| 摘要 |
One aspect of the present invention relates to a digitally controlled resistance standard, comprising a control system, a resistor element, hermetically sealed within an element assembly, a temperature/frequency measuring circuit for measuring the temperature of the resistor element and the frequency of an input signal, a heating/cooling assembly for raising and lowering the temperature of the resistor element a temperature controller for controlling the heating/cooling assembly, and a control system having a CPU. The control system is operable to execute computer instructions for storing the baseline characteristics of the resistor element, retrieve the temperature of the resistor element from the temperature/frequency measuring circuit, determine the actual resistance value of the resistor element, and adjust the actual resistance value of the resistor element to match a target resistance value using the temperature controller. A method for improving the accuracy of a resistance standard is also given.
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