TL084_01 Datasheet, PDF (9/12 Pages) STMicroelectronics – GENERAL PURPOSE J-FET QUAD OPERATIONAL AMPLIFIERS

TYPICAL APPLICATIONS (continued)
POSITIVE FEEDBACK BANDPASS FILTER
TL084 - TL084A - TL084B
16k Ω
220pF
43k Ω
43k Ω
Input
-
22 0p F ^1/4
TL084
43k Ω
1.5 k Ω
30k Ω
-
1/4
TL084
43k Ω
220pF
220pF
43k Ω
-
1/4
TL084
16k Ω
43k Ω
1.5 k Ω
30k Ω
-
1/4
TL084
Output B
Output A
Ground
OUTPUT A
OUTPUT B
SECOND ORDER BANDPASS FILTER
fo = 100kHz; Q = 30; Gain = 4
CASCADED BANDPASS FILTER
fo = 100kHz; Q = 69; Gain = 16
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