CN206960994U - A kind of temperature control voltage adjusting circuit - Google Patents
A kind of temperature control voltage adjusting circuit Download PDFInfo
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- CN206960994U CN206960994U CN201720596495.8U CN201720596495U CN206960994U CN 206960994 U CN206960994 U CN 206960994U CN 201720596495 U CN201720596495 U CN 201720596495U CN 206960994 U CN206960994 U CN 206960994U
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Abstract
The utility model discloses a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, second temperature measurement circuit, first analog comparator circuit, analog switching circuit, instrument discharge circuit, second analog comparator circuit, power input control circuit, power-switching circuit and subtraction circuit, it is different according to the temperature of the detection of the first temperature measurement circuit and the second temperature measurement circuit, caused voltage is different, voltage difference input instrument discharge circuit caused by the temperature difference is amplified, the target voltage and instrument amplification voltage of power-switching circuit output obtain feedback voltage through subtraction circuit, power-switching circuit adjusts the target voltage of output by the feedback voltage, the target voltage is used to adjust temperature equipment, adjust the temperature of the first space or second space.The temperature control voltage adjusting circuit that the utility model provides, circuit structure is simple, and stability and reliability are high, and the electric current increase of output strengthens its driving force, and the ripple of output voltage is small, improves regulating circuit operating efficiency.
Description
Technical field
It the utility model is related to voltage control technology field, and in particular to a kind of temperature control voltage adjusting circuit.
Background technology
In terms of precision instrument measurement, many high-precision electronic measuring instruments, it is required for working at a constant temperature.Temperature control
Precision govern the measurement accuracy of instrument, in temperature control system, gradual control is typically all taken, using interior temperature control and outer temperature control two
Individual controlling unit is controlled the accurate of measuring instrument operating temperature to realize.
Such as a kind of temperature control voltage adjusting circuit is disclosed in Chinese patent literature CN106502299A, including the first thermometric electricity
Road, the second temperature measurement circuit, the first analog comparator, analog switching circuit, instrument discharge circuit, the second analog comparator and
High pressure discharge circuit, different according to the measurement temperature of the first temperature measurement circuit and the second temperature measurement circuit, caused voltage is different, so as to
By the first analog comparator and analog switching circuit, voltage difference input instrument discharge circuit caused by the temperature difference is put
Greatly, by the voltage after amplification compared with the reference voltage of the second analog comparator, when difference is more than reference voltage, then cause
High pressure discharge circuit works, the voltage after output amplification, for adjusting temperature equipment so that the first temperature and second temperature tend to
Unanimously.The program controls the temperature in outer temperature control box body to be exchanged with environment temperature by voltage difference, so as to reach the balance temperature difference
Effect, circuit is fairly simple, and the stability and Reliability comparotive of circuit are high.But after the signal difference amplification for passing through sensor directly
High pressure amplifier is driven to realize pressure regulation, this method is although feasible, but there is also following weak point：
High pressure amplifier is all linear amplifier at present, and output current is small, and load capacity is not strong, therefore the temperature control in documents
Regulating circuit implementation method, the electric current that it is exported are small；Simultaneously as high pressure amplifier has been used so circuit caloric value is big, circuit work
Heat caused by itself also influences whether the data of temperature sensor when making, and causes regulating circuit operating efficiency low.
Utility model content
In view of this, the utility model embodiment provides a kind of temperature control voltage adjusting circuit, to solve temperature of the prior art
Control the problem of regulating circuit output current is small, and caloric value is big, and efficiency is low.
Therefore, the utility model embodiment provides following technical scheme：
The utility model embodiment provides a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, for measuring first
First temperature in space, first voltage is exported according to first temperature；Second temperature measurement circuit, for measuring the of second space
Two temperature, second voltage is exported according to the second temperature；First analog comparator circuit, two input input institute respectively
First voltage and the second voltage are stated, passes through the first voltage and the second voltage, its output end output first
Control signal；Analog switching circuit, its control terminal input first control signal, and two input inputs described the respectively
One voltage and the second voltage, two output end export the first differential voltage and respectively according to first control signal
Two differential voltages；Instrument discharge circuit, its first input end input first differential voltage, described in the input of its second input
Second differential voltage, its output end output meter amplification voltage；Second analog comparator circuit, its input input the instrument
Amplify voltage, the instrument is amplified into voltage compared with reference voltage, the second control signal is exported according to comparative result；Power supply is defeated
Enter control circuit, its control terminal inputs second control signal, and plant-grid connection or disconnected is controlled according to second control signal
Open；Power-switching circuit, its power input access the voltage of the power input control circuit output, its output end output mesh
Voltage is marked, the power-switching circuit also includes a voltage adjusting end, what the signal adjustment output end inputted according to voltage adjusting end exported
Target voltage；Subtraction circuit, two input inputs the instrument amplification voltage and the target voltage respectively, by institute
State target voltage and instrument amplification voltage does subtraction output feedback voltage, and the feedback voltage fed back to described
The voltage adjusting end of power-switching circuit, the power-switching circuit are adjusted according to the feedback voltage to the target voltage of output
It is whole.
Alternatively, the operation element of the power-switching circuit is DC-DC power source conversion device.
Alternatively, in second analog comparator circuit, when instrument amplification voltage is more than the reference voltage
When, second control signal is high level；When instrument amplification voltage is less than the reference voltage, second control
Signal is low level.
Alternatively, in the power input control circuit, when second control signal is high level, the power supply
Input control circuit closes；When second control signal is low level, the power input control circuit disconnects.
Alternatively, the power input control circuit includes gate-controlled switch.
Alternatively, the temperature control voltage adjusting circuit also includes：First voltage follows circuit, and the first voltage is through described first
First analog comparator circuit and the analog switching circuit are inputted after voltage follower circuit processing.
Alternatively, the temperature control voltage adjusting circuit also includes：Second voltage follows circuit, and the second voltage is through described second
Second analog comparator circuit and the analog switching circuit are inputted after voltage follower circuit processing.
Alternatively, the temperature control voltage adjusting circuit also includes：Tertiary voltage follows circuit, and the instrument is amplified described in voltage warp
Tertiary voltage inputs the subtraction circuit after following processing of circuit.
Alternatively, the temperature control voltage adjusting circuit also includes：Pressure limiting circuit, the instrument amplification voltage input institute after pressure limiting
State the second analog comparator circuit and the tertiary voltage follows circuit.
Alternatively, in the analog switching circuit, when the first voltage is more than the second voltage, first control
It is first differential voltage that signal processed, which controls the first voltage, and the second voltage is second differential voltage；Work as institute
When stating first voltage and being less than the second voltage, it is first differential electrical that first control signal, which controls the second voltage,
Pressure, the first voltage is second differential voltage.
Alternatively, the difference of first temperature and the second temperature, first differential voltage and described second poor
The difference of component voltage, linearly increase or linearly reduce.
Alternatively, the output end connection temperature equipment of the power-switching circuit, the temperature equipment are described for adjusting
First space or the temperature of the second space.
The utility model embodiment technical scheme, has the following advantages that：
The utility model embodiment provides a kind of temperature control voltage adjusting circuit, including the first temperature measurement circuit, the second temperature measurement circuit,
First analog comparator circuit, analog switching circuit, instrument discharge circuit, the second analog comparator circuit, power input control
Circuit, power-switching circuit and subtraction circuit, it is different according to the measurement temperature of the first temperature measurement circuit and the second temperature measurement circuit,
Caused voltage is different, so that by the first analog comparator circuit and analog switching circuit, voltage difference caused by the temperature difference is defeated
Enter instrument discharge circuit to be amplified, by the voltage after amplification compared with the reference voltage of the second analog comparator circuit, be on duty
Not great Yu reference voltage when, then cause power input control circuit closure, its export voltage by power-switching circuit output
Voltage after target voltage, the target voltage and the amplification of instrument discharge circuit forms feedback voltage, electricity by subtraction circuit
Power-switching circuit adjusts the target voltage of output by the feedback voltage, and the target voltage after the adjustment is set for adjusting temperature adjustment
It is standby, adjust the temperature of the first space or second space.The temperature control voltage adjusting circuit that the utility model embodiment provides, circuit structure letter
Single, stability and reliability are high, and the electric current increase of output strengthens its driving force, and the ripple of output voltage is small, improves tune
The operating efficiency of volt circuit.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a circuit structure diagram according to the temperature control voltage adjusting circuit of the utility model embodiment；
Fig. 2 is another circuit structure diagram according to the temperature control voltage adjusting circuit of the utility model embodiment.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
The connection of two element internals is can also be, can be wireless connection or wired connection.For the common skill of this area
For art personnel, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Conflict can is not formed to be combined with each other.
Embodiment 1
The utility model embodiment provides a kind of temperature control voltage adjusting circuit, and the temperature and second for adjusting the first space are empty
Between temperature, such as when measuring precision instrument, many high-precision electronic measuring instruments will work at a constant temperature, generally
Two links are controlled to realize the precision to measuring instrument operating temperature using interior space temperature control and exterior space temperature
Control, the temperature control voltage adjusting circuit that the utility model embodiment provides, for adjusting the temperature in the first space and second space, realize
Accurate control, improves regulating circuit operating efficiency.
Fig. 1 is according to a circuit structure diagram of the temperature control voltage adjusting circuit of the utility model embodiment, as shown in figure 1, should
Temperature control voltage adjusting circuit includes the first temperature measurement circuit 01, the second temperature measurement circuit 02, the first analog comparator circuit 03, analog switch electricity
Road 04, instrument discharge circuit 05, the second analog comparator circuit 06, power input control circuit 07, power-switching circuit 08, subtract
Method computing circuit 09, wherein：
First temperature measurement circuit 01, for measuring first temperature in the first space, first voltage is exported according to the first temperature, the
Two temperature measurement circuits 02, for measuring the second temperature of second space, second voltage, specifically, first are exported according to second temperature
Space can be inner space, and second space can be outport space, and in another embodiment, the first space can be with
It is exterior space, second space can be inner space, and the first temperature can be less than second temperature, can also be more than the second temperature
Degree.The first temperature measurement circuit 01 or the second temperature measurement circuit 02 herein can be realized by thermistor or temperature sensor, real
Existing conversion between temperature signal and voltage signal.
First analog comparator circuit 03, two input input above-mentioned first voltage and second voltage, passed through respectively
More above-mentioned first voltage and second voltage, its output end export the first control signal.Specifically, first analog comparator electricity
Road 03 includes a comparator, compares the first voltage and second voltage of input, if first voltage is more than second voltage,
First control signal of output is high level, if first voltage is less than second voltage, the first control signal exported is low
Level, this first control signal is then sent to analog switching circuit 04.
Analog switching circuit 04, its control terminal input above-mentioned first control signal, and two input inputs above-mentioned respectively
First voltage and second voltage, two output end export the first differential voltage and the second difference respectively according to the first control signal
Voltage.Analog switching circuit shares two output ends, and its effect is to fix voltage larger in first voltage and second voltage
Exported in an output end, and output end connection is the input that larger voltage signal is inputted in instrument discharge circuit 05,
It so just can guarantee that the difference one of two voltage signals inputted in instrument discharge circuit 05 is set on the occasion of will not be because of difference
Negative value and damage its internal components.
Specifically, in analog switching circuit, when first voltage is more than second voltage, the first control signal is high electricity
It is flat, the first differential voltage that first voltage is the output of the first output end is controlled, second voltage is the second of the second output end output
Differential voltage；When first voltage is less than second voltage, the first control signal is low level, controls second voltage as the first output
The first differential voltage of output is held, first voltage is the second differential voltage of the second output end output.So no matter first voltage
With the height of second voltage, the first differential voltage of the first output end output is all higher voltage among the two, the second output
Second differential voltage of end output is all relatively low voltage among the two.Wherein, the difference of the first temperature and second temperature, first
The difference of differential voltage and the second differential voltage, linearly increases or reduces, so by monitoring the first differential voltage and second
The difference can of differential voltage reflects the temperature gap of the first space and second space.
Instrument discharge circuit 05, its first input end input above-mentioned first differential voltage, and the input of its second input is above-mentioned
Second differential voltage, its output end output meter amplification voltage.Due to the effect of analog switching circuit 04, no matter first voltage is
It is no to be more than second voltage, the first differential voltage voltage always bigger among the two, therefore the first differential voltage is more than second
Differential voltage, therefore the difference between first input end and second input is always remained as on the occasion of so that instrument amplifier
Circuit 05 can be with normal work, and the difference of first differential voltage and the second differential voltage is after the amplification of instrument discharge circuit 05
Voltage is amplified by its output end output meter.
Second analog comparator circuit 06, its input input instrument amplification voltage, the instrument are amplified into voltage and base
Quasi- voltage ratio is compared with according to comparative result the second control signal of output.Reference voltage is a magnitude of voltage pre-set, this implementation
Voltage on the basis of 1.5V can be selected in example, when instrument amplification voltage is more than 1.5V, the second control signal is high level, power supply
Input control circuit 07 works；When instrument amplification voltage is less than or equal to 1.5V, the second control signal of output is low level,
Power input control circuit 07 does not work.In other embodiments, reference voltage can rationally be set, and be traditionally arranged to be 1-
2V。
Power input control circuit 07, its control terminal input the second control signal, and power supply is controlled according to the second control signal
It is switched in or out.Specifically, the power input control circuit 07 includes gate-controlled switch, the gate-controlled switch can be triode or
Metal-oxide-semiconductor, when the second control signal of its control terminal input is high level, gate-controlled switch controls the power input control circuit to close
Close, when the second control signal is low level, gate-controlled switch controls the power input control circuit to disconnect, so as to realize that temperature control is adjusted
The closed and disconnected of volt circuit.
Power-switching circuit 08, the voltage of the output of its power input access power input control circuit 07, its output end
Target voltage is exported, power-switching circuit also includes a voltage adjusting end, the signal adjustment output end output inputted according to voltage adjusting end
Target voltage.The effect of power-switching circuit 08 is will to input its voltage to export after decompression is handled, and this is exported
Voltage is sent to an input of subtraction circuit 09, another input input instrument amplification of subtraction circuit 09
Voltage, subtraction circuit 09 exports feedback voltage after the voltage that two inputs input is done into subtraction, and is sent to
To the voltage adjusting end of power-switching circuit 08, power-switching circuit 08 adjusts the target voltage of output according to the feedback voltage, makes it
It is eventually held in a voltage range, the target voltage is used for the power for adjusting temperature equipment, adjusts the first space or second
The temperature in space, the first temperature and second temperature is set to reach unanimity.In the present embodiment, the target voltage ranges are 6-12V, electricity
The operation element of power-switching circuit is DC-DC power source conversion device, and specific chip model is LMR14050.In other embodiment
In, the buck converter of other models can be used, specific target voltage adjusting range can also be according to actual use situation
Set.
Subtraction circuit 09, two input inputs instrument amplification voltage and target voltage respectively, by target voltage
Subtraction output feedback voltage is done with instrument amplification voltage, and the feedback voltage is fed back to the pressure regulation of power-switching circuit 08
End, power-switching circuit 08 are adjusted according to feedback voltage to the target voltage of output.Due to instrument amplification voltage be with
The temperature difference of first space and second space changes and changed, therefore the feedback voltage also can be with the first space and second space
Temperature difference change and change, decompression of feedback voltage that power-switching circuit 08 is gone out by the subtraction realization to target voltage
Handled with pressure regulation, target voltage adjusts voltage as power, can adjust the power of temperature equipment, temperature equipment is to the first space
Or the temperature of second space is adjusted so that the difference between the first temperature and second temperature reduces, until reaching unanimity.This
The temperature equipment at place can be provided in the fan between the first space and second space, and the rotating speed of fan is controlled by voltage,
The rotating speed of the temperature difference more big fan is faster so that the temperature difference of the first space and second space reduces.Temperature control voltage adjusting of the prior art
Circuit, the high stream amplifier of high pressure will be directly inputted after the signal difference amplification of sensor to realize the voltage of adjustment temperature equipment, due to
The high stream amplifier of high pressure is all linear amplifier at present, and the electric current of output is smaller, only 500mA, and load capacity is not strong, and because uses
The high stream amplifier of high pressure is so cause that circuit caloric value is big, and efficiency is low, therefore it is slow to adjust temperature, it is impossible in time by first
Space is consistent with the temperature adjustment of second space；And in the present embodiment, by power-switching circuit 08 according to subtraction electricity
The feedback voltage that road 09 exports is adjusted to the target voltage of output, and the output current of power-switching circuit can reach 5A, from
And current output capability is substantially increased, bearing power significantly improves, therefore can the temperature to the first space and second in time
The temperature in space is adjusted, and it is reached unanimity.
In order to reduce the impedance in temperature control voltage adjusting circuit, as shown in Fig. 2 in one alternate embodiment, temperature control voltage adjusting electricity
Road also follows circuit, second voltage to follow circuit and tertiary voltage to follow circuit including first voltage.Specifically, first voltage passes through
First voltage follows and the first analog comparator circuit 03 and analog switching circuit 04 is inputted after processing of circuit, and second voltage is through the
The first analog comparator circuit 03 of input and analog switching circuit 04 after the processing of two voltage follower circuits, instrument amplification voltage warp
Tertiary voltage inputs subtraction circuit 09 after following processing of circuit.The operation element of voltage follower circuit is voltage follower,
The input voltage of voltage follower and output voltage are identicals, i.e. the voltage amplification factor perseverance of voltage follower is less than and approached
In 1, voltage follower the advantages of it is that input impedance is high and output impedance is low, in general, input impedance can reach several megaohms
Nurse, and generally only several ohm of output impedance, it is even lower, therefore reduce the impedance in circuit using voltage follower.
The temperature control voltage adjusting circuit also includes pressure limiting circuit, as shown in Fig. 2 the instrument amplification electricity that magnifier 05 exports
The second analog comparator circuit 06 is inputted after pressure limiting circuit pressure limiting for pressure and tertiary voltage follows circuit.In the present embodiment, pressure limiting
The voltage limiting value of circuit is 3V, and it is in order to avoid due to input the second analog comparator electricity to carry out pressure limiting to instrument amplification voltage herein
The voltage on road 06 is excessive and damages its component, while makes feedback electric in order to avoid the voltage of input subtraction circuit is excessive
Existing negative value is extruded, DCDC power-switching circuits 08 is influenceed and the target voltage of output is adjusted according to feedback voltage.
In concrete implementation mode, the system power supply input of temperature control voltage adjusting circuit is DC28V, passes through power voltage step down chip
It is the device power supply in whole temperature control voltage adjusting circuit to be adjusted to DC5V, and DC28V directly powers for power input control circuit 07, such as
Shown in Fig. 2.It is mostly integrated chip additionally, due to comparator of the prior art, is provided with one or more comparator electricity
Road, therefore the first analog comparator 03 in the embodiment above and the second analog comparator 06 can pass through a comparison
Device chip IC realizes that the comparator chip internal is at least integrated with two comparator circuits.
Temperature control voltage adjusting circuit in the utility model embodiment, specific workflow are：First temperature measurement circuit 01 is used for
The temperature in confined space is detected, the second temperature measurement circuit is used to detect the environment temperature outside temperature control box, two temperature measurement circuit difference
Export first voltage and second voltage, first voltage equivalent simulation of input first after first voltage follows circuit to reduce impedance
Comparator circuit 03 and analog switching circuit 04, second voltage equivalent input the after second voltage follows circuit to reduce impedance
One analog comparator circuit 03 and analog switching circuit 04, the first control signal of the first analog comparator circuit 03 output are main
Control analog switching circuit 04 export voltage forever be on the occasion of.When the temperature in confined space and the reference temperature outside confined space
Difference is spent at 3 DEG C, and the first differential voltage and the pressure difference of the second differential voltage that analog switching circuit 04 exports are
0.0091V, with the temperature in confined space and the linear increase of the difference of the reference temperature outside confined space, the first differential voltage and the
The pressure difference of two differential voltages is linearly increased also with the change of temperature difference or linearly reduced, when temperature difference is 15 DEG C, the
The pressure difference of one differential voltage and the second differential voltage is 0.00271V.This voltage amplifies 164.8 times through instrument discharge circuit 05,
Instrument amplification voltage is obtained, the multiplication factor of instrument discharge circuit 05 can also be set as needed, be typically chosen 80-200
Times or so.The instrument amplifies control source pressure limiting circuit, and by its maximum to 3V is defined to, tertiary voltage follows circuit equivalent to export
Instrument amplification voltage (generally 1.5-3V) after pressure limiting, the instrument amplification voltage after pressure limiting also input the second simulation and compared
In device circuit 06, the reference voltage of the second analog comparator circuit 06 is set to 1.5V, and instrument amplification voltage after pressure limiting is more than
During 1.5V, the second analog comparator circuit 06 output high level signal, now power input control circuit 07 is enabled, DCDC power supplys
The input of conversion is powered, and DCDC starts working.When the instrument amplification voltage after pressure limiting is less than 1.5V, the second analog comparator
Circuit 06 exports low level signal, and now the input power-off of DCDC Power converts, DCDC are stopped.DCDC Power converts electricity
The voltage that road 08 exports follows the voltage of circuit output to do subtraction in subtraction circuit 09 and obtained instead with tertiary voltage
Feedthrough voltage, feedback voltage are input to the FB pin of DCDC power-switching circuits 08, i.e., the voltage adjusting end of above-mentioned power-switching circuit, made
The target voltage of the adjustment output of DCDC power-switching circuits 08 is between 6-12V, and the size of this voltage is with current temperature
Difference changes, and the electric current of output can reach 5A.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (12)
1. a kind of temperature control voltage adjusting circuit, including：First temperature measurement circuit, for measuring first temperature in the first space, according to described
First temperature exports first voltage；
Second temperature measurement circuit, for measuring the second temperature of second space, second voltage is exported according to the second temperature；
First analog comparator circuit, two input input the first voltage and the second voltage respectively, pass through ratio
The first voltage and the second voltage, its output end export the first control signal；
Analog switching circuit, its control terminal input first control signal, and two input inputs first electricity respectively
Pressure and the second voltage, two output end export the first differential voltage and second poor respectively according to first control signal
Component voltage；
Instrument discharge circuit, its first input end input first differential voltage, and its second input input described second is poor
Component voltage, its output end output meter amplification voltage；
Second analog comparator circuit, its input input the instrument amplification voltage, the instrument are amplified into voltage and benchmark
Voltage ratio is compared with according to comparative result the second control signal of output；
Characterized in that, also include：
Power input control circuit, its control terminal input second control signal, and electricity is controlled according to second control signal
Source is switched in or out；
Power-switching circuit, its power input access the voltage of the power input control circuit output, the output of its output end
Target voltage, the power-switching circuit also include a voltage adjusting end, the signal adjustment output end output inputted according to voltage adjusting end
Target voltage；
Subtraction circuit, two input inputs the instrument amplification voltage and the target voltage respectively, by the mesh
Mark voltage and instrument amplification voltage do subtraction output feedback voltage, and the feedback voltage is fed back into the power supply
The voltage adjusting end of change-over circuit, the power-switching circuit are adjusted according to the feedback voltage to the target voltage of output.
2. temperature control voltage adjusting circuit according to claim 1, it is characterised in that the operation element of the power-switching circuit is
DC-DC power source conversion device.
3. temperature control voltage adjusting circuit according to claim 1 or 2, it is characterised in that in second analog comparator circuit
In, when instrument amplification voltage is more than the reference voltage, second control signal is high level；When the instrument is put
When big voltage is less than the reference voltage, second control signal is low level.
4. temperature control voltage adjusting circuit according to claim 3, it is characterised in that in the power input control circuit, when
When second control signal is high level, the power input control circuit closure；When second control signal is low electricity
Usually, the power input control circuit disconnects.
5. temperature control voltage adjusting circuit according to claim 1, it is characterised in that the power input control circuit includes controllable
Switch.
6. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：First voltage follows circuit, described
First voltage follows through the first voltage inputs first analog comparator circuit after processing of circuit and the simulation is opened
Powered-down road.
7. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：Second voltage follows circuit, described
Second voltage follows through the second voltage inputs second analog comparator circuit after processing of circuit and the simulation is opened
Powered-down road.
8. temperature control voltage adjusting circuit according to claim 1, it is characterised in that also include：Tertiary voltage follows circuit, described
Instrument amplification voltage inputs the subtraction circuit after the tertiary voltage follows processing of circuit.
9. temperature control voltage adjusting circuit according to claim 8, it is characterised in that also include：Pressure limiting circuit, the instrument amplification
Voltage inputs second analog comparator circuit after pressure limiting and the tertiary voltage follows circuit.
10. temperature control voltage adjusting circuit according to claim 1, it is characterised in that in the analog switching circuit, when described
When one voltage is more than the second voltage, it is first differential voltage that first control signal, which controls the first voltage,
The second voltage is second differential voltage；When the first voltage is less than the second voltage, first control
It is first differential voltage that signal, which controls the second voltage, and the first voltage is second differential voltage.
11. temperature control voltage adjusting circuit according to claim 1, it is characterised in that first temperature and the second temperature
Difference, the difference of first differential voltage and second differential voltage, linearly increase or linearly reduce.
12. according to the temperature control voltage adjusting circuit any one of claim 1 or 2 or 4-11, it is characterised in that the power supply turns
The output end connection temperature equipment of circuit is changed, the temperature equipment is used for the temperature for adjusting first space or the second space
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596495.8U CN206960994U (en) | 2017-05-25 | 2017-05-25 | A kind of temperature control voltage adjusting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720596495.8U CN206960994U (en) | 2017-05-25 | 2017-05-25 | A kind of temperature control voltage adjusting circuit |
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| CN206960994U true CN206960994U (en) | 2018-02-02 |
Family
ID=61376128
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720596495.8U Withdrawn - After Issue CN206960994U (en) | 2017-05-25 | 2017-05-25 | A kind of temperature control voltage adjusting circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792624A (en) * | 2019-12-19 | 2020-02-14 | 北京德亚特应用科技有限公司 | Fan speed regulation circuit |
| CN115494900A (en) * | 2022-09-22 | 2022-12-20 | 上海概伦电子股份有限公司 | Reference voltage extension method, system, device, and computer-readable storage medium |
-
2017
- 2017-05-25 CN CN201720596495.8U patent/CN206960994U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792624A (en) * | 2019-12-19 | 2020-02-14 | 北京德亚特应用科技有限公司 | Fan speed regulation circuit |
| CN115494900A (en) * | 2022-09-22 | 2022-12-20 | 上海概伦电子股份有限公司 | Reference voltage extension method, system, device, and computer-readable storage medium |
| CN115494900B (en) * | 2022-09-22 | 2024-02-06 | 上海概伦电子股份有限公司 | Reference voltage expansion method, system, apparatus, and computer-readable storage medium |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180202 Effective date of abandoning: 20180824 |
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