, . , , , .
. /(1 + ). , = 1/ . , , , (. 4.69).
, . , ( , , . .). , , , . 4.67.
. 4.67.
, , ( 10 ). , = 0,1 ( ). 1000/[1 + (10000,1)] 9,9 10 000/[1 + (10 0000,1)], 9,99. 1 %. , , +10 , 0,04 . , 1000, , . ( ) . ( Electrical Engineering, 53, 114 (1934)): , , , , 40 (10 000‑ ), , , , , .
G (dG / dA), , : Δ / = [1/(1 + )] Δ / . , , . , , .
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, .
. , ( ). , , , . .
(1 + ) ( ), . ( ) . , , ; . , , .
, . . (. 4.68).
. 4.68.
U U, U = U U.
R' = U / I = (1 + AB) R
, . 4.69.
. 4.69.
= R1 /(R1 + R2), ΚU = 1 + R2 / R1, . , .
. , (. 4.70).
. 4.70. , Z = R2/(1 + k), Z = Ζ ( )/(1 + ) (); , Z = R1 + R2 /(1 + ), Z = Ζ ( )/(1 + B), = R1 /(R1 + R2).
() () ( ; ). R2 (1 + ) ( ). (, ) , . (. 4.22) (. 4.14).
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, , , . R1 . R R1 .
.
q = A (1 B)/(1 + AB)
, = R1 /(R1 + R2). , G = 1/ + 1 (. . G = R2 / R1).
4.11. .
. , , , . (1 + ) , ‑ . . , . 4.71.
. 4.71.
. : , U; I, R' = U / I. U , B / U, ABU.
,
R' = U / I = R /(1 + AB)
, . . ,
R' = R (1 + AB)
, . :
R' = R [1+ (AB).. /1 + (AB).. ]
(AB).. ‑ ; (AB).. ( ). , . .
. , , β ‑ . . , β ‑ ( , ), . , , β ‑ , . . .