The timing error detector and loop filter of HDPLL are all digitized, whereas the VCXO employs analog components.
HDPLL中定时误差检测器、环路滤波器是全数字的，而VCXO使用了模拟器件。
2
Automatic reading of analog meter has been a research hotspot recently, but the reading error caused by imaging distortion always exists.
指针式仪表的自动读数是近年来的热门研究内容，但一直存在由成像畸变导致的误差较大的问题。
3
The principle of the analog-digital composite compensation technique is described and the factors causing fitting errors arc analyzed. The formula for calculating the maximum error is derived.