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For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.
Assume (Rf≫ R). R = 0.5 kΩ
- a)1.2 M Ω
- b)1.6 k Ω
- c)1.6 M Ω
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
For the opamp biasing shown in figure, it was found experimentally ev...
Assuming ideal op-amp and Rf≫ R current can be modelled as voltage source
I+ = current at positive non-inverting terminal
I- = current at the negative inverting terminal
Vo+ = output voltage due to non-inverting current flow
Vo- = output voltage due to non-inverting current flow
(Taking inverting node ground)
= I+R + I+Rf
Vo− = I−R(−Rf/R)
V0 (offset) = V0+ + V0− (By superposition theorem)
= I+R + I+Rf − I−Rf
= I+R + Rf(l+ − I−)
8mV = 15 × 0.5 × 10−16 + Rf(15 − 10) × 10−9
(8×10−3−7.5×10−6)/5×10−9 = Rf
Rf ≈ 1.6 M Ω
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For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer?
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For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer?.
For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the opamp biasing shown in figure, it was found experimentally even at zero bias the current flowing into positive terminal is 15nA and current flowing into negative terminal is 10nA. If the output voltage of op-amp is 8mV. The value of feedback resistance Rf is__________.Assume (Rf≫ R). R = 0.5 kΩa)1.2 M Ωb)1.6 k Ωc)1.6 M Ωd)None of theseCorrect answer is option 'C'. Can you explain this answer?.
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