CN107290073A - Low-power consumption temperature-sensing system - Google Patents
Low-power consumption temperature-sensing system Download PDFInfo
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- CN107290073A CN107290073A CN201610189237.8A CN201610189237A CN107290073A CN 107290073 A CN107290073 A CN 107290073A CN 201610189237 A CN201610189237 A CN 201610189237A CN 107290073 A CN107290073 A CN 107290073A
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- 230000005611 electricity Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
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Abstract
The invention discloses a kind of low-power consumption temperature-sensing system, including low-frequency clock generator, the switch being connected with low-frequency clock generator, first current generator, second current generator, first resistor, second resistance, the analog-digital converter being connected with first resistor and second resistance and the positive negative temperature judge module being connected with the first current generator and the second current generator, low-frequency clock generator produces the enable signal and clock signal of control system work, first current generator and the second current generator are produced respectively represents the current signal of temperature to analog-digital converter and positive negative temperature judge module, analog-digital converter is by controlling the size of first resistor or second resistance to be compared to the voltage signal received and output temperature value, positive negative temperature judge module, which is compared and exported to the current signal received, represents the positive and negative level signal of temperature.Precision of the present invention is high, the linearity is good, measurement range is wide and process dependency is low.
Description
Technical field
The present invention relates to integrated circuit fields, more particularly to a kind of low-power consumption temperature-sensing system.
Background technology
In the prior art, temperature sensor occupies the market share of maximum in transducer market, and it is widely used in production and living
Every field in.Except for detection system temperature in itself in addition to, the hot-cast socket mode of temperature sensor is frequently used to measurement
Flow, radiation, gas pressure, gaseous species, humidity, thermal chemical reaction etc. are the physical quantity of medium in the form of heat, so that handle
They are converted to electric signal.And temperature sensor is also widely used for biomedical sector, Aero-Space, industry and consumption electricity
In subdomains.
Existing temperature sensor is typically the temperature characterisitic using semiconductor devices, and temperature transition is exported for voltage signal, then
The analog-digital converter of high input impedance is delivered to, so as to be converted to data signal.
Nowadays, temperature sensor is just towards high accuracy, and high reliability, Wide measuring range, high linearity, small size is inexpensive,
The integrated of low-power consumption, digitlization, intelligent development.However, often power consumption is very high for existing temperature sensor, and precision is not
It is high.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of low-power consumption temperature-sensing system so that TEMP
System has that precision is high, the linearity is good, measurement range is wide and the low feature of process dependency.
The purpose of the present invention is achieved through the following technical solutions：A kind of low-power consumption temperature-sensing system, including low-frequency clock
Generator, the switch being connected with low-frequency clock generator, with switch be connected the first current generator, with switch be connected second
Current generator, the first resistor being connected with the first current generator, the second resistance being connected with the second current generator, with the
One resistance and the connected analog-digital converter of second resistance and the positive negative temperature being connected with the first current generator and the second current generator
Judge module, the low-frequency clock generator produces the enable signal and clock signal of control system work, the first electric current production
Raw device is produced respectively with second current generator represents the current signal of temperature to the analog-digital converter and the positive negative temperature
Judge module, the analog-digital converter is by controlling the size of the first resistor or the second resistance to believe the voltage received
Number it is compared and output temperature value, the positive negative temperature judge module is compared to the current signal received and exports representative
The positive and negative level signal of temperature.
First current generator is the current generator being directly proportional to temperature, and second current generator is temperature independent
Current generator, the first resistor be adjustable resistance.
The enable signal end of the low-frequency clock generator is connected with the control end of the switch, the low-frequency clock generator when
Clock signal end is connected with the clock signal terminal of the analog-digital converter and the control end of the positive negative temperature judge module, the switch
One end and the power end of the low-frequency clock generator be connected with power supply, the other end of the switch is produced with first electric current
The input of the input of device and second current generator is connected.
The output end of first current generator and one end of the first resistor, an input of the positive negative temperature judge module
One input of end and the analog-digital converter is connected, the output end of second current generator and one end of the second resistance,
Another input of the positive negative temperature judge module and another input of the analog-digital converter are connected, the analog-digital converter
Collection complete end be connected with the feedback signal terminal of the low-frequency clock generator, the other end of the first resistor and described second
The other end ground connection of resistance, the output end of the analog-digital converter is connected with the control end of the first resistor, and output temperature value；
The output end output of the positive negative temperature judge module represents the positive and negative level signal of temperature.
First current generator is the current generator being directly proportional to temperature, and second current generator is temperature independent
Current generator, the second resistance is adjustable resistance, the control of the output end of the analog-digital converter and the second resistance
End is connected.
First current generator is the current generator being directly proportional to temperature, and second current generator is temperature independent
Adjustable current generator, the output end of the analog-digital converter is connected with the control end of second current generator.
First current generator is the adjustable current generator being directly proportional to temperature, and second current generator is and temperature
Unrelated current generator, the output end of the analog-digital converter is connected with the control end of first current generator.
The beneficial effects of the invention are as follows：Precision is high, the linearity is good, measurement range is wide and process dependency is low.
Brief description of the drawings
Fig. 1 is the structure chart of low-power consumption temperature-sensing system of the present invention；
Fig. 2 to Fig. 4 is the structure chart of low-power consumption temperature-sensing system other embodiment of the present invention.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
State.
As shown in figure 1, Fig. 1 be low-power consumption temperature-sensing system of the present invention structure chart, it include low-frequency clock generator, and
The connected switch T of low-frequency clock generator, the second electric current of the first current generator and switch T-phase even with switch T-phase even
Generator, the first resistor R1 being connected with the first current generator, the second resistance R2 being connected with the second current generator, with
Connected first resistor R1 and second resistance R2 analog-digital converter and it is connected with the first current generator and the second current generator
Positive negative temperature judge module.Low-frequency clock generator is used for the enable signal and clock signal for producing control system work, the first electricity
Flow generator and the second current generator are produced respectively to be represented current signal to the analog-digital converter and positive negative temperature of temperature and judges mould
Block, analog-digital converter is by controlling first resistor R1 or second resistance R2 size to be compared simultaneously the voltage signal received
Output temperature value, positive negative temperature judge module, which is compared and exported to the current signal received, represents the positive and negative level letter of temperature
Number.
In the present embodiment, the first current generator is the current generator that is directly proportional to temperature, the second current generator be with
The unrelated current generator of temperature, first resistor R1 is adjustable resistance.
Wherein, the enable signal end of low-frequency clock generator is connected with switching T control end, the clock letter of low-frequency clock generator
Number end is connected with the clock signal terminal of analog-digital converter and the control end of positive negative temperature judge module, when switching T one end and low frequency
The power end of clock generator is connected with power supply, and the other end and the input of the first current generator and the second electric current for switching T are produced
The input of device is connected, the output end of the first current generator and first resistor R1 one end, the one of positive negative temperature judge module
One input of input and analog-digital converter is connected, the output end of the second current generator and second resistance R2 one end, just
Another input of negative temperature judge module and another input of analog-digital converter are connected, the collection of analog-digital converter complete end with
The feedback signal terminal of low-frequency clock generator is connected, and the first resistor R1 other end is grounded with the second resistance R2 other end, mould
The output end of number converter is connected with first resistor R1 control end, and output temperature value；The output of positive negative temperature judge module
End output represents the positive and negative level signal of temperature.
The operation principle of low-power consumption temperature-sensing system of the present invention is as described below：
Low-frequency clock generator carries out timing, when reaching the time, produces and enables signal and clock signal so that switch T conductings,
Temperature-sensing system is started working, and the first current generator and the second current generator produce the current signal for representing temperature respectively,
After positive negative temperature judge module is compared to two current signals, generation represents the positive and negative level signal of temperature；Analog-digital converter
By adjusting first resistor R1 size, the voltage signal received is compared, and output temperature value.
After the completion of analog-digital converter collection, feedback signal tremendously low frequency clock generator can be sent so that low-frequency clock generator is cut
It is disconnected to enable signal and clock signal, into working condition next time.
Fig. 2 is the structure chart of another embodiment of low-power consumption temperature sensor of the present invention, in this embodiment, the production of the first electric current
Raw device is the current generator being directly proportional to temperature, and the second current generator is temperature independent current generator, second resistance
R2 is adjustable resistance, and the output end of analog-digital converter is connected with second resistance R2 control end, and by adjusting second resistance R2
Size, the voltage signal received is compared, output temperature value.
Fig. 3 is the structure chart of the embodiment of low-power consumption temperature sensor the 3rd of the present invention, in this embodiment, the production of the first electric current
Raw device is the current generator being directly proportional to temperature, and the second current generator is temperature independent adjustable current generator, modulus
The output end of converter is connected with the control end of the second current generator, and big by the electric current for adjusting the generation of the second current generator
It is small, the voltage signal received is compared, output temperature value.
Fig. 4 is the structure chart of the embodiment of low-power consumption temperature sensor the 4th of the present invention, in this embodiment, the production of the first electric current
Raw device is the adjustable current generator being directly proportional to temperature, and the second current generator is temperature independent current generator, modulus
The output end of converter is connected with the control end of the first current generator, and big by the electric current for adjusting the generation of the first current generator
It is small, the voltage signal received is compared, output temperature value.
As can be seen from the above analysis, the first current generator and the second current generator produce one and are directly proportional to temperature respectively
Electric current and a temperature independent electric current, and the two electric currents have correlation, and pass through first resistor R1 and second resistance
R2 generates the voltage being directly proportional to temperature and a temperature independent voltage respectively, and the two voltages can pass through modulus
The output end of converter is adjusted, therefore the two voltage differences and process deviation very little, and the linearity is good, and precision is higher.
And when temperature-sensing system is stopped, the power consumption of generation is very low, only when temperature-sensing system works, one could be produced
Fixed power consumption.
In summary, low-power consumption temperature-sensing system of the present invention has that precision is high, the linearity is good, measurement range is wide and technique is relied on
The low feature of property.
Claims (7)
1. a kind of low-power consumption temperature-sensing system, it is characterised in that：The low-power consumption temperature-sensing system is produced including low-frequency clock
Device, the switch being connected with low-frequency clock generator, the first current generator being connected with switch, the second electric current being connected with switch
Generator, the first resistor being connected with the first current generator, the second resistance being connected with the second current generator and the first electricity
Resistance and the connected analog-digital converter of second resistance and the positive negative temperature being connected with the first current generator and the second current generator judge
Module, the low-frequency clock generator produces the enable signal and clock signal of control system work, first current generator
Produced respectively with second current generator and represent the current signal of temperature to the analog-digital converter and the positive negative temperature and judge
Module, the analog-digital converter is by controlling the size of the first resistor or the second resistance to enter the voltage signal received
Row compares and output temperature value, and the positive negative temperature judge module, which is compared and exported to the current signal received, represents temperature
Positive and negative level signal.
2. low-power consumption temperature-sensing system according to claim 1, it is characterised in that：First current generator be with
The current generator that temperature is directly proportional, second current generator is temperature independent current generator, the first resistor
For adjustable resistance.
3. low-power consumption temperature-sensing system according to claim 2, it is characterised in that：The low-frequency clock generator makes
Energy signal end is connected with the control end of the switch, clock signal terminal and the analog-digital converter of the low-frequency clock generator
The control end of clock signal terminal and the positive negative temperature judge module is connected, one end of the switch and the low-frequency clock generator
Power end be connected with power supply, the input and second electric current of the other end of the switch and first current generator are produced
The input of raw device is connected.
4. low-power consumption temperature-sensing system according to claim 3, it is characterised in that：First current generator it is defeated
Go out one end, an input of the input and the analog-digital converter of the positive negative temperature judge module for end and the first resistor
End is connected, the output end of second current generator and one end of the second resistance, the positive negative temperature judge module it is another
Another input of one input and the analog-digital converter is connected, when the collection of the analog-digital converter completes end with the low frequency
The feedback signal terminal of clock generator is connected, and the other end of the first resistor and the other end of the second resistance are grounded, the mould
The output end of number converter is connected with the control end of the first resistor, and output temperature value；The positive negative temperature judge module
Output end output represents the positive and negative level signal of temperature.
5. low-power consumption temperature-sensing system according to claim 1, it is characterised in that：First current generator be with
The current generator that temperature is directly proportional, second current generator is temperature independent current generator, the second resistance
For adjustable resistance, the output end of the analog-digital converter is connected with the control end of the second resistance.
6. low-power consumption temperature-sensing system according to claim 1, it is characterised in that：First current generator be with
The current generator that temperature is directly proportional, second current generator is temperature independent adjustable current generator, the modulus
The output end of converter is connected with the control end of second current generator.
7. low-power consumption temperature-sensing system according to claim 1, it is characterised in that：First current generator be with
The adjustable current generator that temperature is directly proportional, second current generator is temperature independent current generator, the modulus
The output end of converter is connected with the control end of first current generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189237.8A CN107290073A (en) | 2016-03-30 | 2016-03-30 | Low-power consumption temperature-sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610189237.8A CN107290073A (en) | 2016-03-30 | 2016-03-30 | Low-power consumption temperature-sensing system |
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| Publication Number | Publication Date |
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| CN107290073A true CN107290073A (en) | 2017-10-24 |
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| CN201610189237.8A Pending CN107290073A (en) | 2016-03-30 | 2016-03-30 | Low-power consumption temperature-sensing system |
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|---|---|---|---|---|
| TW586000B (en) * | 2002-07-25 | 2004-05-01 | Richtek Technology Corp | Temperature detection circuit and method |
| TW200726965A (en) * | 2006-01-13 | 2007-07-16 | Univ Nat Taiwan Science Tech | Digital temperature sensing system |
| CN101019010A (en) * | 2004-09-15 | 2007-08-15 | 皇家飞利浦电子股份有限公司 | Digital temperature sensors and calibration thereof |
| US7372317B1 (en) * | 2005-11-21 | 2008-05-13 | Analog Devices, Inc. | PTATn bias cell for improved temperature performance |
| US20080144415A1 (en) * | 2006-12-14 | 2008-06-19 | Micron Technology, Inc. | On-chip temperature sensor |
| CN101639384A (en) * | 2009-09-09 | 2010-02-03 | 凌阳科技股份有限公司 | Device and method for sensing temperature |
| US7724068B1 (en) * | 2008-12-03 | 2010-05-25 | Micrel, Incorporated | Bandgap-referenced thermal sensor |
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| CN104390715A (en) * | 2014-10-15 | 2015-03-04 | 南通大学 | Temperature conversion method and a low-power high-precision integrated temperature sensor |
| CN104807551A (en) * | 2014-01-29 | 2015-07-29 | 北京福星晓程电子科技股份有限公司 | Temperature sensor applied to metering ammeter and temperature trimming method thereof |
| CN205483302U (en) * | 2016-03-30 | 2016-08-17 | 成都锐成芯微科技有限责任公司 | Low -power consumption temperature sensing system |
-
2016
- 2016-03-30 CN CN201610189237.8A patent/CN107290073A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW586000B (en) * | 2002-07-25 | 2004-05-01 | Richtek Technology Corp | Temperature detection circuit and method |
| CN101019010A (en) * | 2004-09-15 | 2007-08-15 | 皇家飞利浦电子股份有限公司 | Digital temperature sensors and calibration thereof |
| US7372317B1 (en) * | 2005-11-21 | 2008-05-13 | Analog Devices, Inc. | PTATn bias cell for improved temperature performance |
| TW200726965A (en) * | 2006-01-13 | 2007-07-16 | Univ Nat Taiwan Science Tech | Digital temperature sensing system |
| US20080144415A1 (en) * | 2006-12-14 | 2008-06-19 | Micron Technology, Inc. | On-chip temperature sensor |
| US7724068B1 (en) * | 2008-12-03 | 2010-05-25 | Micrel, Incorporated | Bandgap-referenced thermal sensor |
| CN101769799A (en) * | 2008-12-30 | 2010-07-07 | 东部高科股份有限公司 | Temperature measuring device |
| CN101639384A (en) * | 2009-09-09 | 2010-02-03 | 凌阳科技股份有限公司 | Device and method for sensing temperature |
| CN104807551A (en) * | 2014-01-29 | 2015-07-29 | 北京福星晓程电子科技股份有限公司 | Temperature sensor applied to metering ammeter and temperature trimming method thereof |
| CN104390715A (en) * | 2014-10-15 | 2015-03-04 | 南通大学 | Temperature conversion method and a low-power high-precision integrated temperature sensor |
| CN205483302U (en) * | 2016-03-30 | 2016-08-17 | 成都锐成芯微科技有限责任公司 | Low -power consumption temperature sensing system |
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Application publication date: 20171024 |