein, UT1、UT2、UT3And UT4T1, T2, T3 and T4 temperature are corresponded to respectively
When, the magnitude of voltage of temperature collection circuit output, by setting the resistance sizes in the first feedback circuit and the second feedback circuit
And first resistance sizes in reference circuit and the second reference circuit, above-mentioned parameter requirement can be reached, so ensured that multiple
The opening and closing of position circuit, all within the scope of suitable temperature, the equipment for ensureing to be reset is not damaged by.
In the present embodiment, this implementation is made using the control method of two hysteresis comparison curves in temperature-control circuit
The temperature-control circuit of example has stronger antijamming capability.
In one embodiment, first reference circuit is the part of dotted line frame 2 in Fig. 5, including：5th resistance R5,
Six resistance R6 and at least one capacitor bank into the first capacitor bank C7；One end connection direct current of the 5th resistance R5
Source, the other end of the 5th resistance R5 connect the first capacitor bank C7 and the 6th resistance R6 one end respectively,
The other end of the 6th resistance R6 connects the other end of the first capacitor bank C7, and the other end of the 6th resistance R6 is also
Ground connection；The common end of the 6th resistance R6 and the 5th resistance R5 is the output end of first reference circuit.
The parameter selection of the first reference circuit in the present embodiment, the present embodiment temperature-control circuit is had influence on to heating electricity
The control on road, filter capacitor is terminated by partial pressure method, and the two of dc source, make the voltage of output more accurate and steady
It is fixed.
In one embodiment, second reference circuit is the part of dotted line frame 3 in Fig. 5, including：7th resistance R7,
Eight resistance R8 and at least one capacitor bank into the second capacitor bank C2；One end connection direct current of the 7th resistance R7
Source, the other end of the 7th resistance R7 connect the second capacitor bank C8 and the 8th resistance R8, the 8th electricity respectively
The other end for hindering R8 connects the other end of the second capacitor bank C8, and the other end of the 8th resistance R8 is also grounded；It is described
8th resistance R8 and the 7th resistance R7 common end is the output end of second reference circuit.
The parameter selection of the second reference circuit in the present embodiment, has influence on the present embodiment temperature-control circuit to resetting electricity
The control on road, filter capacitors are terminated by partial pressure method, and the two of dc source VCC, make the voltage of output more accurate and
It is stable.
In one embodiment, the design of access circuit is included, the access circuit includes the first access circuit and second
Circuit is accessed, the first access circuit is used to the first feedback circuit with temperature collection circuit being connected, the second access electricity
Road is used to the second feedback circuit with temperature collection circuit being connected.
Preferably, the first access circuit of the part of dotted line frame 4 includes in Fig. 5：First access resistance R12, the first electric capacity C1
And the second electric capacity C2.One end connection the first access resistance R12 of first electric capacity C1 one end, first electric capacity
C1 other end ground connection；One end connection the first access resistance R12 of the second electric capacity C2 other end, second electricity
Hold C2 other end ground connection；One end of the first access resistance R12 connects the temperature collection circuit；The first access electricity
The other end for hindering R12 connects the input negative terminal of the first comparator U1A.
Preferably, the second access circuit of the part of dotted line frame 5 includes in Fig. 5：Second access resistance R13, the 3rd electric capacity C3
And the 4th electric capacity C4；One end connection the second access resistance R13 of 3rd electric capacity C3 one end, the 3rd electric capacity
C3 other end ground connection；One end connection the second access resistance R13 of the 4th electric capacity C4 other end, the 4th electricity
Hold C4 other end ground connection；One end of the second access resistance R13 connects the temperature collection circuit, the second access electricity
The other end for hindering R13 connects the input negative terminal of the second comparator U1B.
In one embodiment, a kind of temperature collection circuit is specifically given, including：Thermistor R, the 9th resistance R9, the 5th
Electric capacity C5 and the 6th electric capacity C6；One end of the thermistor R connects one end of the 9th resistance R9, the thermistor
The R other end connection DC source VCC, the 9th resistance R9 other end ground connection；The both ends of the 5th electric capacity C5 connect respectively
The DC source VCC and ground terminal are connect, the both ends of the 6th electric capacity C6 connect the both ends of the 9th resistance R9 respectively；Temperature-sensitive electricity
The one end for hindering R is the output end of temperature collection circuit.
In the present embodiment, thermistor R is temperature sensor, has that high sensitivity, operating temperature range be wide, volume
It is small, cost is low, stablizes the characteristics of high.The present embodiment selects the thermistor of negative temperature coefficient, i.e., is hindered with the reduction resistance of temperature
Value becomes big, and temperature signal is converted into electric signal output by partial pressure.By setting capacitor bank, the signal of collection is filtered
Ripple.
In one embodiment, in order that high level can be exported by comparing the output end of feedback circuit, in relatively feedback circuit
Two output ends connect a pull-up resistor R10 and pull-up resistor R11 respectively, the other end of pull-up resistor connect one it is positive
Dc source VCC.
Below in conjunction with specific embodiment, temperature-control circuit is illustrated.
Fig. 5 is the circuit diagram of temperature-control circuit in a specific embodiment, as shown in figure 5, the part in dotted line frame 1 is temperature
Acquisition Circuit is spent, the part in dotted line frame 2 is the first reference circuit, and the part in dotted line frame 3 is the second reference circuit, dotted line frame
Part in 4 is the first access circuit, and the part in dotted line frame 5 is the second access circuit, and the part in dotted line frame 6 is anti-for first
Current feed circuit, the part in dotted line frame 7 is the second feedback circuit.The A mouths of temperature collection circuit connect the A of the first access circuit respectively
The A mouths of mouth and the second access circuit.
By taking a specifically used scene as an example, by adjusting the parameter of temperature-control circuit in the present embodiment, make UT1、UT2、UT3
And UT4The temperature of temperature collection circuit collection is 0 DEG C, 9 DEG C, -18 DEG C and -8 DEG C corresponding to respectively.According to the utility model
The equipment local environment temperature of temperature-control circuit is changed into -6 DEG C, and now output end 1 exports high level, and output end 2 also exports height
Level, output end 1 control heater circuit to open, constant temperature rise, equipment normal work；If environment temperature is -19 DEG C, now
Output end 1 exports high level, and output end 2 exports low level, and output end 1 controls heater circuit to open, the control device of output end 2
MCU resets, and when temperature rises to -8 DEG C, output end 2 exports high level, control release reset circuit, and equipment starts normal work
Make, constant temperature rises, and when temperature is increased to 9 DEG C, output end 1 exports low level, and heater circuit is closed in control.
In summary, the temperature-control circuit of the present embodiment, controlled device can be controlled to reset in low temperature, protection is controlled
The safety of equipment, when temperature raises, the MCU of controlled device is controlled to open, moreover, the temperature-control circuit of the present embodiment is not required to
Want single-chip computer control system that temperature control can be achieved with resetting, simple in construction, cost is low.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
- A kind of 1. temperature-control circuit, it is characterised in that including：Temperature collection circuit, reference circuit and compare feedback circuit；It is described that relatively feedback circuit includes two inputs and two output ends, described two inputs connect temperature acquisition respectively Circuit and reference circuit, described two output ends are respectively used to connect heater circuit and reset circuit；According to the output voltage of temperature collection circuit and the comparative result of the output voltage of reference circuit, the relatively feedback circuit The output end being connected with heater circuit exports the first level signal, another output end output second electrical level signal, first electricity Ordinary mail number is used to turn off or on heater circuit, and the second electrical level signal is used to be turned on and off reset circuit.
- 2. temperature-control circuit according to claim 1, it is characterised in that the relatively feedback circuit compares including first Feedback circuit and second compares feedback circuit；The reference circuit includes the first reference circuit and the second reference circuit；First compares feedback circuit, second compares feedback circuit and include input positive terminal and input negative terminal, and described first with reference to electricity Road connects the input positive terminal of the first comparator feedback circuit；Second reference circuit connects the second comparator feedback The input positive terminal of circuit；First compares feedback circuit, the second input negative terminal for comparing feedback circuit is all connected with temperature collection circuit；First compares feedback circuit, second compares feedback circuit and include a signal output part, and first compares feedback circuit One output end of the signal output part connection relatively feedback circuit, second compares the signal output part connection institute of feedback circuit State another output end for comparing feedback circuit.
- 3. temperature-control circuit according to claim 2, it is characterised in that described first compare feedback circuit signal it is defeated Go out end and connect the heater circuit；Described first, which compares feedback circuit, includes：First feedback circuit and first comparator；The both ends of first feedback circuit The input positive terminal and output end of the first comparator are connected respectively；The input positive terminal of first comparator is also connected with first ginseng Examine circuit, the input negative terminal connection temperature collection circuit of first comparator；The first comparator exports first level signal, when the input positive terminal voltage of first comparator is less than input negative terminal During voltage, first level is high level, wherein, the first level of high level, which is used to close, heats the circuit；When first When the input positive terminal voltage of comparator is more than input negative terminal voltage, first level is low level, wherein, low level first Level is used to open heater circuit.
- 4. temperature-control circuit according to claim 3, it is characterised in that described second compare feedback circuit signal it is defeated Go out end and connect the reset circuit；Described second, which compares feedback circuit, includes：Second feedback circuit and the second comparator；The both ends of second feedback circuit The input positive terminal and output end of second comparator are connected respectively；The input positive terminal of second comparator is also connected with second ginseng Examine circuit, the input negative terminal connection temperature collection circuit of the second comparator；Second comparator exports the second electrical level signal, when the input positive terminal voltage of the second comparator is less than input negative terminal During voltage, the second electrical level is low level, wherein, low level second electrical level is used to open the reset circuit；When second When the input positive terminal voltage of comparator is more than input negative terminal voltage, the second electrical level is high level, wherein, the second of high level Level is used to close the reset circuit.
- 5. temperature-control circuit according to claim 4, it is characterised in thatFirst feedback circuit includes：First resistor；Second feedback circuit includes：Second resistance, 3rd resistor, the 4th resistance and the first triode；One end connection dc source of the second resistance, the other end connect one end of 3rd resistor；One end of 3rd resistor is also Connect the colelctor electrode of first triode；The other end of 3rd resistor connects the input positive terminal of the second comparator；Described first The grounded emitter of triode, the base stage of first triode are connected with one end of the 4th resistance；4th resistance The other end connect the second comparator output end.
- 6. temperature-control circuit according to claim 4, it is characterised in that described first, which compares feedback circuit, also includes the One access circuit, the input negative terminal of the first comparator connect temperature collection circuit by the described first access circuit；Described second, which compares feedback circuit, also includes the second access circuit, and the input negative terminal of second comparator passes through described the Two access circuit connection temperature collection circuits.
- 7. temperature-control circuit according to claim 6, it is characterised in thatThe first access circuit includes：First access resistance, the first electric capacity and the second electric capacity；One end of one end connection the first access resistance of first electric capacity, the other end ground connection of first electric capacity；Institute State the other end of one end connection the first access resistance of the second electric capacity, the other end ground connection of second electric capacity；One end of the first access resistance connects the temperature collection circuit；The other end connection institute of the first access resistance State the input negative terminal of first comparator；The second access circuit includes：Second access resistance, the 3rd electric capacity and the 4th electric capacity；One end of one end connection the second access resistance of 3rd electric capacity, the other end ground connection of the 3rd electric capacity；Institute State the other end of one end connection the second access resistance of the 4th electric capacity, the other end ground connection of the 4th electric capacity；One end of the second access resistance connects the temperature collection circuit, the other end connection institute of the second access resistance State the input negative terminal of the second comparator.
- 8. temperature-control circuit according to claim 2, it is characterised in thatFirst reference circuit includes：5th resistance, the 6th resistance and at least one capacitor bank into the first capacitor Group；One end connection dc source of 5th resistance, the other end of the 5th resistance connect first capacitor respectively One end of group and the 6th resistance, the other end of other end connection first capacitor bank of the 6th resistance, the described 6th The other end of resistance is also grounded；One end of 6th resistance is the output end of first reference circuit；Second reference circuit includes：7th resistance, the 8th resistance and at least one capacitor bank into the second capacitor Group；One end connection dc source of 7th resistance, the other end of the 7th resistance connect second capacitor respectively One end of group and the 8th resistance, the other end of the 8th resistance connects the other end of second capacitor bank, described The other end of 8th resistance is also grounded；One end of 8th resistance is the output end of second reference circuit.
- 9. according to any one of the claim 1-8 temperature-control circuits, it is characterised in that the temperature collection circuit includes： Thermistor, the 9th resistance, the 5th electric capacity and the 6th electric capacity；One end of the thermistor connects one end of the 9th resistance, and the other end of the thermistor connects DC source, The other end ground connection of 9th resistance；The both ends of 5th electric capacity connect the DC source and earth terminal respectively, and described The both ends of six electric capacity connect the both ends of the 9th resistance respectively；The thermistor is in the output end that the common connection end of the 9th resistance is the temperature collection circuit.
- 10. according to the temperature-control circuit described in claim any one of 1-8, it is characterised in that the relatively feedback circuit Two output ends are all connected with a pull-up resistor, the other end connection positive direct-current source of the pull-up resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721196526.7U CN207216455U (en) | 2017-09-15 | 2017-09-15 | Temperature-control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721196526.7U CN207216455U (en) | 2017-09-15 | 2017-09-15 | Temperature-control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207216455U true CN207216455U (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721196526.7U Expired - Fee Related CN207216455U (en) | 2017-09-15 | 2017-09-15 | Temperature-control circuit |
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| CN (1) | CN207216455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450627A (en) * | 2017-09-15 | 2017-12-08 | 京信通信系统（中国）有限公司 | Temperature-control circuit |
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2017
- 2017-09-15 CN CN201721196526.7U patent/CN207216455U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450627A (en) * | 2017-09-15 | 2017-12-08 | 京信通信系统（中国）有限公司 | Temperature-control circuit |
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