Mostly questions about your experience, and they'll ask details about the specific circuits you're working on. I worked on clocking, so they asked about CDR bandwidth, how PI works, how to do multiphase gen. Also, some basic questions like differential pair, opamps and common mode operation.
Draw a low pass filter. What is the transfer function? Draw the Bode plots.
Analog design basics, from Razavi Book
What and where are the poles for a given op-amp?
Analize and discuss a fully differential OTA.
OTA design, Switch capacitor circuits
Opamp Operation Mosfet fundatmentals Gain,Phase, offset of opamp
Basic RC circuit questions Frequency response, low pass filters
Technical and leadership questions to show the technical knowledge and the soft skills
Amplifier design/specs
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