, . : ( ), , , ; ( ) , , , .
. 1. , R. , , iC = C (dUC/dt). , R,
U .
U << U, , U, U . U << U UC , R , .. R << 1/wC ( ) R << 1/wC, w .
t = RC . , () . t = t = RC 63 % , t = 2,3 t - 90 % U 4,6 t - 99 % U.
(. 1) t (. 2, ). t = 10 t. , . 2, . , , . . . , , UBX = UC + U. t ³ 3 t , .
(UBX = 0), R . , . , R. ( t > 4¸5 RC). . 2,,.
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, . (. 3) (. 1) , . R, .. U = UC << UR, i , .
i = UBX / R U .
, R >> 1/wC ( RC >>1/w) R >> t. .
(. 4, ), t t = RC, (. 4, ), .