Operational Amplifiers
Q1:
 The input impedance is ______ for the amplifier in the given circuit. The data sheet values are Zin = 3 M , Zout = 80 , and Aol = 250,000.A 4.7 k
B 22.7 k
C 3 M
D 68.6 k
ANS:A - 4.7 k The differential input impedance of the operational amplifier is defined as the impedance between its two inputs; the common-mode input impedance is the impedance from each input to ground. (from wiki) Share : |
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