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| X9252_14 Datasheet, PDF (17/19 Pages) Intersil Corporation – Quad Digitally-Controlled Potentiometer | |||
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Application Circuits (Continued)
R1
R2
-
VO
VS
+
R3
R4
R1 = R2 = R3 = R4 = 10kï
VO = G VS
-1/2 ï£ G ï£ +1/2
FIGURE 16. ATTENUATOR
X9252
C
VS
+
-
VO
R
GO = 1 + R2/R1
fc = 1/(2ï°RC)
R2
R1
FIGURE 17. FILTER
R1
R2
VS
-
VO
+
VO = G VS
G = - R2/R1
FIGURE 18. INVERTING AMPLIFIER
C1
VS
ZIN
R2
+
-
R1
R3
ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq
(R1 + R3) >> R2
FIGURE 19. EQUIVALENT L-R CIRCUIT
C
-
R2
R1
-
+
} RA
+
} RB
FREQUENCYï ïµ R1, R2, C
AMPLITUDE ïµ RA, RB
FIGURE 20. FUNCTION GENERATOR
Submit Document Feedback 17
FN8167.3
July 24, 2014
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