CN207992859U - A kind of temperature compensated reference generative circuit - Google Patents
A kind of temperature compensated reference generative circuit Download PDFInfo
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- CN207992859U CN207992859U CN201721902973.XU CN201721902973U CN207992859U CN 207992859 U CN207992859 U CN 207992859U CN 201721902973 U CN201721902973 U CN 201721902973U CN 207992859 U CN207992859 U CN 207992859U
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- resistance
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- temperature
- reference voltage
- voltage generating
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Abstract
The utility model discloses a kind of temperature compensated reference generative circuit, including temperature measurement circuit and coupled reference voltage generating circuit, the temperature measurement circuit includes the bridge for measuring temperature of resistance R1, R2, the R3 connected clockwise and thermistor PT1 compositions；The resistance R1 and R2 is commonly connected to Vcc, resistance R2 and thermistor PT1 and is grounded jointly.Temperature measurement circuit generates the variation of electric current due to the difference of temperature, this curent change is transferred to reference voltage generating circuit, can make up the reference voltage generating circuit be affected by temperature and the variation of electric current that generates, realize the temperature-compensating to reference voltage generating circuit, and electronic bridge measurement high sensitivity, react timely to the compensation of reference voltage generating circuit soon, the voltage output of the entire circuit of stabilization that can be as possible.
Description
Technical field
The utility model belongs to integrated circuit fields, relates generally to a kind of temperature compensated reference generative circuit.
Background technology
Reference voltage refers to the thermal field (mixture of ice and water) that sensor is placed in 0 DEG C, in the item for passing to operating current (100 μ A)
Under part, the voltage value on sensor.Actually 0 voltage.It indicates that symbol is V (0), which demarcates when dispatching from the factory, due to
The temperature coefficient S of sensor is identical, then only it is to be understood that reference voltage value V (0), you can the sensor electricity on any temperature of seeking knowledge point
Pressure value, without being indexed to sensor.
Reference voltage source is the important component of Analogous Integrated Electronic Circuits, is required in many integrated circuits accurate and steady
Fixed voltage reference, such as analog-digital converter, digital analog converter, linear voltage regulator and switching regulator.The benchmark electricity used at present
There are mainly three types of potential source design methods：Bury Zener diode, XFET (external ions injection technotron) and band gap base
Reference voltage source, bandgap voltage reference include ambipolar and CMOS band gap references.Bury Zener diode reference voltage source and
XFET reference voltage sources all have the characteristics that precision is high, stability is good, but the manufacturing process of the two cannot be with standard CMOS work
Skill is compatible with, and the supply voltage for burying Zener diode a reference source is high, operating current is big, power consumption is big.
The key point of reference voltage source design is that precision is high, temperature drift is small, and bandgap voltage reference utilizes the band gap of silicon
As reference voltage, high-precision may be implemented, take the method for some temperature-compensatings, the base being hardly affected by temperature
Quasi- voltage, existing reference voltage generating circuit is all complex, and is easy to be influenced by temperature and generate Current Voltage
Variation.
Invention content
The purpose of this utility model is that：It is easy to be influenced and generate by temperature for existing reference voltage generating circuit
Current Voltage changes the problem for causing circuit unstable, proposes a kind of temperature compensated reference generative circuit
The technical solution adopted in the utility model is as follows：
A kind of temperature compensated reference generative circuit, including temperature measurement circuit and coupled reference voltage generate electricity
Road, the temperature measurement circuit include the bridge for measuring temperature of resistance R1, R2, the R3 connected clockwise and thermistor PT1 compositions；The electricity
Resistance R1 and R2 is commonly connected to Vcc, resistance R2 and thermistor PT1 and is grounded jointly.Temperature measurement circuit is produced due to the difference of temperature
The variation of raw electric current, this curent change are transferred to reference voltage generating circuit, can make up the reference voltage generating circuit by temperature
Degree influences and the variation of the electric current of generation, realizes the temperature-compensating to reference voltage generating circuit, and electronic bridge measurement sensitivity
Height reacts timely to the compensation of reference voltage generating circuit soon, the voltage output of the entire circuit of stabilization that can be as possible.
Preferably, the reference voltage generating circuit include operational amplifier and with the resistance R5 and two that is connected of its anode
The anode of pole pipe D1, the anode of the cathode and resistance R6 and diode D2 of the operational amplifier, the cathode and resistance of diode D2
One end of R7 connects；The cathode of the diode D1 is grounded jointly with the other end of resistance R7.
Preferably, the Icr parallel connections of adjustable constant-flow voltage source are equipped in the reference voltage bad student circuit, one end is connected to institute
The cathode of operational amplifier is stated, other end connection ground can guarantee that the electric current of branch is constant, minimize the electric current in compensation process
Change the fluctuation generated, stability is more preferable.
Preferably, the output end of the operational amplifier, which is connected to, loads and is connected between resistance R5 and R6, is formed
Feedback, can preferably ensure the stabilization of circuit output.
Preferably, the resistance R1 and thermistor PT1 of the temperature measurement circuit are commonly connected to the reference voltage and generate electricity
The cathode of the operational amplifier on road；The resistance R2 and R3 is commonly connected to the operational amplifier of the reference voltage generating circuit
Anode.
In conclusion by adopting the above-described technical solution, the utility model has the beneficial effects that：
1, in the utility model, using electronic bridge measurement, there is high sensitivity, react timely feature.
2, it is provided with adjustable constant-flow voltage source in the utility model, in reference voltage generating circuit, reduces temperature influence
And the current fluctuation generated, circuit output are more stable.
3, in the utility model, diode has protective effect, and when circuit damages, diode can play disconnection
The effect of circuit.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
As shown in Figure 1, a kind of temperature compensated reference generative circuit, including temperature measurement circuit and coupled benchmark
Voltage generation circuit, temperature measurement circuit generate the variation of electric current due to the difference of temperature, this curent change is transferred to reference voltage
Generation circuit, can make up the reference voltage generating circuit be affected by temperature and the variation of electric current that generates, realize to benchmark electricity
The temperature-compensating of generation circuit, and electronic bridge measurement high sensitivity are pressed, reaction is timely to the compensation of reference voltage generating circuit soon,
The voltage output of the entire circuit of stabilization that can be as possible；It is 1K that the temperature measurement circuit, which includes by resistance R1, R2 11K, R3 9.7K
With the bridge for measuring temperature of thermistor PT1 compositions, bridge balance when accessing voltage is waited, electric bridge is unbalance when the temperature varies
Generate compensation electric current；The temperature measurement circuit includes the thermometric of resistance R1, R2, the R3 connected clockwise and thermistor PT1 compositions
Electric bridge；The resistance R1 and R2 is commonly connected to Vcc, resistance R2 and thermistor PT1 and is grounded jointly；The reference voltage generates
Circuit includes operational amplifier and the anode that the resistance R5 resistance values being connected with its anode are 11K and diode D1, which puts
The anode of the cathode of big device and the resistance R6 and diode D2 that resistance value is 11K, the cathode of diode D2 connect with one end of resistance R7
It connects；The cathode of the diode D1 is grounded jointly with the other end of resistance R7；It is equipped in the reference voltage bad student circuit adjustable
Constant current voltage source Icr is in parallel, and one end is connected to the cathode of the operational amplifier, and other end connection ground can guarantee branch
Electric current is constant, minimizes the fluctuation that the curent change in compensation process generates, and stability is more preferable；The operational amplifier it is defeated
Outlet, which is connected to, to be loaded and is connected between resistance R5 and R6, is formed feedback, can preferably be ensured the stabilization of circuit output；Institute
State temperature measurement circuit resistance R1 and thermistor PT1 be commonly connected to the reference voltage generating circuit operational amplifier it is negative
Pole；The resistance R2 and R3 is commonly connected to the anode of the operational amplifier of the reference voltage generating circuit.
Principle：Temperature measurement circuit generates the variation of electric current due to the difference of temperature, this curent change is transferred to reference voltage
Generation circuit, can make up the reference voltage generating circuit be affected by temperature and the variation of electric current that generates, realize to benchmark electricity
The temperature-compensating of generation circuit, and electronic bridge measurement high sensitivity are pressed, reaction is timely to the compensation of reference voltage generating circuit soon,
The voltage output of the entire circuit of stabilization that can be as possible.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (5)
1. a kind of temperature compensated reference generative circuit, it is characterised in that：Including temperature measurement circuit and coupled benchmark
Voltage generation circuit, the temperature measurement circuit are that bridge for measuring temperature includes resistance R1, R2, R3 connected clockwise and thermistor PT1；
The resistance R1 and R2 is commonly connected to Vcc, resistance R2 and thermistor PT1 and is grounded jointly.
2. temperature compensated reference generative circuit according to claim 1, it is characterised in that：The reference voltage generates
Circuit includes the anode of operational amplifier and the resistance R5 and diode D1 that are connected with its anode, the cathode of the operational amplifier
It is connect with one end of resistance R7 with the cathode of the anode of resistance R6 and diode D2, diode D2；The cathode of the diode D1
It is grounded jointly with the other end of resistance R7.
3. temperature compensated reference generative circuit according to claim 2, it is characterised in that：The reference voltage bad student
It is in parallel that adjustable constant-flow voltage source Icr is equipped in circuit, one end is connected to the cathode of the operational amplifier, other end connection
Ground.
4. temperature compensated reference generative circuit according to claim 3, it is characterised in that：The operational amplifier
Output end, which is connected to, to be loaded and is connected between resistance R5 and R6.
5. temperature compensated reference generative circuit according to claim 4, it is characterised in that：The electricity of the temperature measurement circuit
Resistance R1 and thermistor PT1 is commonly connected to the cathode of the operational amplifier of the reference voltage generating circuit；The resistance R2
The anode of the operational amplifier of the reference voltage generating circuit is commonly connected to R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721902973.XU CN207992859U (en) | 2017-12-29 | 2017-12-29 | A kind of temperature compensated reference generative circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721902973.XU CN207992859U (en) | 2017-12-29 | 2017-12-29 | A kind of temperature compensated reference generative circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207992859U true CN207992859U (en) | 2018-10-19 |
Family
ID=63818376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721902973.XU Expired - Fee Related CN207992859U (en) | 2017-12-29 | 2017-12-29 | A kind of temperature compensated reference generative circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207992859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843598A (en) * | 2019-11-18 | 2020-02-28 | 珠海格力电器股份有限公司 | Temperature acquisition compensation method and circuit and battery management system of electric equipment |
-
2017
- 2017-12-29 CN CN201721902973.XU patent/CN207992859U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110843598A (en) * | 2019-11-18 | 2020-02-28 | 珠海格力电器股份有限公司 | Temperature acquisition compensation method and circuit and battery management system of electric equipment |
| CN110843598B (en) * | 2019-11-18 | 2021-03-02 | 珠海格力电器股份有限公司 | Temperature acquisition compensation method and circuit and battery management system of electric equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20201229 |