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Along with the accuracy enhancement of different kinds of frequency standards, more demands are made on the measurement precision. In time and frequency measurement instruments, both digital and analog processing techniques and circuits are used widely. The paper focuses primarily on the limitations of the technology and the principle in the use of the analog and the digital measurement approaches...
A simple length vernier approach has been developed which uses the high stability and high speed of signal transmission and the relation of time and space. It can get high resolution, low cost and simple structure. Based on high stable transmission delay of the signal and the coincidence detection technique, the start and stop signals of a measured short time interval are delayed respectively in the...
Because of the development of the frequency standard technique, the higher precision request to the measurement techniques is necessary. For enhancing measurement precision and reducing measurement cost, we developed a time interval measurement technique based on time-space relationship. The high-resolution coincidence detection is very important because it is basic condition for getting high precision...
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