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| X9252 Datasheet, PDF (17/19 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) potentiometer | |||
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Application Circuits (Continued)
ATTENUATOR
R1
R2
-
VO
VS
+
R3
R4
R1 = R2 = R3 = R4 = 10kâ¦
VO = G VS
-1/2 ⤠G ⤠+1/2
X9252
VS
FILTER
C
+
-
VO
R
R2
R1
GO = 1 + R2/R1
fc = 1/(2ÏRC)
INVERTING AMPLIFIER
R1
R2
VS
-
VO
+
VO = G VS
G = - R2/R1
FUNCTION GENERATOR
-
R2
+
} RA
} RB
frequency â R1, R2, C
amplitude â RA, RB
EQUIVALENT L-R CIRCUIT
C1
VS
ZIN
R2
+
-
R1
R3
ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq
(R1 + R3) >> R2
C
R1
-
+
17
FN8167.1
September 14, 2005
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