4- (.1.57). ( ), . Þ
( j3 = j4 ) Þ(U = j3 -j4 =0).
:
1) U, , U =0;
2) R1 R4 ;
3) UH .
(.1.58). VT1 - RK1 VT2 - RK2. 4- . . , R1 =R2,
R1 =R2. . ( ).
.1.58.
1 2, 1=2, =å =1+2 =2.
U = U1 - U2, R , R .
:
) ;
) (.1.59,);
) (. 1.59,).
. , U. , , U.
U = U1 -U2=U1 -U2=(U1 -U2)
, . , , .
.1.59. |
. U . , .
:
U
.
, U . . .
() . , , , . , .1.58, U2 U1 - ,
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U2 - .
() , , . , .
.1.60. |
U 200000,
R ,
I - ( ). : D f=(01).
(.1.60).
U = f(U) (1.61).
.1.61. |
.1.62. |
U , U . , U =100×103 =10,
U =0,0002.
(.1.62.).
U =(U U u); U =U.
U U u .
.
. () . - .1.63, - ;
.1.63. |
, β = ;
U - ;
KOC =U /U - .
:
1. - +
2. - -
+: U =U +U,
-: U =U -U.
, :
- - ~ U;
- - ~ I;
- - ~ I, U.
(.1.69) , , = . + = , - = .
(- , + ).
.
1. - . - . , . =f(), , ,
,
.. (1+ b ) , . .
2. - (.1.64.). K <K, , .
D f D f, , D f > D f, .. C .
.1.64. |
3. . - , . , - .
4. .
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|
, -,
R =R (1+ b ), R = .
- R R.
, , .
- .
1 (.1.65). R. , , .
.1.66. |
.1.65. |
2 (.1.66). R. : U +U -U = 0 ( ), U= U - , .
U =U -U =U -IR, I I =I Þ U =U -IR.
, , , .. . , R -.
.
.1.67,, R
. , U =UOC,
.1.67.
U =(U U )=(U - U). , .
, - , .
:
= .
b >>1( , K>>1), 1 ,
= , b = ; U = ,
b = = ,
= = =1+ .
R1 R, .
.1.67,.
I U .
I +I - I =0, I = -I.
:
, I = , .
U, UR1 =U, U =U,
, .
- , .
(.1.68) . , U =å aiUi;
.1.68. |
:
I1 +I2 +I3 +I - I =0.
, ,
I1 +I2 +I3 = -I;
U1 /R1 +U2 /R2 +U3 /R3 =-U /R;
(R /R1)U1 +(R /R2)U2 +(R /R3)U3 = -U;
U1 +a2U2 +a3U3 = -U;
R1 =R2 =R3 =R, a 1 = a 2 = a 3 =1,
U = -å Ui. ,
, =1.
(.1.69) U = . , I1 + I =I.
.1.70. |
.1.69. |
I, I1 = -I. ,
I =C ,
U /R1 = -CdU /dt; U dt /(R1C) = - dU;
U = - , U(0) .
.1.70 .
(.1.71).
. , , : VT1, VT2 (.1.72).
.1.72. |
.1.71. |
VT1. VT1 , VT2. . IH , , .
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