Anstract: This paper describes a method for a uniform sampling of periodic signals based on using successive f -> V and V -> f conversion. It is shown that a conventional analogue-to-frequency converter is suitable to be used as a controllable pulse generator providing the sampling pulses the frequency of which is proportional to the sampled signal frequency. The proposed approach eliminates disadvantages of conventional methods: jitter inherent to implementation of phase-locked-loop and truncation error of programmable pulse-rate-divider. This allows implementation of the double-conversion method in high precision industrial and laboratory measurement instrumentation. The practical solution is described and the experimental results are also presented.
Key words: Uniform sampling, analog to frequency converter, double conversion, phase locked loop.