Electronics - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - General Questions (Q.No. 17)
17.
If a noninverting amplifier has an RIN of 1000 ohms and an RFB of 2.5 kilohms, what is the RIN voltage when 1.42 mV is applied to the correct input?
Discussion:
16 comments Page 2 of 2.
Vicky said:
1 decade ago
I think mahesh and bhoopendra is right. Thanks friends.
Mahesh said:
1 decade ago
Other end is grounded so due to virtual ground concept the voltage at non inverting pin will be zero so drop will be across 1kohm.
Vishal said:
1 decade ago
Ashok how will be vtg 1.42mA ?
Bhoopendra said:
1 decade ago
Negative terminal of op amp is at virtual ground therefore at this point the voltage will be equal to applied voltage at positive terminal.
Ashok said:
1 decade ago
r in=1000:
i=v/r:
v=1.42mA
so i=1.42A
i=v/r:
v=1.42mA
so i=1.42A
Christie said:
1 decade ago
how to solve this problem?...
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