KCC's Quizzes AQQ304 - A pure logic
1. Quote of the month: "I am not lazy, I'm just in energy-saving mode" - unknown
2. Quiz AQQ304 about finding a pure logic puzzle
Mike is looking at Anne, but Anne is looking at Paul.
Mike is married, but Paul is not.
Question:
Is a married
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September Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Quiz: How Well Do You Know Adaptive Power Switching?
Is your I/O module overheating? The AD74416H's Adaptive Power Switching (APS) can cut heat dissipation by up to 40% — but how well do you really understand how it works?
Read the blog first: Cooling
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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)!
I'm a little confused: It seems like this quiz was first released back in April 2024? Has the quiz been running until now (April 2025), or has it been restarted? Maybe I missed it in the first place?!
Looking through the first few answers, in my opinion @retireEE had a very good answer to the quiz, and there are many other really good answers as well.
By the way, did anyone mention that there is also a limit to the Vin voltage range? If the opamp is a rail-to-rail input, NI+ and IN- can be operated in the entire range between -Ecc and +Ecc, but not below or above. This puts a limit on the voltage range Vin can have.
Br Stefan
I'm a little confused: It seems like this quiz was first released back in April 2024? Has the quiz been running until now (April 2025), or has it been restarted? Maybe I missed it in the first place?!
Looking through the first few answers, in my opinion @retireEE had a very good answer to the quiz, and there are many other really good answers as well.
By the way, did anyone mention that there is also a limit to the Vin voltage range? If the opamp is a rail-to-rail input, NI+ and IN- can be operated in the entire range between -Ecc and +Ecc, but not below or above. This puts a limit on the voltage range Vin can have.
Br Stefan