CA3060 データシートの表示（PDF） - Intersil
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CA3060 Datasheet PDF : 12 Pages
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CA3060
X
INPUT
Y
INPUT
-
AMP
+1
IO(1)
IABC (1) R1
+
-
AMP
2
VO
RL
IO(2)
R2
IABC (2)
RF
RIN -
+
AMP
3
FIGURE 27. FOUR QUADRANT MULTIPLIER
Figure 28 shows the actual circuit including all the adjust-
ments associated with differential input and an adjustment
for equalizing the gains of Amplifiers 1 and 2. Adjustment of
the circuit is quite simple. With both the X and Y voltages at
zero, connect Terminal 10 to Terminal 8. This procedure
disables Amplifier 2 and permits adjusting the offset voltage
of Amplifier 1 to zero by means of the 100kΩ potentiometer.
Next, remove the short between Terminal 10 and 8 and
connect Terminal 15 to Terminal 8. This step disables
Amplifier 1 and permits Amplifier 2 to be zeroed with the
other potentiometer. With AC signals on both the X and Y
inputs, R3 and R11 are adjusted for symmetrical output
signals. Figure 29 shows the output waveform with the
multiplier adjusted. The voltage waveform in Figure 29A
shows suppressed carrier modulation of 1kHz carrier with a
triangular wave.
Figures 29B and 29C, respectively, show the squaring of a
triangular wave and a sine wave. Notice that in both cases
the output is always positive and returns to zero after each
cycle.
X
INPUT 1MΩ
1MΩ
270Ω
13
270Ω
100Ω
Y
INPUT 51kΩ
4
100Ω
5
0.02µF
24kΩ
CA3060
AMP
1
AMP
3
1.1MΩ
10
11
12
AMP
2
270Ω
16
1MΩ
15
OUTPUT
1MΩ
14
200kΩ
4
51
kΩ
7
240kΩ
6
3
270Ω
560kΩ
V+ 100kΩ V-
100kΩ
9
560kΩ
8
FIGURE 28. TYPICAL FOUR QUADRANT MULTIPLIER CIRCUIT
FIGURE 29A.
FIGURE 29B.
FIGURE 29C.
FIGURE 29. VOLTAGE WAVEFORMS OF FOUR QUADRANT MULTIPLIER CIRCUIT
3-12
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