CN211425716U - Temperature sensor assembly - Google Patents

Temperature sensor assembly Download PDF

Info

Publication number
CN211425716U
CN211425716U CN202020235957.5U CN202020235957U CN211425716U CN 211425716 U CN211425716 U CN 211425716U CN 202020235957 U CN202020235957 U CN 202020235957U CN 211425716 U CN211425716 U CN 211425716U
Authority
CN
China
Prior art keywords
temperature sensor
temperature
current
voltage
sensor assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020235957.5U
Other languages
Chinese (zh)
Inventor
童成盛
盛云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Novosense Microelectronics Co ltd
Original Assignee
Suzhou Novosense Microelectronics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Novosense Microelectronics Co ltd filed Critical Suzhou Novosense Microelectronics Co ltd
Priority to CN202020235957.5U priority Critical patent/CN211425716U/en
Application granted granted Critical
Publication of CN211425716U publication Critical patent/CN211425716U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measurement Of Current Or Voltage (AREA)

Abstract

The utility model provides a temperature sensor assembly, include: a first current module for generating a first current I having a negative correlation with temperature1(ii) a A second current module for generating a second current I positively correlated with the temperature2(ii) a Feedback resistor Rf(ii) a The positive input end of the amplifier is connected with the first current module and the second current module, and the positive input end and the output end of the amplifier are connected through a feedback resistor RfConnected, the output end of the amplifier outputs a total output voltage VOUT. A first current I1And a second current I2The sum is reversedFeed resistor RfAmplified and converted into a total output voltage VOUTAnd then outputting. So that the total output voltage VOUTValue of (D) and a first current I1A second current I2And a feedback resistor RfIs correlated. Thereby adjusting the feedback resistance RfTo adjust the zero point temperature voltage V of the entire temperature sensor assemblyDCAnd a slope Gain to realize an arbitrary slope Gain and a zero point temperature voltage VDCThe analog output sensor of (1).

Description

Temperature sensor assembly
Technical Field
The utility model belongs to the technical field of the temperature sensor and specifically relates to CMOS temperature sensor chip field.
Background
In the prior art, the voltage V of a triode in a CMOS semiconductor process is generally utilizedBEThe characteristic of decreasing with the increase of temperature is obtained, thereby obtaining the output voltage V changing with the temperatureOUTThen the output voltage V is adjustedOUTAnd converting the temperature into temperature to obtain a temperature value, thereby realizing the function of the temperature sensor.
However, in the prior art, the output voltage VOUTVoltage V only with triodeBEIn addition, the slope and the zero voltage of the sensor are relatively fixed, and the flexibility is not enough. And, the voltage V of the triodeBEThe temperature sensor has great nonlinearity with temperature change, so that the accuracy of the temperature sensor is not high.
Therefore, in order to solve the above problems, it is necessary to design a temperature sensor assembly having adjustable slope and zero voltage and high accuracy.
SUMMERY OF THE UTILITY MODEL
In order to solve one of the above problems, the utility model provides a temperature sensor assembly, include:
a first current module for generating a first current I having a negative correlation with temperature1；
A second current module for generating a second current I positively correlated with the temperature2；
Feedback resistor Rf；
The positive input end of the amplifier is connected with the first current module and the second current module, and the positive input end and the output end of the amplifier are connected through a feedback resistor RfConnected, the output end of the amplifier outputs a total output voltage VOUT。
As a further improvement of the present invention, the first current module includes VBETemperature sensor and first resistor R1，VBEThe output of the temperature sensor is inversely related to the temperature VBEThe voltage is applied to the surface of the substrate,
Figure BDA0002396850890000011
the second current module comprises △ VBETemperature sensor and second resistor R2，△VBE△ V with positive correlation between temperature sensor output and temperatureBEThe voltage is applied to the surface of the substrate,
Figure BDA0002396850890000012
as a further improvement of the present invention, said VBEThe output end of the temperature sensor is also connected with the negative input end of the amplifier;
the total output voltage V of the temperature sensor assemblyOUTComprises the following steps:
VOUT＝A*VBE+B*△VBE；
wherein, VBEIs a VBEOutput voltage of temperature sensor, △ VBEIs △ VBEAn output voltage of the temperature sensor, and
Figure BDA0002396850890000021
as a further improvement of the present invention, said VBEThe output end of the temperature sensor is also connected with the negative input end of the amplifier;
zero temperature voltage V of the temperature sensor assemblyDCComprises the following steps:
VDC＝A*V0BE+B*△V0BE；
wherein, V0BEIs a VBEZero temperature voltage of temperature sensor, △ V0BEIs △ VBEZero point temperature voltage of the temperature sensor, and
Figure BDA0002396850890000022
as a further improvement of the present invention, the output end of the VBE temperature sensor is further connected to the negative input end of the amplifier;
the slope Gain of the temperature sensor assembly is:
Gain＝A*GVBE+B*G△VBE；
wherein G isVBEIs a VBESlope of the temperature sensor, G△VBEIs △ VBESlope of the temperature sensor, and
Figure BDA0002396850890000023
as a further improvement of the utility model, the value of B is greater than the value of A.
As a further improvement of the utility model, the value range of A is 1 to 5, and the value range of B is 20 to 70.
Compared with the prior art, the first current module and the second current module are both connected to the positive input end of the amplifier, and the first current I1And a second current I2The sum is passed through a feedback resistor RfAmplified and converted into a total output voltage VOUTAnd then outputting. So that the total output voltage VOUTValue of (D) and a first current I1A second current I2And a feedback resistor RfIs correlated. While the first current I1And a second current I2Both are temperature dependent, so that the zero temperature voltage and slope of the first and second current modules can be obtained, and the feedback resistance R can be adjustedfTo adjust the zero point temperature voltage V of the entire temperature sensor assemblyDCAnd a slope Gain to realize an arbitrary slope Gain and a zero point temperature voltage VDCThe analog output sensor of (1).
Drawings
Fig. 1 is a schematic structural diagram of the temperature sensor assembly of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the temperature sensor assembly of the present invention.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the present invention provides a temperature sensor assembly, which includes:
a first current module 1 for generating a first current I having a negative temperature dependence1；
A second current module 2 for generating a second current I positively correlated with the temperature2；
Feedback resistor Rf；
The positive input end of the amplifier 3 is connected with the first current module 1 and the second current module 2, and a feedback resistor R is arranged between the positive input end and the output end of the amplifier 3fConnected, the output end of the amplifier 3 outputs a total output voltage VOUT。
As shown in fig. 1, since the first current module 1 and the second current module 2 are both connected to the positive input terminal of the amplifier 3, the first current I1And a second current I2The sum is passed through a feedback resistor RfAmplified and converted into a total output voltage VOUTAnd then outputting. So that the total output voltage VOUTValue of (D) and a first current I1A second current I2And a feedback resistor RfIs correlated. While the first current I1And a second current I2Both are temperature dependent, so that the zero temperature voltage and the slope of the first current module 1 and the second current module 2 can be obtained, and the feedback resistance R can be adjustedfTo adjust the zero point temperature voltage V of the entire temperature sensor assemblyDCAnd a slope Gain to realize an arbitrary slope Gain and a zero point temperature voltage VDCThe analog output sensor of (1).
In particular, the circuit configuration shown in fig. 1, combined with the "virtual short" and "virtual break" principles of the amplifier 3,
Figure BDA0002396850890000041
U+＝U-。
thus, it is possible to prevent the occurrence of,
VOUT＝Rf*(I1+I2)+U-(formula 1);
from the above, it can be deduced that the total output voltage V of the temperature sensor assemblyOUTAnd a feedback resistor RfAnd a first current I1A second current I2And (4) correlating. When the temperature is 0, the first current module 1 outputs a first zero temperature current I01The second current module 2 outputs a second zero-point temperature current I02Then the zero temperature voltage V of the temperature sensor assembly can be obtainedDCComprises the following steps:
VDC＝Rf*(I01+I02)+U0-(formula 2) of the reaction mixture,
U0-then the temperature is zero-The voltage of the terminal.
Further, the first slope G of the first current module 1 may be obtained by measurementI1And a second slope G of the second current module 2I2Similarly, the slope Gain of the temperature sensor assembly can be obtained as follows:
Gain＝Rf*(GI1+GI2)+UG-(equation 3), UGThe slope of the U-terminal voltage.
Therefore, the utility model discloses in, can be according to adjusting feedback resistance RfTo adjust the zero point temperature voltage V of the entire temperature sensor assemblyDCAnd a slope Gain to realize an arbitrary slope Gain and a zero point temperature voltage VDCThe analog output sensor of (1), thereby, the utility model provides a temperature sensor subassembly's use is more nimble.
Further, as shown in fig. 2, according to an embodiment of the present invention, the first current module 1 includes VBETemperature sensor 11 and first resistor R1，VBEThe temperature sensor 11 outputs V having a negative correlation with temperatureBEThe voltage is applied to the surface of the substrate,
Figure BDA0002396850890000042
the second current module 2 comprises △ VBETemperature sensor 21 and second resistor R2，△VBEThe temperature sensor 21 outputs △ V positively correlated with the temperatureBEThe voltage is applied to the surface of the substrate,
Figure BDA0002396850890000043
thus, in practice, the first current module 1 comprises VBETemperature sensor 11 and first resistor R1A first current I output by the first current module 11Is composed of VBEOutput voltage V of temperature sensor 11BEDivided by a first resistance R1The second current module 2 comprises △ VBETemperature sensor 21 and second resistor R2A second current I output by the second current module 22Is composed of △ VBEOutput voltage △ V of temperature sensor 21BEDivided by a second resistance R2And (4) obtaining.
VBEThe temperature sensor 11 is a triode in CMOS semiconductor process, and the output voltage V of the triodeBEWill decrease with increasing temperature, but VBEIs largely non-linear, and △ VBEOutput voltage △ V of temperature sensor 21BEIs actually VBEOf (2) thus △ VBEThe curve of the temperature sensor 21 as a function of temperature is actually VBECurve of variation value of (a) with temperature, thus △ VBEThe linearity of (2) is large.
Therefore, according to the above formula 1, the present invention provides a total output voltage V of the temperature sensor assemblyOUTActually, the method comprises the following steps:
Figure BDA0002396850890000051
the total output voltage V of the temperature sensor assemblyOUTSubstantially with VBETemperature sensor 11And △ VBEThe output voltage of the temperature sensor 21 is dependent and can also be adjusted by adjusting the first resistor R1A second resistor R2And a feedback resistor RfTo adjust the total output voltage V of the temperature sensor assemblyOUTThe size of (2). In addition, the VBEThe output of the temperature sensor 11 is also connected to the negative input of the amplifier 3, thus U-＝U+＝VBEThe utility model discloses total output voltage V of temperature sensor subassemblyOUTComprises the following steps:
Figure BDA0002396850890000052
Figure BDA0002396850890000053
for convenience of description, VOUT＝A*VBE+B*△VBE(formula 4), and
Figure BDA0002396850890000054
and, apparently, VBETemperature sensors 11 and △ VBEThe temperature sensor 21 is a temperature sensor having a constant zero point temperature voltage. Note VBEZero point temperature voltage of the temperature sensor 11 is V0BE，△VBEThe zero point temperature voltage of the temperature sensor 21 is △ V0BE。
From the above, the first zero temperature current of the first current module 1 is I01The second zero temperature current of the second current module 2 is I02Then, then
Figure BDA0002396850890000055
In addition, due to the VBEThe output of the temperature sensor 11 is also connected to the negative input of the amplifier 3, thus U0-＝U0+＝V0BE。
Therefore, the zero of the temperature sensor assembly according to equation 2Point temperature voltage VDCComprises the following steps:
VDC＝Rf*(I01+I02)+V0BE；
Figure BDA0002396850890000061
Figure BDA0002396850890000062
Figure BDA0002396850890000063
thus, for convenience of description, VDC＝A*V0BE+B*△V0BE(formula 5), and
Figure BDA0002396850890000064
Figure BDA0002396850890000065
likewise, VBETemperature sensors 11 and △ VBEThe temperature sensor 21 also has a certain gradient, denoted as G, as a temperature sensorVBEIs a VBESlope, G, of the temperature sensor 11△VBEIs △ VBEThe slope of the temperature sensor 21.
From the above, the first slope of the first current module 1 is GI1The second slope of the second current module 2 is GI2Then, then
Figure BDA0002396850890000066
In addition, as described above, the VBEThe output of the temperature sensor 11 is also connected to the negative input of the amplifier 3, so that,
Figure BDA0002396850890000067
further obtain UG-＝ GVBE。
Thus, according to equation 3, the slope of the temperature sensor assembly is:
Gain＝Rf*(GI1+GI2)+GVBE；
Figure BDA0002396850890000068
Figure BDA0002396850890000069
therefore, also, for convenience of description, Gain ═ a × GVBE+B*G△VBE(formula 6), and
Figure BDA00023968508900000610
in the utility model, V is arrangedBEThe temperature sensor module 11 is switched in the negative input of the amplifier 3, which reduces the components of the entire temperature sensor assembly and is also more stable.
Further, the value of B is larger than the value of A in the above formula, and thus, △ V is shown in formula 4BESpecific gravity of (2) relative to VBELarger, △ V, as described aboveBEHas good linearity with temperature, VBEThe linearity along with the temperature change is relatively poor, therefore, B is more than A, the linearity of the temperature sensor assembly of the utility model can be improved, and V is adjustedBEThe non-linearity of the temperature sensor 11 is compensated. Similarly, the linearity of the zero-point temperature voltage of the temperature sensor assembly in equation 5 and the linearity of the slope of the temperature sensor assembly in equation 6 can be improved, so that the adjustment of the zero-point temperature voltage and the slope is more accurate.
Specifically, in the present embodiment, a ranges from 1 to 5, and B ranges from 20 to 70.
To sum up, the utility model discloses in, first current module 1 and second current module 2 all insert amplifier 3's positive input end, first electric current I1And a second current I2The sum is passed through a feedback resistor RfAmplified and converted into a total output voltage VOUTRear output. So that the total output voltage VOUTValue of (D) and a first current I1A second current I2And a feedback resistor RfIs correlated. While the first current I1And a second current I2Both are temperature dependent, so that the zero temperature voltage and the slope of the first current module 1 and the second current module 2 can be obtained, and the feedback resistance R can be adjustedfThe zero point temperature voltage and the slope of the whole temperature sensor assembly are adjusted by the value of (a) to realize an analog output sensor with any slope and zero point temperature voltage.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.
The above list of details is only for the feasible embodiments of the present invention, and is not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. A temperature sensor assembly, comprising:
a first current module for generating a first current I having a negative correlation with temperature1；
A second current module for generating a second current I positively correlated with the temperature2；
Feedback resistor Rf；
The positive input end of the amplifier is connected with the first current module and the second current module, and the positive input end and the output end of the amplifier are connected through a feedback resistor RfConnected, the output end of the amplifier outputs a total output voltage VOUT。
2. The temperature sensor assembly of claim 1, wherein the first current module comprises VBETemperature sensor and first resistor R1，VBEThe output of the temperature sensor is inversely related to the temperature VBEThe voltage is applied to the surface of the substrate,
Figure FDA0002396850880000011
the second current module comprises △ VBETemperature sensor and second resistor R2，△VBE△ V with positive correlation between temperature sensor output and temperatureBEThe voltage is applied to the surface of the substrate,
Figure FDA0002396850880000012
3. the temperature sensor assembly of claim 2, wherein V isBEThe output end of the temperature sensor is also connected with the negative input end of the amplifier;
the total output voltage V of the temperature sensor assemblyOUTComprises the following steps:
VOUT＝A*VBE+B*△VBE；
wherein, VBEIs a VBEOutput voltage of temperature sensor, △ VBEIs △ VBEAn output voltage of the temperature sensor, and
Figure FDA0002396850880000013
4. the temperature sensor assembly of claim 2, wherein V isBEThe output end of the temperature sensor is also connected with the negative input end of the amplifier;
zero temperature voltage V of the temperature sensor assemblyDCComprises the following steps:
VDC＝A*V0BE+B*△V0BE；
wherein, V0BEIs a VBEZero temperature voltage of temperature sensor, △ V0BEIs △ VBEZero point temperature voltage of the temperature sensor, and
Figure FDA0002396850880000014
5. the temperature sensor assembly of claim 2, wherein V isBEThe output end of the temperature sensor is also connected with the negative input end of the amplifier;
the slope Gain of the temperature sensor assembly is:
Gain＝A*GVBE+B*G△VBE；
wherein G isVBEIs a VBESlope of the temperature sensor, G△VBEIs △ VBESlope of the temperature sensor, and
Figure FDA0002396850880000021
Figure FDA0002396850880000022
6. a temperature sensor assembly according to claim 3 or 4 or 5, wherein the value of B is greater than the value of A.
7. The temperature sensor assembly of claim 6, wherein A ranges from 1 to 5 and B ranges from 20 to 70.
CN202020235957.5U 2020-03-02 2020-03-02 Temperature sensor assembly Active CN211425716U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020235957.5U CN211425716U (en) 2020-03-02 2020-03-02 Temperature sensor assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020235957.5U CN211425716U (en) 2020-03-02 2020-03-02 Temperature sensor assembly

Publications (1)

Publication Number Publication Date
CN211425716U true CN211425716U (en) 2020-09-04

Family

ID=72289203

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020235957.5U Active CN211425716U (en) 2020-03-02 2020-03-02 Temperature sensor assembly

Country Status (1)

Country Link
CN (1) CN211425716U (en)

Similar Documents

Publication Publication Date Title
EP2538558B1 (en) Automatic gain control circuit
CN110427067B (en) Method for improving current sampling precision by using analog circuit
CN102323847B (en) Temperature compensation based voltage reference circuit
CN109388173B (en) Current compensation circuit
WO2022040928A1 (en) Temperature measurement circuit, temperature measurement and light measurement circuit, temperature measurement method, and temperature measurement and light measurement method
CN108241079B (en) Electronic load system and parallel operation method
CN101310514A (en) Offset adjusting circuit
CN211425716U (en) Temperature sensor assembly
CN206470289U (en) A kind of MEMS acceleration transducer signals modulate circuit
CN103076837B (en) Feedback type control circuit for current output curve of MOS (Metal Oxide Semiconductor) channel in wide temperature scope
CN111272313A (en) Temperature sensor assembly
CN101860349A (en) Temperature deviation function generators, zero and multiplying factor temperature deviation adjusters and universal temperature compensator
US7345526B2 (en) Linear-in-decibel current generators
CN107918434B (en) Bias current generating circuit of power amplifying circuit
TWI642270B (en) Amplifier circuit
TWI457739B (en) Dynamic power control method and circuit thereof
CN210693945U (en) Multistage parallel light-operated gain control circuit and optical receiver
CN218866381U (en) Voltage regulating circuit and voltage measuring circuit
CA2248337C (en) Offset correction circuit and dc amplification circuit
CN110850159A (en) Device for reducing influence of temperature on diode detector
CN109343606B (en) Separation compensation temperature control device
CN104184459A (en) High-precision analog squaring circuit
CN213988811U (en) Circuit auxiliary system based on etching gallium oxide film on sapphire substrate
WO2022188227A1 (en) Voltage generation unit and electronic device
CN215494756U (en) Analog-digital double-closed-loop bidirectional constant current source

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant