CN205483302U - Low -power consumption temperature sensing system - Google Patents
Low -power consumption temperature sensing system Download PDFInfo
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- CN205483302U CN205483302U CN201620254898.XU CN201620254898U CN205483302U CN 205483302 U CN205483302 U CN 205483302U CN 201620254898 U CN201620254898 U CN 201620254898U CN 205483302 U CN205483302 U CN 205483302U
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- current generator
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Abstract
The utility model discloses a low -power consumption temperature sensing system, including the low -frequency clock generator, the switch that links to each other with the low -frequency clock generator, first electric current generator, second electric current generator, first resistance, the vehicle charging control system further comprises a second resistor, adc who links to each other with first resistance and second resistance and the positive negative temperature judge module that links to each other with first electric current generator and second electric current generator, the low -frequency clock generator produces the enable signal and the clock signal of control system work, first electric current generator produces current signal to adc and the positive negative temperature judge module of representing the temperature respectively with second electric current generator, adc carries out the comparison and exports the temperature value received voltage signal through the size of controlling first resistance or second resistance, positive negative temperature judge module carries out the comparison to the received current signal and the positive and negative level signal of temperature is represented in output. The utility model discloses the precision is high, the linearity is good, measuring range is wide and the technology dependence is low.
Description
Technical field
This utility model relates to integrated circuit fields, particularly relates 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 productive life
Every field in.In addition to for detection system temperature itself, the hot-cast socket mode of temperature sensor is frequently used to measure
Flow, radiation, gas pressure, gaseous species, humidity, thermal chemical reaction etc. are the physical quantity of medium in the form of heat, thus handle
They are converted to the signal of telecommunication.And temperature sensor is also widely used for biomedical sector, Aero-Space, industry and consumption electricity
In sub-field.
Existing temperature sensor is typically to utilize the temperature characterisitic of semiconductor device, is voltage signal output by temperature transition, then
Deliver to the analog-digital converter of high input impedance, thus be converted to digital signal.
Nowadays, temperature sensor just towards high accuracy, high reliability, Wide measuring range, high linearity, small size, low cost,
Integrated, digitized, the intelligent development of low-power consumption.But, existing temperature sensor often power consumption is the highest, and precision is not
High.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of low-power consumption temperature-sensing system so that temperature
The features such as sensor-based system has that precision is high, the linearity is good, measure wide ranges and process dependency is low.
The purpose of this utility model is achieved through the following technical solutions: a kind of low-power consumption temperature-sensing system, including low frequency
Clock generator, the switch that is connected with low-frequency clock generator, the first current generator being connected with switch, it is connected with switching
Second current generator, the first resistance being connected with the first current generator, the second resistance being connected with the second current generator,
The analog-digital converter that is connected with the first resistance and the second resistance and positive and negative with what the first current generator and the second current generator were connected
Temperature judge module, described low-frequency clock generator produces enable signal and the clock signal of control system work, described first electricity
Flow generator and described second current generator produce respectively and represent the current signal of temperature to described analog-digital converter and described positive and negative
Temperature judge module, described analog-digital converter is by controlling the size of described first resistance or the described second resistance electricity to receiving
Pressure signal compares and output temperature value, and the current signal received is compared and exports by described positive negative temperature judge module
Represent the level signal that temperature is positive and negative.
Described first current generator is the current generator being directly proportional to temperature, and described second current generator is temperature independent
Current generator, described first resistance is adjustable resistance.
Described low-frequency clock generator enable signal end be connected with the control end of described switch, described low-frequency clock generator time
Clock signal end is connected with the control end of the clock signal terminal of described analog-digital converter and described positive negative temperature judge module, described switch
One end and the power end of described low-frequency clock generator be connected with power supply, the other end of described switch produces with described first electric current
The input of device and the input of described second current generator are connected.
The outfan of described first current generator and one end of described first resistance, an input of described positive negative temperature judge module
One input of end and described analog-digital converter is connected, one end of the outfan of described second current generator and described second resistance,
Another input of described positive negative temperature judge module and another input of described analog-digital converter are connected, described analog-digital converter
Collection complete end be connected with the feedback signal terminal of described low-frequency clock generator, the other end of described first resistance and described second
The other end ground connection of resistance, the outfan of described analog-digital converter is connected with the control end of described first resistance, and output temperature value；
The outfan output of described positive negative temperature judge module represents the level signal that temperature is positive and negative.
Described first current generator is the current generator being directly proportional to temperature, and described second current generator is temperature independent
Current generator, described second resistance is adjustable resistance, the control of the outfan of described analog-digital converter and described second resistance
End is connected.
Described first current generator is the current generator being directly proportional to temperature, and described second current generator is temperature independent
Adjustable current generator, the outfan of described analog-digital converter is connected with the control end of described second current generator.
Described first current generator is the adjustable current generator being directly proportional to temperature, and described second current generator is and temperature
Unrelated current generator, the outfan of described analog-digital converter is connected with the control end of described first current generator.
The beneficial effects of the utility model are: precision is high, the linearity is good, measure wide ranges and process dependency is low.
Accompanying drawing explanation
Fig. 1 is the structure chart of this utility model low-power consumption temperature-sensing system；
Fig. 2 to Fig. 4 is the structure chart of this utility model low-power consumption other embodiments of temperature-sensing system.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model does not limits to
In the following stated.
As it is shown in figure 1, the structure chart that Fig. 1 is this utility model low-power consumption temperature-sensing system, it include low-frequency clock generator,
The switch T that is connected with low-frequency clock generator and switch T-phase the first current generator even and switch T-phase the second electricity even
Flow generator, the first resistance R1 being connected with the first current generator, the second resistance R2 being connected with the second current generator,
The analog-digital converter that is connected with the first resistance R1 and the second resistance R2 and being connected with the first current generator and the second current generator
Positive negative temperature judge module.Low-frequency clock generator for produce control system work enable signal and clock signal, first
Current generator and the second current generator produce the current signal representing temperature respectively and judge mould to analog-digital converter and positive negative temperature
Block, the voltage signal received is compared also by analog-digital converter by the size controlling the first resistance R1 or the second resistance R2
Output temperature value, the current signal received is compared and exports and represents the level letter that temperature is positive and negative by positive negative temperature judge module
Number.
In the present embodiment, the first current generator is the current generator being directly proportional to temperature, the second current generator be with
The current generator that temperature is unrelated, the first resistance R1 is adjustable resistance.
Wherein, the signal end that enables of low-frequency clock generator is connected with the control end of switch T, the clock letter of low-frequency clock generator
Number end is connected with the control end of the clock signal terminal of analog-digital converter and positive negative temperature judge module, when switching one end and the low frequency of T
The power end of clock generator is connected with power supply, and the other end of switch T and the input of the first current generator and the second electric current produce
The input of device is connected, the outfan of the first current generator and one end of the first resistance R1, the one of positive negative temperature judge module
One input of input and analog-digital converter is connected, the outfan of the second current generator and one end of the second resistance R2, 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, the other end of the first resistance R1 and the other end ground connection of the second resistance R2, mould
The outfan of number converter and the control end of the first resistance R1 are connected, and output temperature value；The output of positive negative temperature judge module
End output represents the level signal that temperature is positive and negative.
The operation principle of this utility model low-power consumption temperature-sensing system is as described below:
Low-frequency clock generator carries out timing, when the time arrives, produces and enables signal and clock signal so that switch T conducting,
Temperature-sensing system is started working, and the first current generator and the second current generator produce the current signal representing temperature respectively,
After two current signals are compared by positive negative temperature judge module, produce and represent the level signal that temperature is positive and negative；Analog-digital converter
By adjusting the size of the first resistance R1, the voltage signal received is compared, and output temperature value.
After analog-digital converter collection completes, feedback signal tremendously low frequency clock generator can be sent so that low-frequency clock generator is cut
Disconnected signal and the clock signal of enabling, entrance duty next time.
Fig. 2 is the structure chart of this utility model low-power consumption another embodiment of temperature sensor, in this embodiment, and the first electricity
Flow generator 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 outfan of analog-digital converter and the control end of the second resistance R2 are connected, and by adjusting the second electricity
The size of resistance R2, compares the voltage signal received, output temperature value.
Fig. 3 is the structure chart of this utility model low-power consumption temperature sensor the 3rd embodiment, in this embodiment, and the first electricity
Flow generator is the current generator being directly proportional to temperature, and the second current generator is temperature independent adjustable current generator,
The outfan of analog-digital converter and the control end of the second current generator are connected, and by adjusting the electricity that the second current generator produces
Stream size, compares the voltage signal received, output temperature value.
Fig. 4 is the structure chart of this utility model low-power consumption temperature sensor the 4th embodiment, in this embodiment, and the first electricity
Flow generator is the adjustable current generator being directly proportional to temperature, and the second current generator is temperature independent current generator,
The outfan of analog-digital converter and the control end of the first current generator are connected, and by adjusting the electricity that the first current generator produces
Stream size, compares the voltage signal received, output temperature value.
As can be seen from the above analysis, the first current generator and the second current generator produce one respectively and are directly proportional to temperature
Electric current and a temperature independent electric current, and the two electric current has a dependency, and by the first resistance R1 and the second resistance
R2 creates the voltage being directly proportional to temperature and a temperature independent voltage respectively, and the two voltage can pass through modulus
The outfan of transducer is adjusted, and therefore the two voltage difference is the least with process deviation, and the linearity is good, and precision is higher.
And when temperature-sensing system quits work, the power consumption of generation is the lowest, only when temperature-sensing system works, one could be produced
Fixed power consumption.
In sum, this utility model low-power consumption temperature-sensing system has precision height, the linearity is good, measure wide ranges and technique
The features such as dependency is low.
Claims (7)
1. a low-power consumption temperature-sensing system, it is characterised in that: described low-power consumption temperature-sensing system includes that low-frequency clock produces
Device, the switch being connected with low-frequency clock generator, the first current generator being connected with switch, with switch the second electric current of being connected
Generator, the first resistance being connected with the first current generator, the second resistance being connected with the second current generator and the first electricity
Resistance and the second resistance be connected analog-digital converter and be connected with the first current generator and the second current generator positive negative temperature judgement
Module, described low-frequency clock generator produces enable signal and clock signal, described first current generator of control system work
Produce the current signal representing temperature respectively to judge to described analog-digital converter and described positive negative temperature with described second current generator
Module, the voltage signal received is entered by described analog-digital converter by the size controlling described first resistance or described second resistance
Row compares and output temperature value, and the current signal received is compared and exports and represents temperature by described positive negative temperature judge module
Positive and negative level signal.
Low-power consumption temperature-sensing system the most according to claim 1, it is characterised in that: described first current generator be with
The current generator that temperature is directly proportional, described second current generator is temperature independent current generator, described first resistance
For adjustable resistance.
Low-power consumption temperature-sensing system the most according to claim 2, it is characterised in that: making of described low-frequency clock generator
Can be connected with the control end of described switch by signal end, the clock signal terminal of described low-frequency clock generator and described analog-digital converter
The control end of clock signal terminal and described positive negative temperature judge module is connected, one end of described switch and described low-frequency clock generator
Power end be connected with power supply, input and described second electric current of the other end of described switch and described first current generator produce
The input of raw device is connected.
Low-power consumption temperature-sensing system the most according to claim 3, it is characterised in that: described first current generator defeated
Go out end and one end of described first resistance, an input of described positive negative temperature judge module and an input of described analog-digital converter
End is connected, the outfan of described second current generator and one end of described second resistance, described positive negative temperature judge module another
Another input of one input and described analog-digital converter is connected, when the collection of described analog-digital converter completes end with described low frequency
The feedback signal terminal of clock generator is connected, the other end of described first resistance and the other end ground connection of described second resistance, described mould
The outfan of number converter is connected with the control end of described first resistance, and output temperature value；Described positive negative temperature judge module
Outfan output represents the level signal that temperature is positive and negative.
Low-power consumption temperature-sensing system the most according to claim 1, it is characterised in that: described first current generator be with
The current generator that temperature is directly proportional, described second current generator is temperature independent current generator, described second resistance
For adjustable resistance, the outfan of described analog-digital converter is connected with the control end of described second resistance.
Low-power consumption temperature-sensing system the most according to claim 1, it is characterised in that: described first current generator be with
The current generator that temperature is directly proportional, described second current generator is temperature independent adjustable current generator, described modulus
The outfan of transducer is connected with the control end of described second current generator.
Low-power consumption temperature-sensing system the most according to claim 1, it is characterised in that: described first current generator be with
The adjustable current generator that temperature is directly proportional, described second current generator is temperature independent current generator, described modulus
The outfan of transducer is connected with the control end of described first current generator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620254898.XU CN205483302U (en) | 2016-03-30 | 2016-03-30 | Low -power consumption temperature sensing system |
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| CN201620254898.XU CN205483302U (en) | 2016-03-30 | 2016-03-30 | Low -power consumption temperature sensing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290073A (en) * | 2016-03-30 | 2017-10-24 | 成都锐成芯微科技股份有限公司 | Low-power consumption temperature-sensing system |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290073A (en) * | 2016-03-30 | 2017-10-24 | 成都锐成芯微科技股份有限公司 | Low-power consumption temperature-sensing system |
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