Datasheet

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+
-
+
-
88.4 kΩ
18 pF
V
CC+
V
CC-
18 pF
18 pF
88.4 kΩ
88.4 kΩ
1N4148
1N4148
V
CC-
V
CC+
1 kΩ
- 15 V
6 cos ωt
15 V
18 kΩ
(see Note A)
1 kΩ
6 sin ωt
1/2
TL082
1/2
TL082
18 kΩ
(see Note A)
Output BOutput A
+
-
1.5 kΩ V
CC-
43 kΩ
220 pF
43 kΩ
V
CC+
30 kΩ
V
CC+
43 kΩ
V
CC-
+
-
16 kΩ
43 kΩ
Input
220 pF 220 pF
16 kΩ
+
-
V
CC-
V
CC+
30 kΩ
V
CC+
43 kΩ
220 pF
43 kΩ
V
CC-
+
-
1.5 kΩ
1/2
TL082
2 kHz/div
Second-Order Bandpass Filter
f
o
= 100 kHz, Q = 30, GAIN = 4
2 kHz/div
Cascaded Bandpass Filter
f
o
= 100 kHz, Q = 69, GAIN = 16
Output A
Output
B
1/2
TL082
1/2
TL082
1/2
TL082
TL082-Q1
JFET-INPUT OPERATIONAL AMPLIFIER
SLOS548 – SEPTEMBER 2007
A. These resistor values may be adjusted for a symmetrical output.
Figure 23. 100-kHz Quadrature Oscillator
Figure 24. Positive-Feedback Bandpass Filter
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