:
;
;
, . . , , , ;
: () 100 , 0,1 .
. .
1. (). . .2.1, . .2.1. . .2.2. .
. .2.1
. .2.2
1. 1 ( ).
2. 2 = 2 1.
3. R1 R2:
,
f .
(. 1) = = (1001000) 1 ( ), R 3 = R 4 = 100 .
2. (). . .2.3, . .2.3. . .2.4.
) | ) |
. .2.3
. .2.4
1. 1 = 2 ( ).
2. R1:
,
3. R2:
,
f .
(. 3) = = (1001000) ∙ 1 ( ).
3. . . .2.5, . .2.5. . .2.6.
) | ) |
. .2.5
. .2.6
Q = 10, k = 10,
.
, k = 20 . 40 . , .
1. 1 = 2.
2. :
|
|
,
f .
3. R 2 = R 1/19 R 3 = 19 R 1.
(. 3) = = (1001000) ∙ 1 ( ).
4. . . 7, . .2.7. . .2.8. .
) | ) |
. .2.7
. .2.8
, - . , , , .
1. 2 .
2. 1 .
(. 3) = = (1001000) ∙ 1 ( ).
5. -. . 9, . .2.9. . .2.10. .
) | ) |
. .2.9
. .2.10
Q = 10. R1 R2. , :
.
1.
.
1. 1 = 2.
2. :
,
f .
3. R 1 = R 2 = 20 R 3.
(. 3) = = (1001000) ∙ 1 ( ), R 5 = R 6 = 100 .
5. . . .2.11, . .2.11. . .2.12. .
) | ) |
. .2.11
. .2.12 |
, ,
1. 2 .
2. 1 .
(. 3) = =
= (1001000) ∙ 1 ( ). R 3 = R 4 = R 5 = 100 .
3
( ), ( ). -- . (0,51 ) - , . .
|
|
. .3.1. ( > 0 . .3.1; < 0 . .3.1) VD2 . , . .
. .3.1
. .3.2 |
. .3.2. . (DA2) (DA1).
DA1. DA1 2 , VD1 , VD2 . 1 = . , 2 , VD1 , VD2 . , . VD1 , 1 .
1
(DA2)
.
1,
.
, R 1 = R 2 = R 3 = R, R 4 = R 5 = 2 R.
. .3.3 ( > 0 . 3, ; < 0 . 3, ).
. .3.4, . 3.4.
. .3.3
. .3.4
1. . . : . .: - , 1989. 50 .: .
2. . ., . ., . ., . . : . .: - , 1999. 32 .: .
3. . . - . .: "-XXI", 2005. 528 .
4. . . : . 5- . : ; .: -, 2006. 416 ., .
5. . . . . .: "", 1974. 216 .: .
6. Bruce Carter. Filter Design In Thirty Seconds. High Performance Analog. Texas Instruments Application Report. SLOA A093 December 2001.