T h e p a p e r in tro d u c e d th e p rin c ip le o f c u rre n t m e te r c a lib ra tio n sy ste m , a n a ly z e d th e c h a ra c te ris tic a n d d iffic u lty o f sig n a l s a m p lin g . C o n sid e rin g th a t th e sig n a l o f c u rre n t m e te r is e a sy to b e d isto rte d by e x te rn a l d is tu rb a n c e , th is p a p e r d e s ig n e d a sig n a l c o n d itio n in g c irc u it. A c c o rd in g to v a rio u s p e rio d o f sa m p lin g sig n a l o f c u r r e n t m e te r, th is p a p e r c o m p a re d a n d a n a ly z e d th e e rro r o f fre q u e n c y m e a su rin g m e th o d a n d p e rio d m e a su rin g m e th o d , so a s to d e te rm in e d iffe re n t so ftw are filte rin g m e th o d s in d iffe re n t sp e e d ran g e. T h e d e sig n w as p ro v e d to b e fe a sib le an d effe ctiv e b y sim u la tio n . A n d th e d esig n c a n im p ro v e th e a c c u ra c y o f th e sig n a l a c q u is itio n an d th e h a rd w a re d e sig n is re a liz e d on a s in g le —c h ip p latfo rm .