CN208043267U - A kind of digital temperature sensors of CMOS - Google Patents
A kind of digital temperature sensors of CMOS Download PDFInfo
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- CN208043267U CN208043267U CN201721896449.6U CN201721896449U CN208043267U CN 208043267 U CN208043267 U CN 208043267U CN 201721896449 U CN201721896449 U CN 201721896449U CN 208043267 U CN208043267 U CN 208043267U
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Abstract
The utility model discloses a kind of digital temperature sensors of CMOS, including cascade pulse generator, time-to-digit converter and counter successively, wherein：The pulse generator is used to generate the pulse signal with certain pulse width according to temperature change；The time-to-digit converter is used to convert the pulse width of the pulse signal to digital code；The counter after converting digital code to binary digit for exporting, and this application provides a kind of digital temperature sensors of CMOS, and circuit structure is simple, simple for process, and repeatability is strong, advantage at low cost.
Description
Technical field
The utility model is related to integrated circuit fields, and in particular to a kind of digital temperature sensors of CMOS.
Background technology
With the sustainable growth in handheld device market, the demand to high-performance temperature sensor is more and more powerful.Temperature passes
Sensor is widely used in following field such as：(1) environmental temperature monitoring in factory automation；(2) inside single-chip or multi-chip
Monitoring temperature and compensation；(3) power consumption control of CPU and other super large-scale integration.
In order to meet use above demand, temperature sensor must realize low-power consumption, low cost.Traditional temperature sensor
It is realized using the framework of Bandgap plus ADC：Bandgap generates a temperature independent reference voltage, then related to temperature
Voltage compare, generate difference, be converted into digital signal finally by ADC.
Traditional structure needs Bandgap and ADC using the method for simulation, and circuit structure is complicated, is not easy to realize and integrate
Circuit technology relevance is strong, of high cost.
Utility model content
In view of this, the application provides a kind of digital temperature sensors of CMOS, circuit structure is simple, simple for process, can
Repeated strong, at low cost advantage.
In order to solve the above technical problems, technical solution provided by the utility model is a kind of digital temperature sensing of CMOS
Device, including cascade pulse generator (1), time-to-digit converter (2) and counter (3) successively, wherein：
The pulse generator (1) is used to generate the pulse signal with certain pulse width according to temperature change；
The time-to-digit converter (2) is used to convert the pulse width of the pulse signal to digital code；
The counter (3) after converting digital code to binary digit for exporting.
Preferably, the pulse generator (1) includes：
Signal input part (11) generates initial signal for temperature change；
The signal input part (11) is divided into two-way, connects XOR gate (13), another way by delay unit (12) all the way
It is directly connected to the XOR gate (13), two paths of signals forms the pulse with certain pulse width by XOR gate (13) afterwards
Signal.
Preferably, the pulse width of the pulse signal is directly proportional to the value of the temperature.
Preferably, the delay unit (12) is in series by several inverter modules.
Preferably, the time-to-digit converter (2) includes：Pulsewidth counter, the arteries and veins for calculating the pulse signal
Rush width；Comparator, for compared with the pulse width of standard-frequency signal, obtaining the pulse width of the pulse signal
Comparison result is the digital code.
Preferably, the numerical values recited of the digital code is directly proportional to the pulse width of the pulse signal.
This application discloses a kind of digital temperature sensors of CMOS to has the following advantages compared with prior art：
1, the pulse generator of the application generates pulse signal, the pulse width and temperature value of the pulse signal according to temperature
It is directly proportional, by converting the temperature value that is detected of pulse width of pulse signal, have that correlation is high, good excellent of accuracy
Point；
2, pulse generator disclosed in the present application is simple in structure, and function-stable is at low cost；
Description of the drawings
Fig. 1 is the schematic diagram of the utility model；
Fig. 2 is the schematic diagram of pulse generator (1) in the utility model.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
As depicted in figs. 1 and 2, the digital temperature sensors of a kind of CMOS, including successively cascade pulse generator (1),
Time-to-digit converter (2) and counter (3), wherein：
The pulse generator (1) is used to generate the pulse signal with certain pulse width according to temperature change, including：
Signal input part (11), the signal input part (11) generate an initial signal according to temperature change；
The signal input part (11) is divided into two-way circuit, and the initial signal is generated by delay unit (12) all the way
By connecting XOR gate (13) after time delayed signal, initial signal described in another way is directly connected to the XOR gate (13), starting letter
Number and time delayed signal formed by XOR gate (13) after have certain pulse width the pulse signal, due to CMOS tube with
Temperature ramp-up rate is slack-off, and delay is elongated, therefore the pulse width of the pulse signal is directly proportional to the value of temperature.
The delay unit (12) is specifically in series by even number of inverters unit.
The time-to-digit converter (2) is used to convert the pulse width of the pulse signal to digital code, specific to wrap
It includes：Pulsewidth counter, the pulse width for calculating the pulse signal；Comparator is used for the pulse of the pulse signal
For width compared with the pulse width of standard-frequency signal, obtained comparison result is the digital code.The numerical value of the digital code
Size is directly proportional to the pulse width of the pulse signal.
The pulsewidth counter after converting digital code to binary digit for exporting, the temperature value detected.
The digital temperature sensors of CMOS disclosed in the present application have advantage simple in structure, easy to process, at low cost.
Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard
For limitations of the present invention, the scope of protection of the utility model should be subject to claim limited range.For
For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several
Improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of digital temperature sensors of CMOS, which is characterized in that including cascade pulse generator (1), time number successively
Word converter (2) and counter (3), wherein：
The pulse generator (1) is used to generate the pulse signal with certain pulse width according to temperature change；
The time-to-digit converter (2) is used to convert the pulse width of the pulse signal to digital code；
The counter (3) after converting digital code to binary digit for exporting.
2. the digital temperature sensors of a kind of CMOS according to claim 1, which is characterized in that the pulse generator
(1) include：
Signal input part (11) generates initial signal for temperature change；
The signal input part (11) is divided into two-way, connects XOR gate (13) by delay unit (12) all the way, another way is direct
The XOR gate (13) is connected, two paths of signals forms the pulse with certain pulse width afterwards by XOR gate (13) to be believed
Number.
3. the digital temperature sensors of a kind of CMOS according to claim 1 or 2, which is characterized in that the pulse signal
Pulse width it is directly proportional to the value of the temperature.
4. the digital temperature sensors of a kind of CMOS according to claim 2, which is characterized in that the delay unit (12)
It is in series by several inverter modules.
5. the digital temperature sensors of a kind of CMOS according to claim 1, which is characterized in that the time-to-digital converter
Device (2) includes：Pulsewidth counter, the pulse width for calculating the pulse signal；Comparator is used for the pulse signal
Pulse width compared with the pulse width of standard-frequency signal, obtained comparison result is the digital code.
6. the digital temperature sensors of a kind of CMOS according to claim 1 or 5, which is characterized in that the digital code
Numerical values recited is directly proportional to the pulse width of the pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721896449.6U CN208043267U (en) | 2017-12-29 | 2017-12-29 | A kind of digital temperature sensors of CMOS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721896449.6U CN208043267U (en) | 2017-12-29 | 2017-12-29 | A kind of digital temperature sensors of CMOS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208043267U true CN208043267U (en) | 2018-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721896449.6U Active CN208043267U (en) | 2017-12-29 | 2017-12-29 | A kind of digital temperature sensors of CMOS |
Country Status (1)
| Country | Link |
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| CN (1) | CN208043267U (en) |
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2017
- 2017-12-29 CN CN201721896449.6U patent/CN208043267U/en active Active
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Effective date of registration: 20220129 Address after: 1 / F, 144 Tianshun Road, hi tech Zone, Chengdu, Sichuan 610000 Patentee after: CHENGDU ZHONGYU MICROCHIP TECHNOLOGY CO.,LTD. Address before: Building 23, Science Park, University of Electronic Science and technology, No.1 Gongxing Avenue, Gongxing Town, Shuangliu District, Chengdu, Sichuan 610213 Patentee before: CHENGDU JULI ZHONGYU TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |