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.
Dharm said:
1 decade ago
How to solve this ?
Caro said:
1 decade ago
2.5/1000+1x1.42 = 1.42.
Ajinkya said:
9 years ago
As the circuit is non-inverting, it means there is no change at the o/p voltage. That means I/p voltage = o/p voltage.
Thank you.
Thank you.
Manisha khurana said:
9 years ago
This is not virtual ground situation. Virtual ground is the case when terminal is grounded directly but here there is feedback from output.
Naeem Khattak said:
8 years ago
@Daks.
Thanks for solving the question in detail.
Thanks for solving the question in detail.
Satish kumar said:
8 years ago
Vo=Vin(1+Rf/Rin)).
Vo=1.42*10^3(1+2.5*10^3/100.0)
Vo=4.97mV.
The Voltage across Rin=Rin*Vo/Rin+Rf.
= 1.42mV.
Vo=1.42*10^3(1+2.5*10^3/100.0)
Vo=4.97mV.
The Voltage across Rin=Rin*Vo/Rin+Rf.
= 1.42mV.
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