X9119
Application Circuits (Continued)
ATTENUATOR
FILTER
C
V
+
–
S
R
V
R
R
2
O
1
3
–
+
R
V
O
V
S
R
2
R
4
R
= R = R = R = 10kΩ
1
2
3
4
R
1
G
= 1 + R /R
2 1
O
V
= G V
S
O
fc = 1/(2pRC)
-1/2 £ G £ +1/2
INVERTING AMPLIFIER
EQUIVALENT L-R CIRCUIT
R
R
2
1
V
S
R
2
C
1
–
+
V
+
–
S
V
O
R
R
1
3
Z
IN
V
= G V
S
O
G = - R /R
2
1
Z
= R + s R (R + R ) C = R + s Leq
2 2 1 3 1 2
IN
(R + R ) >> R
1
3
2
FUNCTION GENERATOR
C
R
R
1
2
–
+
–
+
R
R
}
}
A
B
FREQUENCY µ R , R , C
1
2
AMPLITUDE µ R , R
A
B
FN8162.4
July 9, 2008
16