SLOS081G − FEBRUARY 1977 − REVISED SEPTEMBER 2004
TL081, TL081A, TL081B, TL082, TL082A, TL082B
TL084, TL084A, TL084B
JFET INPUT OPERATIONAL AMPLIFIERS
APPLICATION INFORMATION
16 kΩ
220 pF
43 kΩ
VCC +
−
1/4
TL084
16 kΩ
220 pF
30 kΩ
43 kΩ
VCC +
VCC +
1/4
TL084
30 kΩ
43 kΩ
Input
220 pF
VCC +
43 kΩ
1/4
TL084
220 pF
43 kΩ
1.5 kΩ
VCC −
1.5 kΩ
VCC −
VCC −
Output A
Output A
Output B
2 kHz/div
Second-Order Bandpass Filter
fo = 100 kHz, Q = 30, GAIN = 4
2 kHz/div
Cascaded Bandpass Filter
fo = 100 kHz, Q = 69, GAIN = 16
Figure 27. Positive-Feedback Bandpass Filter
16
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
−
+
−
1/4
TL084
+
+
−
43 kΩ
Output
B
+
VCC −