, . , , .. .
3.1. .
. , , . , , . , , . .
:
- R.
- , . 20.
. 20
(. ).
1, 14, 1. .
.21
R1, R1 R. . :
U= Ux + Ux(R1/R), (1)
Ux , R1- ( . 20), R .
5, 6, 5, 17, 16, 15, 3, 4, 10, 19, 12, 6, 3, 8, 10, 8, 7 .
. 22
R1 R2, . - , R1 R2, . :
U=U (R1R2 +RR2)/(RR1+RR2) (2)
U R2 R, :
R = R2* R/(R2+R) (3)
R1 R2 .20.
: . - - .