( ( To ( ( memorize ( analog signal ) ) ( in ( analog circuit ) ) ) ) ( , ( ( a capacitor ) ( ( was ( ( used , ) ( which ( can ( ( maintain ( its ( terminal voltage ) ) ) ( for ( a while ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB memorize) (NP (JJ analog) (NN signal)) (PP (IN in) (NP (JJ analog) (NN circuit)))))) (, ,) (NP (DT a) (NN capacitor)) (VP (VBD was) (VP (VBN used) (, ,) (SBAR (WHNP (WDT which)) (S (VP (MD can) (VP (VB maintain) (NP (PRP$ its) (NN terminal) (NN voltage)) (PP (IN for) (NP (DT a) (NN while))))))))) (. .)))
To memorize analog signal in analog circuit, a capacitor was used, which can maintain its terminal voltage for a while.
(ROOT (S (NP (NNP Voltage)) (VP (VBZ is) (ADJP (RB continuously) (VBG changing) (PP (IN within) (NP (NP (DT a) (NN circuit)) (PP (IN in) (NP (DT an) (JJ analog) (NN signal))))))) (. .)))