HA1-2556883 Intersil Corporation, HA1-2556883 Datasheet - Page 17

• Manufacturer Part Number: HA1-2556883
• Description: Wideband Four Quadrant Analog Multiplier (Voltage Output)
• Manufacturer: Intersil Corporation

DESIGN INFORMATION
The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as
application and design information only. No guarantee is implied.
Well, OK a multiplier can’t do nonintegral roots “exactly” but
we can get very close. We can approximate nonintegral
roots with equations of the form:
Figure 18 compares the function V
approximation V
This function can be easily built using an HA-2556 and a
potentiometer for easy adjustment as shown in Figures 19
and 20. If a fixed nonintegral power is desired, the circuit
shown in Figure 21 eliminates the need for the output buffer
amp. These circuits approximate the function V
is the desired nonintegral power or root.
FIGURE 18. COMPARE APPROXIMATION TO NONINTEGRAL
0V
0.5
0.8
0.6
0.4
0.2
FIGURE 19. NONINTEGRAL ROOTS - ADJUSTABLE
1
0
0
V
M
IN
1.0
1V
ROOT
V
V
o
OUT
NC
NC
NC
o
-V
0.2
=
=
1
2
3
4
5
6
7
8
= 0.5V
+
-
1
X
REF
1
Y
HA-2556
–
–
0.4
IN
INPUT (V)
0.5
+
X
-
V
0.7
V
+ 0.5V
X
IN
Z
1 2
IN
2
0.5X
+
+
-
-
16
15
14
13
12
11
10
9
+
0.6
+
-
+
0.5
OUT
IN
NC
NC
NC
HA-5127
+V
+ 0.5X
.
V
V
IN
IN
= V
(Continued)
0.8
M
IN
IN
0.7
1-
where M
V
OUT
to the
V
IN
HA2556
1
8-23
Setting:
1
V
V
–
OUT
OUT
0V
1.0
FIGURE 20. NONINTEGRAL POWERS - ADJUSTABLE
0V
1.2
=
V
FIGURE 21. NONINTEGRAL POWERS - FIXED
M
IN
V
=
M
IN
1
- -
5
2.0
1V
1
- -
5
NC
NC
NC
-V
2.0
1V
R3
---- -
R4
R3
---- -
R4
1
2
3
4
5
6
7
8
+
NC
NC
NC
-V
+
-
+
1
REF
Y
1
HA-2556
1
2
3
4
5
6
7
8
+
-
V
REF
+
Y
IN
2
HA-2556
-
R3
X
Z
+
+
+
+
-
-
Spec Number
-
16
15
14
13
12
11
10
9
=
R3
---- -
R4
X
Z
NC
NC
NC
+V
+
+
-
-
+
16
15
14
13
12
11
10
9
R3
---- -
R4
+
-
1
R4
HA-5127
NC
NC
NC
+V
+
---------------- -
R1
1
1-
R2
V
+
511063-883
IN
---------------- -
R1
R2
R2
V
V
R1
R2
+
OUT
IN
V
R2
IN