RC4200
PRODUCT SPECIFICATION
12
Squaring Circuits Offset Adjust
Figure 11. Squaring Circuit Offset Adjust
65-1874
RC4200
Multiplier
S
O
O
S
R
1
-V
I
3
R
V
+V
S
-V
3
6
4
5
8
7
1
2
I
2
I
1
I
4
R
c
V
(Input)
R
d
S
+V
S
-V
R
10
Z
OS
+V
REF
R
9
100 R
d
R
8
R
7
=
(Output)
R
15
0.1 F
R
CX
R
1
R
5
R
a
R
b
R
6
m
0.1 F
m
0.1 F
R7-R10 can be used to cancel all
linearity errors caused by input
offsets and resistor product
mis-match (See Appendix 1).
R
16
S
+V
S
-V
V R
13
R
14
Procedure
1.
1.Set both trimmer pots to 0V on the wiper.
2.
2.Put in a full scale (
±
V
X
) squarewave on V
X
input.
Adjust Z
OS
(R10) for uniform output.
3.
3.Connect V
X
input to ground. Adjust V
OS
(R
11
) for 0V
on V
0
outputs.
10K
R
10
£
R
11
50K
£
=
R
8
, R
15
100
W
=
R
9
, R
14
100
W
V
S
0.1
------
=
R
5
, R
6
R
1
R
a
||
=
R
16
R
0
R
c
R
a
||
||
=