Page 151 - 30105-2003 การวิเคราะห์วงจรอิเล็กทรอนิกส์ความถี่สูง

143

3.

g m
ก !ก (1.16) C b c ′ = C ob = C re ,C b e ′ = − C ob ;
π
2 F T
2 C N
2
ก !ก (3.11) C N S = P P
S
2
C N
C = S S
P 2
N P
, C = C , N = N , C = C , N = N ;
′
P b ep P 11 S b e ′ S 21
2
C N 21
b e ′
C b ep = (3.25)
′
N 2 11
1
ก !ก (3.1b) F =
R
2π LC
, F = F ( R L 11 ) , L = L 11 , C = C BT + C b ep ;
′
R
1
F R (L 11 ) =
2π L 11 ( C BT + C b ep )
′
1
( C BT + C b ep ) = 2
′
( )
π
L 11 ( 2 F R L 11 )
1

$
C BT = 2 − C b ep (3.26)
′
( )
π
L 11 ( 2 F R L 11 )
1
ก !ก (3.1b) F =
R
2π LC
, F = F ( R L 22 ) !8 ,.

.' L
R
22
L = L 22 , C = C CT ;

1

$
C = (3.27)
CT 2
L ( 2 Fπ )
22 R (L 22 )
"#
3.19 + %! 9 C % C
BT CT
g m ;
- ,
ก !ก (1.16) C b c ′ = C ob = C re ,C b e ′ = − C ob
π
2 F T
×
397.937 10 − 3 − 12 209.919 pF
×
C b e ′ = 6 − 1.3 10 =
×
×
×
2 3.14 300 10
×
C N 2 21 = 209.919 10 − 12 ( ) 1 2 209.919 pF
b e ′
ก !ก (3.25) C = = =
′
b ep 2 2
N 11 ( ) 1
ก

ก
ก