Mixed Signal Interview Questions

278 mixed signal interview questions shared by candidates

What is MDAC gain in 2.5bit-per-stage in pipelined ADC? I understood the answer after the interview... In the continuous-time sigma-delta modulator, can the gain-boosting amplifier be designed with a lower bandwidth? This is really hard to understand for new college grads if you don't have experience in designing that... Why is the intrinsic gain of BJT is higher than that of MOSFET? You need to review that the p-substrate in NMOS is lightly doped and and therefore more sensitive to reverse bias, and this is also where channel length modulation comes into the picture. Some of the circuit problems are really novel and I have to come up with new techniques to analyze it.
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Mixed Signal Design Engineer

Interviewed at NVIDIA

4.4
Jan 29, 2015

What is MDAC gain in 2.5bit-per-stage in pipelined ADC? I understood the answer after the interview... In the continuous-time sigma-delta modulator, can the gain-boosting amplifier be designed with a lower bandwidth? This is really hard to understand for new college grads if you don't have experience in designing that... Why is the intrinsic gain of BJT is higher than that of MOSFET? You need to review that the p-substrate in NMOS is lightly doped and and therefore more sensitive to reverse bias, and this is also where channel length modulation comes into the picture. Some of the circuit problems are really novel and I have to come up with new techniques to analyze it.

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