CA3193, CA3193A
Test Circuits and Waveforms (Continued)
FIGURE 3. VOLTAGE FOLLOWER
100Ω
1%
2.2MΩ
1%
2
3
100Ω
1%
+15V
7
CA3193
6
4
5
1
LOW PASS
FILTER
DC TO 10Hz
HIGH PASS
FILTER
0.1 TO 10Hz
A
3.3kΩ
1%
4.7µF
1%
B
2.2µF
1%
1MΩ
SCOPE
INPUT
RESISTANCE
20kΩ 20kΩ
1kΩ
VNOISE = V-----2O---2-U---x-T--1--P-0----–3----P-
-15V
FIGURE 4A. TEST CIRCUIT - 0.1Hz TO 10Hz
FIGURE 4B. OUTPUT A WAVEFORM - 0Hz TO 10Hz NOISE
FIGURE 4C. OUTPUT B WAVEFORM - 0.1Hz TO 10Hz NOISE
FIGURE 4. LOW FREQUENCY NOISE
Functional Block Diagram
+
3
INPUT -
2
3µA
950µA
A ≈ 2000
25K
BIAS NETWORK
70µA
A≈7
6pF
660µA
20pF
A ≈ 75
600µA
7.5K
A≈1
2.3mA
7 V+
6
OUTPUT
15
OFFSET
NULL
4
V-
63