针对时频测量出现的±1误差,即极短的时间间隔,提出一种基于多周期同步与模拟内插结合的时间电压转换法。利用D触发器、集成运放等设计了该方法的相应电路,成功实现了不受时钟频率影响的测量模块,并将测量误差减小至0.02%,减小了极短时间间隔对测量精度的影响。
Aiming at ±1 error in the measurement of time-frequency, which is a very short time interval, a time to voltage conversion method based on multi-cycle synchronization and analog interpolation combination is proposed. A circuit is designed to implement this method by using D flip-flop and integrated operational amplifier. The measuring module regardless of the clock frequency is successfully achieved, the measurement error is reduced to 0.02%, the effect of measurement accuracy by the very short time interval is effectively reduced.