New challenge is here! It's AQQ259 related to a tunable or adjustable amplifier:
The above circuit is a tunable or adjustable gain amplifier. The opamp used is
considered as ideal (i.e. infinite open loop gain, infinite input resistance and
zero output impedance).
Questions:
1. For given R1, R2 and P, at which wiper position α, Vout = 0 volt?
2. Versus Vin, what is the dynamic range of Vout?
Good luck! And try to be among the first ones!
P.S. Don't hesitate to spread those weekly quizzes to colleagues or friends (we need more participants)!
The amplifier has the same voltage applied to the inverting and non-inverting inputs.
Superposition gives the following:
