rc4200 Fairchild Semiconductor, rc4200 Datasheet - Page 17

• Manufacturer Part Number: rc4200
• Description: Analog Multiplier
• Manufacturer: Fairchild Semiconductor

PRODUCT SPECIFICATION
The maximum and minimum values for I
For a dynamic range of N, where
These equations combine to yield:
REV. 1.2.1 6/14/01
I
N
R
I
I
I
2
R
1
A
1
2
(min.)
a
(min.)
V
1
(max.)
(max.)
SIN
=
Y
=
=
V
=
A max.
-------------------- -
A min.
M
ω t
A(min.)
------------------ - and R
-------------------------------- - , R2
(
(
(
50µA
5 N
=
V
=
–
=
=
X
V
----------------------- -
V
----------------------- -
(max.)
V
------------------------ -
A max.
-------------------- -
)
)
H
)50µA
H
X
(
<
(
R
(
R
30K
R
min.
10K
R3
(
min.
R
+V
10K
+V
5,
a
max.
a
2
1
S
S
-V
-V
)
)
)
O
S
S
)
+
=
=
= K
+
V
------------------------ -
30K
R3
50µA
30K
V
------------------------ -
50µA V
-------------------------------- - ,
(
H
30K
5 N
H
(
R
------------ -,
R2
R
A(max.)
–
max.
R1
(
R
R
R1
1
a
max.
R
a
a
)50µA
2
RC4156
)
M
1N914
R1 R
100
100
30K
)
1/4
(
R3
=
R2 R
min.
=
Figure 16. Amplitude Modulator with A.G.C.
R
250µA
R2
1
a
a
250µA
1N914
and I
)
a
=
R
a
0
2
0.1 F
0.1 F
lead to:
µ
µ
8
1
7
2
1/2 R3
-V
15K
Multiplier
RC4200
S
3
6
Example 1
V
0V ≤ V
K = 1, therefore V
Example 2
V
0V ≤ V
K = 0.2, therefore V
so:
R
R
R
R
R
R
1
a
Y
Y
4
5
1
1
a
O
= 60K and R
= 53.3K, R
= Asinωt 2.5V ≤ A ≤ 10V, therefore N = 4
= Asinωt 3 ≤ A ≤ 6, therefore N = 2
=
RC4156
=
=
R
=
a
1/4
A(min.)
------------------ -
V
----------------------- -
A(max.)
------------------- -
M
M
2
p
K
50µA
50µA
C1
X
50µA
R
------------ -
≤ 10V, therefore V
≤ 8V, therefore V
R3 47K
(max.)
R
1
R
a
R
2
2
a
0
=
= 40K
=
R
=
0.1 F
= 7.11K
0
O
=
V =
------------- -
50µA
1
2.5V
------------- -
50µA
= V
0
H
470
10V
µ
200K 200K
-------------------------------- -
------------- -
50µA
10V
= 0.2 V
M
p
2
*R1
50K
AVG A sin
sinωt
=
R*
=
×
X
X
=
(max.) = 8V
RC4156
50K
M
200K
(max.) = 10V
30K
R2
200K
1/4
sinwt
R
ω t
=
a
+V
-V
800K
= A
S
R
10K
S
O
65-1866
V sin
M
V =
O
RC4200
ω t
17