Datasheet

   
    
SLOS051E − OCTOBER 1987 − REVISED AUGUST 2008
31
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
−
+
R2
68 kΩ
2.2 nF
C2
V
O
1N4148
470 kΩ
100 kΩ
C1
2.2 nF
68 kΩ
R1
47 kΩ
100 kΩ
1 µF
100 kΩ
5 V
1/2
TLC27M2
NOTES: V
O(PP)
≈ 2 V
f
O
+
1
2p R1R2C1C2
Ǹ
Figure 44. Wien Oscillator
Figure 45. Precision Low-Current Sink
V
I
R
5 V
I
S
2N3821
−
+
1/2
TLC27M7
NOTES: V
I
= 0 V to 3 V
I
S
+
V
I
R
(see Note A)
−
+
100 kΩ
+−
100 kΩ
100 kΩ
Gain Control
1 MΩ
1 kΩ
10 kΩ
5 V
1µ F
− +
− +
0.1 µF
1/2
TLC27M2
0.1 µF
NOTE A: Low to medium impedance dynamic mike
Figure 46. Microphone Preamplifier