. , , . . , , .
, . (U; I), R ~.
.1.13 .
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.1.13. .
U1 1, U2 2, R2. , . - , R - U=U U
, , , . , , , .. , , , . (.1.14) R1 , R2 , () , , , , .
, . E , .
.1.14 , .1.13.
.1.14 ί ί. R R2. R~=RʷR2/(R+R2). . R~ R= = R + R, , .
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ࠠ ү ү 1 = m ( x 1), 1, ү 1 , m . 堠 I i1= (U u1)/R~.
∆ί=Iʖί1 ∆u=Uݖu1 ∆ίR ~ = ∆u.
1.9 R2 = 3
: .1.11
R=2, R=1,2
U=6 , I=2
:
R~=R R2/(R + R2) =
2 3/(2 + 3)=1,2.
∆i/∆u = 1/R ~.
∆ί ∆u
,
.
:
1. .
∆i=1, ∆u = ∆ί R~ = 1 1,2= 1,2
' :
I'=I + ∆ί=2 + 1=3,
U'=U +∆u=6,0 1,2=4,8.
2. .
∆u=1,2, ∆ί= ∆u/R~ = 1,2/1,2= 1.
'':
U''= U + ∆u=6,0 + 1,2 =7, 2; '' = I+ ∆ί=2 1,0=1,0.
' ''.
.1.15 1.5 , 1.9.
:
, ί 1 3, u 1,2 4,8. '
u =4,8, ί=3 , . , (.1.15).
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'' ( U=7,2; =1 ).
, . :
U()=U +∆U=U +∆ R~ = 6,0 + 2 1,2=8,4; =0.
um=U U=8,46,0=2,4. . U ( u=0). , ≈ ( ).
- (), () () .
Fastmean , , .
.
, , , , .
[1--3 ].
Fastmean (.1.16).
.1.16 () .
:
- , = / C,
- , C - , .
- ,
- , - , - .
, + = h11.
, f h21. .
1.10 .1.16.
: : h21=150, f=200,
C=12, τ =100, I=I=2.
: = τ/ C=100/12=8,3,
r ׳ =(1+150)*25/2=1887 ,
=150/(2π*200* 1887)=63,28.
.1.13. .1.17.
.1.17 .1.13.
1.11 .1.13
: 1.2 R=1.2 , R=1,8 ,
R1=62 , R2=24 .
R1=70 ,
R2=400 , 2=10 .
C1= C2==1,
1.10.
: .1.17
.1.16,
.1.13, -
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Fastmean.
1.18
. 1.18 .1.13
h21= -150 /. . , . , , . ( f=100 ). Y , Y db . Y 1.11 db(mag(U(5)/U(7)), U(5) R2 (.. ), U(7) U1 (.1.18). .1.19.
-3 , , . .1.19 =20lg(U(5)/U(7))=27,9 .
f f -3=24,9 . .1.19
f=4,538 . , , f=12,6 .
.1.19 .1.13 1.11
.1.20 .1.13 1.11
.1.20 . , . , , , 180, 180 Y. Y (.1.20).