X9119 Datasheet, PDF(17/18 Page) Xilinx, Inc – Single Digitally-Controlled (XDCP ™ ) Potentiometer

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X9119 Datasheet, PDF (17/18 Pages) Xilinx, Inc – Single Digitally-Controlled (XDCP ™ ) Potentiometer

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Application Circuits (Continued)

X9119

Attenuator

R4 R1 = R2 = R3 = R4 = 10kâ¦

Filter

VO = G VS

-1/2 â¤ G â¤ +1/2

GO = 1 + R2/R1

fc = 1/(2ÏRC)

Inverting Amplifier

R1 R2

VO = G VS

G = - R2/R1

Equivalent L-R Circuit

ZIN

Function Generator

ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq

(R1 + R3) >> R2

} RA

} RB

frequency â R1, R2, C

amplitude â RA, RB

FN8162.2

September 15, 2005

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