CA3060 Intersil, CA3060 Datasheet - Page 9

• Manufacturer Part Number: CA3060
• Description: 110kHz / Operational Transconductance Amplifier Array
• Manufacturer: Intersil

Typical Applications
Having determined the operating points of the CA3060
amplifiers, they can now function in the same manner as
conventional op amps, and thus, are well suited for most op
amp applications, including inverting and non-inverting
amplifiers, integrators, differentiators, summing amplifiers
etc.
Tri-Level Comparator
Tri-level comparator circuits are an ideal application for the
CA3060 since it contains the requisite three amplifiers. A tri-
level comparator has three adjustable limits. If either the
upper lower limit is exceeded, the appropriate output is
activated until the input signal returns to a selected
intermediate limit. Tri-level comparators are particularly
suited to many industrial control applications.
NOTES:
9. Items in dashed boxes are external to the CA3086.
V+ = 6V
INPUT SIGNAL
(E
All resistance values are in ohms.
S
)
LOWER LIMIT
UPPER LIMIT
REFERENCE
13K
REFERENCE
VOLTAGE
VOLTAGE
E
R
1K
L
2
1K
R
E
1
U
R
10K
R
10K
REFERENCE VOLTAGE
INTERMEDIATE LIMIT
5.1K
5.1K
5.1K
5.1K
5.1K
4
3
14
13
12
11
4
5
E
U
2
- E
+
+
+
CA3060
CA3060
CA3060
-
-
-
L
1/3
1/3
1/3
FIGURE 22. TRI-LEVEL COMPARATOR CIRCUIT
15
10
6
20K
1
I
I
I
ABC
ABC
ABC
16
9
REGULATOR
7
IN CA3060
EXCEEDED
10.
LIMIT IS
LOWER
EXCEEDED
WHEN
WHEN INTERMEDIATE REFERENCE
LIMIT IS EXCEEDED
2
RESET
SET
LIMIT IS
UPPER
3
WHEN
25K
SET
CA3060
E
E
V+ = 6V
V- = -6V
S
L
8
3-9
E
E
U
U
Circuit Description
Figure 23 shows the block diagram of a tri-level comparator
using the CA3060. Two of the three amplifiers are used to
compare the input signal with the upper limit and lower limit
reference voltages. The third amplifier is used to compare
the input signal with a selected value of intermediate limit
reference voltage. By appropriate selection of resistance
ratios this intermediate limit may be set to any voltage
between the upper limit and lower limit values. The output of
the upper limit and lower limit comparator sets the corre-
sponding upper or lower limit flip-flop. The activated flip-flop
retains its state until the third comparator (intermediate limit)
in the CA3060 initiates a reset function, thereby indicating
that the signal voltage has returned to the intermediate limit
selected. The flip-flops employ two CA3086 transistor array
ICs, with circuitry to provide separate “SET” and “POSITIVE
OUTPUT” terminals.
=
=
LOWER LIMIT
UPPER LIMIT
11
10
Q
Q
CA3086
CA3086
FLIP-FLOP
FLIP-FLOP
2
1
(ON), Q
(ON), Q
9
11
1
2
(OFF)
(OFF)
10
9
150K
4
4
5.1K
E
4.7K
10K
S
V+ = 6V
V+ = 6V
5
5
E U
------------------- -
3
3
2
–
E L
1
1
4.7K
10K
=
SATURATES WHEN
SATURATES WHEN
LOAD
LOAD
13
12
LOWER LIMIT IS
UPPER LIMIT IS
Q
2
2
1
EXCEEDED
EXCEEDED
(OFF), Q
6
14
5.1K
150K
100
6
100
12
2
(OFF)
8
7
8
7
14
13
Q
Q
1
2