. 5.18 , . .
. 5.18. , .
National (AF100 AF150), Burr‑Brown ( UAF) . , , RG, RQ RF. , . , Q ( ) . , .
. , ; , . , ; .
. , , , () . , , . , . 5.18 , , RF , RQ RG Q
RF = 5,03107/ f0 ,
RQ = 105/(3,48 Q + G 1) ,
RG = 3,16104 Q / G .
, Q RF (). , RQ, Q (, , ).
5.4. . 5.18 , f 0 = 1 , Q = 50 G = 10.
. 5.19 .
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. 5.19. Q
, (. . Q) . , Q, . Q, :
f 0 = 1/2π RFC, Q = R1 / RQ, G = R1 / RG,
R ~= 10 ( , ).
. . 5.20 . .
. 5.20. .
( RF) ( , Q). :
f 0 = 1/2π RFC, BW = 1/2π RBC, G = RB / RG.
Q f0 / BW RB / RF. ( RF) Q, Qf0.
( , ), :
1. f, 1020 Qf0.
2. , = 10/ f0 .
3. RF .
4. RG.
5. RG.
, , . , , RB ( . 4.19 ‑ ). , RF, RB RG , , , , 5 . , , 1 ( RF) ( , 10 ).
, , . , = 0,01 . R F = 15,9 (f0 = 1 ) RB = 796 (Q = 50; BW = 20 ). , RG = 79,6 (G = 10).
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5.5. : f 0 = 60 , BW = 1 G = 100.
. . , , (, ). , ( ).
, , , ( ). , , ‑ . 3 , , , , , .
. , (IBM PC, Macintosh).
5.09. ‑ ‑
. 5.21 RC‑ , fc = 1/2π RC.
. 5.21. T‑ ‑.
R‑, , , 180. fc . ‑ , 60 . , , RC‑, fc . , ‑ , , 10 , ( ) fc, 3 , ( ) fc. (. 5.22).
. 5.22. ‑ .
, ‑ . , ( ) .
‑ 1 50 60 ( ). , . .
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‑ , , , . . 5.23, RC‑, ‑ , ( ) .
‑ ( ), ; , () . :
f = 1/2 √(3 R1R2)
. 5.23, , 25 100 . 50 .
. 5.23. ‑ . 25 100 .
‑ , ( ) ( ) . , , ( . 5.22).
, , , , .