Innovative Leadership Project Electrical Engineer 2014 (Analog)
Phone interview round- asking basic questions on the resume, pretty much everything, and technical: DC-DC converter component; if you want to reach certain Vout, what should you do? I first said a voltage divider, but their expected answer is a DC regulator. They also asked me about components in the DC regulator.
Invited to their headquarter Coopersburg, PA two weeks later. I was too excited to be on a first time site- interview that I did not sleep well the night before, which was bad.
They took me a tour of their lights, and ideal high-end home design.
Behavioral Interview - No hard questions. What is the most innovative thing that you have done? Does not have to be technical.
Technical
Q1: Two light bulbs connecting in series, which one would glow brighter?
ANS: Using P=VI= (I^2)R to tackle this.
Q2: A pnp transistor with its base connected to a voltage source, the V source is connected to a +10V source. The emitter of the transistor is connected to a resistance, and then to the same +10V source. The collector side is connected to a capacitor, which is not charged at t=0-.
Given the graph of Vsource = 10 V stepping up at t = 0 to further, draw the graph of Vout. Vout is between the point of collector and capacitor.
ANS: Vout should be constantly -10V until t=0, and will hit V=0 V linearly from V=-10 V after t=0.
This question is exactly the same as one person had almost a year ago. I really hope that I looked into more of his question before I went to the interview. I took quite an amount of help from the interviewer to solve Q2.
Overall, having a good night sleep is very important before any interview. I have not heard back from them, but I think that it is great to share my experience with others.