RC4200 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RC4200

Analog Multiplier

Fairchild Semiconductor 

RC4200

Square Root Circuit Offset Adjust

+V REF

PRODUCT SPECIFICATION

R1

VX

(Input)

+VS

XOS R5

+VS

-VS

YOS

R17 = Rb

R14

R15

R16

-VS

Ra

Rb

Rc

8

5

I1

I4

R6

R8

7

RC4200

Multiplier

R7

1

0.1 µ F I2

4

2

R9

0.1 µ F

3

6 I3

-VS

Rd

R4

RO

VO

+VS

(Output)

Rao

R14-R17 can be used in place of R9 to help

reduce linearity error due to resistor product

mis-match (See Appendix 1).

0.1 µF

-VS

R10

R12

+VS

R13 V OS

R11

-VS

65-1876

Figure 9. Square Root Circuit Offset Adjust

10K ≤ R5 = R13 ≤ 50K

R7 = 100Ω

R6

=

R7

--V-----S--

0.05

R8 = R1 || Ra || Rao

R9 = Rb

R10 = R0 || RC

R11 = 100Ω

R12

=

R11

-V----S-

0.1

Procedure

1. Set both trimmer pots to 0V on the wiper.

2. Put in a full scale (0 to VX(max.) squarewave on VX

input. Adjust XOS(R5) for proper peak-to-peak ampli-

tude on V0 output. (Scaling adjust)

3. Connect VX input to ground. Adjust VOS(R13) for 0V

on V0 output.

10

REV. 1.2.1 6/14/01

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