CN1417566A - Temperature compensation circuit - Google Patents
Temperature compensation circuit Download PDFInfo
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- CN1417566A CN1417566A CN 01134621 CN01134621A CN1417566A CN 1417566 A CN1417566 A CN 1417566A CN 01134621 CN01134621 CN 01134621 CN 01134621 A CN01134621 A CN 01134621A CN 1417566 A CN1417566 A CN 1417566A
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- potentiometer
- compensation
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- temperature compensation
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- Measuring Magnetic Variables (AREA)
Abstract
The temperature compensation circuit has transistor and thermal sensitive resistor as compensation device and performs temperature compensation of the next stage via following amplifier. The diode has high stability and high precision and wide thermal sensitive range, and may be used in obtained different compensation via regulating resistance. The following amplifier can be used in regulating based on required precision or required compensation range. The present invention can be used in detection and control requiring automatic compensation.
Description
The present invention relates to a kind of temperature-compensation circuit, particularly poor to some Sensitive Apparatus temperature characterisitic, temperature coefficient is big, and requires the higher relatively field of output accuracy.
Two kinds of methods of general in the past main employing are as temperature compensation.A kind of employing thermistor is as temperature compensation, because the thermistor precision is not high, so compensation effect is undesirable, but the thermistor temp coefficient is big, and adjustable extent is bigger.The another kind of voltage stabilizing diode that adopts constitutes the temperature compensation circuit.Because diode precision height, compensation effect is better relatively, but voltage stabilizing diode is when Vz＜5.7V, and zener effect is preponderated, and temperature coefficient is a negative value; Otherwise avalanche effect is preponderated, and temperature coefficient is for just.Low pressure stabilivolt voltage regulation performance is relatively poor, and the too high restriction that is subjected to certain circuit needs of voltage stabilizing value.And Vz is between 6～8V the time, and so temperature coefficient is little can range of adjustment smaller again.
The object of the invention is to avoid existing technical deficiency part, and is big and accuracy requirement is high relatively at requiring compensation range, effectively solves the temperature stability problem, can make temperature effect reduce several magnitude.
Compensating device of the present invention adopts voltage stabilizing diode, and thermistor and follower amplifier constitute the temperature compensation circuit together.Purpose of the present invention can reach by following measure:
Concrete method of attachment of the present invention is as follows: thermistor RT is in parallel with potentiometer WR, and the adjustable end of potentiometer WR links with an end in parallel.This end in parallel with the adjustable end of potentiometer WR and the end of potentiometer WT link, and the other end of potentiometer WT and voltage stabilizing diode negative terminal link.Adjustable end of potentiometer WT and resistance R one end link, and the other end of resistance R and potentiometer WV one end join, and the adjustable end of potentiometer WV and amplifier A anode link, and amplifier A negative terminal and output terminal link.
Fig. 1 is an electrical schematic diagram of the present invention:
Fig. 2 is an another kind of electrical schematic diagram of the present invention:
Fig. 1 is positive temperature compensation of the present invention, and the present invention compensates having the big circuit of negative temperature coefficient tool temperature coefficient.
Fig. 2 repays for negative temperature of the present invention is real.The present invention has the big circuit of temperature coefficient and compensates having positive temperature coefficient (PTC).
The difference of Fig. 1 and Fig. 2 is that the connection of power supply is different.Positive supply links to each other with thermistor among Fig. 1, and stabilivolt links to each other with ground.Positive supply links to each other with stabilivolt among Fig. 2, and thermistor links to each other with ground.
The present invention below will specifically demonstrate its compensation principle.
Hall device is a kind of magnetosensitive device, is mainly used in detection, control and measurement, and purposes is very extensive.But this device temperature characteristic is poor, and temperature coefficient is big, makes that further promoting its application has been subjected to very big restriction.Generally adopted thermistor as temperature compensation in the past, but, compensated undesirable because the thermistor precision is not high.The voltage stabilizing diode of employing is also arranged as temperature compensation, the relative accuracy height, but compensation range is little, and used number increases, and the situation of undercompensation is often arranged.
Hall device is in magnetic field B, wherein presses the Hall voltage of output terminal to be
E
H＝KIB?Cosα (1)
When the direction of magnetic field B was consistent with the hall device plane normal, output potential was
E
H＝KIB (2)
Wherein K is a hall sensitivity, and I is a steady current.In operating temperature range, K is the function of temperature T, can be expressed as: K=K (0) (1-β
HT) (3) β H is the temperature coefficient of hall device, and it is positive and negative in used material decision.Get by (2) (3)
E
H=K (0) IB (1-β
HT) to reduce temperature as far as possible to E
HInfluence can design Control current I, make I (T)=I (1+ β
HT) E then
H=K (0) IB (1-β
HT) (1+ β
HT)
When temperature variations, make E like this
HSubstantially constant.Physical circuit connects as Fig. 3:
Thereby regulate to select working current I by WV, can adjust the scope of offset as required, by WT scalable compensation rate accurately by WR.
The present invention particularly carries out temperature compensation at the big Sensitive Apparatus of a plurality of temperatures coefficient.
The present invention is characteristics compared to existing technology:
1. it is big but precision is not high to have solved compensation range in the past, and perhaps enough the but little shortcoming of temperature range of compensation precision combines both methods of compensation, and compensation can accurately be regulated according to concrete temperature coefficient.
2. circuit can detect being applied to simply, accurately and reliably, and the big sensitive element of temperature drift carries out temperature compensation in control and the fields of measurement.
Claims (2)
1. temperature-compensation circuit is characterized in that: compensating device adopts Zener diode, and heat energy resistance and follower amplifier constitute the temperature compensation circuit together.
2. it is characterized in that: thermistor RT is in parallel with potentiometer WR, and the adjustable end of potentiometer WR links with an end in parallel.This end in parallel with the adjustable end of potentiometer WR and the end of potentiometer WT link, and the other end of potentiometer WT and voltage stabilizing diode negative terminal link.Adjustable end of potentiometer WT and resistance R one end link, and the other end of resistance R and potentiometer WV one end join, and the adjustable end of potentiometer WV and amplifier A anode link, and amplifier A negative terminal and output terminal link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134621 CN1417566A (en) | 2001-11-07 | 2001-11-07 | Temperature compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134621 CN1417566A (en) | 2001-11-07 | 2001-11-07 | Temperature compensation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1417566A true CN1417566A (en) | 2003-05-14 |
Family
ID=4672619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01134621 Pending CN1417566A (en) | 2001-11-07 | 2001-11-07 | Temperature compensation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1417566A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005112256A1 (en) * | 2004-05-18 | 2005-11-24 | Yuejun Yan | Temerature compensation attenuator |
| CN101750164B (en) * | 2009-09-08 | 2013-04-24 | 杭州勇华车业有限公司 | Temperature compensation detection circuit of electromobile battery charger |
| CN103312273A (en) * | 2013-06-06 | 2013-09-18 | 三维通信股份有限公司 | Circuit device for inhibiting temperature effect of LDMOS (laterally diffused metal oxide semiconductor) power amplifier |
| CN104819784A (en) * | 2015-04-29 | 2015-08-05 | 迈尔世通电气（苏州）股份有限公司 | Monitoring system used for power cable in motor system |
| CN105466460A (en) * | 2015-12-18 | 2016-04-06 | 深圳市贝沃德克生物技术研究院有限公司 | Circuit temperature drift compensation system and method of biosensor |
| CN108933517A (en) * | 2018-09-06 | 2018-12-04 | 广州金升阳科技有限公司 | The output voltage feed circuit and temperature-compensation circuit of switch converters |
| CN109287049A (en) * | 2018-10-16 | 2019-01-29 | 中国航发南方工业有限公司 | Formation light temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
| CN109310291A (en) * | 2016-06-10 | 2019-02-05 | 奥林巴斯株式会社 | Endoscope and endoscope apparatus |
| CN109520527A (en) * | 2019-01-24 | 2019-03-26 | 成都新欣神风电子科技有限公司 | A kind of Hall sensor with temperature compensation function |
-
2001
- 2001-11-07 CN CN 01134621 patent/CN1417566A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005112256A1 (en) * | 2004-05-18 | 2005-11-24 | Yuejun Yan | Temerature compensation attenuator |
| CN101750164B (en) * | 2009-09-08 | 2013-04-24 | 杭州勇华车业有限公司 | Temperature compensation detection circuit of electromobile battery charger |
| CN103312273A (en) * | 2013-06-06 | 2013-09-18 | 三维通信股份有限公司 | Circuit device for inhibiting temperature effect of LDMOS (laterally diffused metal oxide semiconductor) power amplifier |
| CN103312273B (en) * | 2013-06-06 | 2016-12-28 | 三维通信股份有限公司 | A kind of circuit arrangement of LDMOS power amplifier temperature effect suppression |
| CN104819784A (en) * | 2015-04-29 | 2015-08-05 | 迈尔世通电气（苏州）股份有限公司 | Monitoring system used for power cable in motor system |
| CN105466460B (en) * | 2015-12-18 | 2019-08-30 | 深圳市贝沃德克生物技术研究院有限公司 | The circuit temperature drift compensating system and method for biosensor |
| CN105466460A (en) * | 2015-12-18 | 2016-04-06 | 深圳市贝沃德克生物技术研究院有限公司 | Circuit temperature drift compensation system and method of biosensor |
| CN109310291B (en) * | 2016-06-10 | 2021-06-15 | 奥林巴斯株式会社 | Endoscope and endoscope device |
| CN109310291A (en) * | 2016-06-10 | 2019-02-05 | 奥林巴斯株式会社 | Endoscope and endoscope apparatus |
| CN108933517A (en) * | 2018-09-06 | 2018-12-04 | 广州金升阳科技有限公司 | The output voltage feed circuit and temperature-compensation circuit of switch converters |
| CN109287049B (en) * | 2018-10-16 | 2019-12-27 | 中国航发南方工业有限公司 | Formation lamp temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
| CN109287049A (en) * | 2018-10-16 | 2019-01-29 | 中国航发南方工业有限公司 | Formation light temperature drift compensation circuit, formation lamp control circuit and formation lamp control device |
| CN109520527A (en) * | 2019-01-24 | 2019-03-26 | 成都新欣神风电子科技有限公司 | A kind of Hall sensor with temperature compensation function |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |