Time domain power supply system of temperature sensor

Abstract

The invention discloses a time domain power supply system of a temperature sensor. The time domain power supply system comprises an auxiliary expansion circuit, a switching tube, a load resistor, a lower limit correction resistor and a gain resistor. The power supply compensation circuit is composed of a linear compensation resistor, an integral compensation network, a current converter, a voltageconverter, a linear amplifier and a current source. The power supply voltage adjusting circuit is composed of a primary unidirectional capacitor, a voltage stabilization adjuster and a secondary unidirectional capacitor. The reference voltage protection circuit comprises an adjusting resistor, a voltage stabilizing diode, an over-current protector and a power supply gain circuit. The power supplygain circuit is composed of a filter, a primary feedback circuit, a secondary feedback circuit and a current source loop, and a good power supply rejection ratio can be obtained. The phase of the power supply voltage of the power supply gain circuit is equal to the difference between the phase of the output end of the first-stage feedback circuit and the phase of the output end of the second-stage feedback circuit.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to a time-domain power supply system for a temperature sensor. Background technique [0002] Sensors are widely used in military, aerospace, scientific research, industry, agriculture, medical, transportation and other fields and departments, and have very broad application prospects. With the introduction of the concept of sensor intelligence, people's requirements for sensors are getting higher and higher, especially the temperature sensor, which has the highest demand for sensors. High precision and intelligence are becoming the development direction of temperature sensors. The power supply of temperature sensors The work is very important. The invention patent with application number 201810484643.6 provides a self-powered temperature sensor, which connects the inner wall of the right side of the housing with the power supply device, and electrically connects the left side o...

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Problems solved by technology

[0003] The current power supply system of the temperature sensor easily causes the internal circuit of the sensor to consume large power consumption, and the internal line resistance will also bring measurement errors, which makes the measurement accuracy not high, which is not conducive to the long-term development of the sensor field. The existing technology can no longer meet the current needs. stage people's needs, based on the status quo, there is an urgent need to reform existing technologies

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