A Time Domain Power Supply System for Temperature Sensor

Abstract

The invention discloses a time-domain power supply system for a temperature sensor, comprising: an auxiliary expansion circuit, a switch tube, a load resistor, a lower limit correction resistor and a gain resistor; a power supply compensation circuit consisting of a linear compensation resistor, an integral compensation network, a current converter, Composed of voltage converter, linear amplifier and current source; power supply voltage adjustment circuit, composed of primary one-way capacitor, voltage regulator and secondary one-way capacitor; reference voltage protection circuit, including: adjusting resistor, Zener diode and over-current Protector, power gain circuit, composed of filter, first-level feedback circuit, second-level feedback circuit and current source loop, can get better power supply rejection ratio; the phase of the power supply voltage of the power gain circuit is equal to the phase of the output terminal of the first-level feedback circuit The phase difference with the output terminal of the secondary feedback circuit has good power supply suppression performance.

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...

AI Technical Summary

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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