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X9400_15 Datasheet, PDF (17/20 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometers | |||
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Application Circuits (continued)
Attenuator
R1
R2
â
VS
+
VO
R3
R4 All RS = 10kï
VO = G VS
-1/2 ï£ G ï£ +1/2
X9400
Filter
C
VS
+
â
VO
R
R2
R1
GO = 1 + R2/R1
fc = 1/(2ï°RC)
Inverting Amplifier
R1 R2
VS
â
+
VO
VO = G VS
G = - R2/R1
Equivalent L-R Circuit
C1
VS
ZIN
R2
+
â
R1
R3
ZIN = R2 + s R2 (R1 + R3) C1 = R2 + s Leq
(R1 + R3) >> R2
Function Generator
C
â
R2
R1
â
+
} RA
+
} RB
frequency ïµ R1, R2, C
amplitude ïµ RA, RB
17
FN8189.4
September 2, 2015
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