TL071C,AC TL072C,AC TL074C,AC
Representative Schematic Diagram
(Each Amplifier)
Output
Bias Circuitry
Common to All
Amplifiers
VCC
Q3
Q4
Q5
Q2
Q1
Q6
–
Inputs
+
J1
J2
2.0 k
Q17
Q20
Q15
10 pF
Q14
Q21
Q12
Q10
Q13
Q11
Q16
Q9
Q8
Q7
Q18
Offset
Null
(TL071
only)
1.5 k
1.5 k
VEE
Q25
Q22
Q24
Q19
Q23
24
J3
Figure 14. Audio Tone Control Amplifier
Input
10 k
100 k
10 k
0.033
µF
0.033
µF
10 k
VCC
–
TL071
+
68 k
Output
3.3 k
0.033
µF
100 k
0.033
µF
VEE
Turn–Over Frequency = 1.0 kHz
Bass Boost/Cut —
±20
dB at 20 Hz
Treble Boost/Cut —
±19
dB at 20 kHz
Figure 15. High Q Notch Filter
R
Input
R
C1
–
TL071
+
R1
C
C
+
2
p
1RC
+
350 Hz
R
+
2R1
+
1.5 M
C
+
C1
+
300 pF
2
fo
6
MOTOROLA ANALOG IC DEVICE DATA