. , , , , , . . - () - () ( ) . 13.
. 13. - -
f1 . -20 /. f2 , (-40 /), U U j = -180. , , f. , ( ) |K| = |bKU|=1, f. b . ,
b = R1/(R1+R2)
(8), (9), b K :
.
,1-- (14)
-
- , , , bKU
: f< f (15)
, 20lg(1/b) , f , 20lg(1/b) . . 13 , K (, , b) (15) , . K<200 , , . 13, .
, . 180 : a =180 + j(f).
. 14 ( ) , a.
, b. . 13 1/b =8000. f =100 a =65. , . a 1/b =200 .
. 14. ,