(.3) ( 1-2), :
U = U- I (R + R)(5)
, ( 1) ( 2) . 1: I = 0, U = ; 2: U =0, I = /(R + R ).
.3. :
- ; - .
I U ( ) . , I , (.3). . , I , ( 0 U).
.
( ) ( ). , 2 , R R .
(6)
, . , / R ( . 3). , ( 3-4 . 3).
R ( ). u i (.3). . , , i . (2,3), . R ( U R= i R), u = - i R . . , 1800 (.3). R, R R, .
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. (.3).
P = U I , I - U , . .
, , , (∆U = 0,30,7) (.3).
, , .
:
, (7)
w = 1/(R+R) .
(7) , , .
h- , (.4), ( ). , U I , U I .
.4.
, : . h 11 , h 21 I , 1/ h 22 , .
, . R R . R=R1||R2 , R1, R2 .
I=(3-10)I. (6)
R1 R2 .1 :
(7)
R>> h 11:
R= U / I = R h 11/(R+ h 11)≈ h 11 (8)
R<<1/ h 22:
(9)
, (10)
S = - .
(11)
II.