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Integral-type digital temperature sensing circuit

A technology of temperature sensing circuit and integrating capacitor, which is applied in the field of circuits, can solve the problems of poor stability and low flexibility, and achieve the effects of reducing design errors, good stability, strong flexibility and adjustability

Active Publication Date: 2019-06-21
JIANGSU JICUI MICRO NANO AUTOMATION SYST & EQUIP TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When the existing technology is applied, it cannot work normally under low power supply voltage, has poor stability, and its flexibility is not high

Method used

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  • Integral-type digital temperature sensing circuit
  • Integral-type digital temperature sensing circuit
  • Integral-type digital temperature sensing circuit

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0020] Terminology Explanation: (Explanation of terms that should be listed out)

[0021] Proportional ToAbsolute Temperature: proportional to the absolute temperature, ie PTAT;

[0022] Complementary ToAbsolute Temperature: Complementary to absolute temperature, ie CTAT;

[0023] Analog-to-Digital Converter: Analog-to-Digital Converter, namely ADC;

[0024] Dynamic Element Matching: dynamic element matching, that is, DEM;

[0025] Chopping Technique: chopping technique;

[0026] BJT: Bipolar Junction Transistor, that is, bipolar junction transistor;

[0027] SPI: Serial Peripheral Interface, that is, the serial peripheral interface;

[0028] PWM: Pulse Width Modulation, that...

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PUM

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Abstract

The invention discloses an integral-type digital temperature sensing circuit. The integral-type digital temperature sensing circuit comprises a PTAT circuit module, a switch, a CTAT current module, anintegrator, a window comparator and a control and conversion logic component. The integrator comprises an integral capacity and an amplifier. The two ends of the integral capacity are connected to aninput end and an output end of the amplifier. The control and conversion logic component comprises a controller, a counter, a temperature calculator and two SPI modules. The circuit has advantages that a low power supply voltage work condition is not considered in the prior art, but the circuit of the invention adapts to the low power supply voltage work condition; a chopper technology is used toreduce a design error; and the circuit has high flexibility and adjustability, and good stability.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an integral digital temperature sensing circuit. Background technique [0002] In the 1960s, W.T.Matzen and R.A.Meadows et al. proposed a design theory of thermoelectric elements whose manufacturing process is compatible with the integrated circuit process. Two years later, T.F. Prosser proposed and successfully developed the world's first integrated temperature sensor chip. With the development of functional circuit integration, a large number of integrated temperature sensors have been developed, with more and more functions, and their performance is constantly improving. More well-known integrated temperature sensor production companies, such as Texas Instruments (TI), American Analog Devices (ADI), etc., have widely used their products in industry, medical equipment, computers and consumer products. [0003] Universities and scientific research institutes in various countries are al...

Claims

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Application Information

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IPC IPC(8): G01K7/01
Inventor 齐敏孙泉吕海飞
Owner JIANGSU JICUI MICRO NANO AUTOMATION SYST & EQUIP TECH RES INST CO LTD
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