( ( ( Common ( ( impedance ( , ( and voltage ) ) ) fluctuations ) ) ( with ( signal ( in ( the ( power ( supply circuit ) ) ) ) ) ) ) ( ( causes ( ( a ( continuous variation ) ) ( of ( bias voltage ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Common) (ADJP (JJ impedance) (, ,) (CC and) (JJ voltage)) (NNS fluctuations)) (PP (IN with) (NP (NP (NN signal)) (PP (IN in) (NP (DT the) (NN power) (NN supply) (NN circuit)))))) (VP (VBZ causes) (NP (NP (DT a) (JJ continuous) (NN variation)) (PP (IN of) (NP (NN bias) (NN voltage))))) (. .)))
Common impedance, and voltage fluctuations with signal in the power supply circuit causes a continuous variation of bias voltage.
(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))))))) (. .)))