A Simulation of a Simple Design PT100 RTD
Liu Yue-ru · Computer Knowledge and Technology · 2012
This paper presents a simulation PT100 thermal resistance of the circuit design。The design utilizes a precision op amp buffers the input voltage through D/A converter to adjust the voltage applied to the standard resistor and the current ratio,thus changing the resis tance value。Through the built-in precision resistance measurement circuit measured the op amp's offset voltage,and use D/A converter automatically compensate for the offset voltage can be synthesized to obtain high-precision programmable resistors to meet the PT100 ther mal resistance of long-term stability requirements.