PRODUCT SPECIFICATION

RC4200

REV. 1.2.1 6/14/01

11

2

Figure 10. Squaring Circuit

65-1875

RC4200

Multiplier

V

(Input)

S

X

O

O

S

CX

R1

R

-V

R

V

(Output)

+V

S

-V

3

6

4

5

8

7

1

2

REF

+V

RC5534

R1

V

X

2

R

1

2

--------

2V

R

-------------------------

V

REF

2

R

a

2

--------------

++

V

R

---------------------

V

REF

2

R

--------------

V

R

----------------------

++

=

if R

a

2

R

2R

==

then

V

R

---------------------

V

X

2

R

1

2

-------- or V

0

KV

X

R

V

2

---------------------

==

K

V

0

V

X

2

-------- (Design Requirement)

=

R

1

∆V

X

200

µA

-----------------

=

R

a

∆V

250

µA∆V

X

200

µAV

()

–

--------------------------------------------------------------------------------

=

R

d

V

REF

250

µA

-----------------

=

R

c

R

a

2

R

d

------

=

R

cx

R

2R

d

-------------

=

R

0

160

µA

-------------------

=