CA3140AS INTERSIL [Intersil Corporation], CA3140AS Datasheet - Page 10

• Manufacturer Part Number: CA3140AS
• Description: 4.5MHz, BiMOS Operational Amplifier with MOSFET Input/Bipolar Output
• Manufacturer: INTERSIL [Intersil Corporation]

Three tone test signals, highest frequency 0.5MHz. Note the slight
asymmetry at the three second/cycle signal. This asymmetry is due to
slightly different positive and negative integration from the CA3080A
and from the PC board and component leakages at the 100pA level.
FIGURE 10C. FUNCTION GENERATOR WITH FIXED
Bottom Trace: Output of “Log” generator; 10V/Div., 500ms/Div.
Center Trace: External output of triangular function generator;
FIGURE 10B. FIGURE FUNCTION GENERATOR SWEEPING
SYMMETRY
Top Trace: Output at junction of 2.7 and 51 resistors;
FROM BUFFER METER
DRIVER (OPTIONAL)
FREQUENCIES
-15V
5V/Div., 500ms/Div.
2V/Div., 500ms/Div.
THIS NETWORK IS USED WHEN THE
OPTIONAL BUFFER CIRCUIT IS NOT USED
360
360
2M
100k
-15V
7.5k
+15V
3
2
1V/Div., 1s/Div.
39k
CA3080A
+
-
10
5
+15V
-15V
120
7
4
7-60
pF
6
10k
SHAPE
FREQ.
HIGH
15k
+15V
FIGURE 10. FUNCTION GENERATOR
FREQUENCY
ADJUSTMENT
pF
51
CA3140, CA3140A
FIGURE 10A. CIRCUIT
3
2
2k
-15V
AMPLIFIER
CA3140
+
-
+15V
OUTPUT
7
4
5.1k
0.1
0.1
F
F
6
ADJUSTMENT
FREQUENCY
TO
SINE WAVE
SHAPER
HIGH
FREQUENCY
LEVEL
10k
7-60pF
RATE
FINE
11k
EXTERNAL
COARSE
OUTPUT
RATE
11k
FIGURE 10D. INTERCONNECTIONS
-15V
910k
METER DRIVER
GENERATOR
CENTERING
AND BUFFER
GENERATOR
SINE WAVE
AMPLIFIER
FUNCTION
SWEEP
10k
SHAPER
62k
2
3
13k
CA3080
+
OFF
-
5
V-
SWEEP
GATE
M
7
4
INT.
V-
SWEEP
LENGTH
+15V
-15V
EXT.
DC LEVEL
6
ADJUST
SUPPLY 15V
1N914
POWER
EXTERNAL
INPUT
10k
2.7k
TO OUTPUT
AMPLIFIER
WIDEBAND
LINE DRIVER
EXTERNAL
OUTPUT
51
+15V
-15V