View All num of num See all Photos Qualcomm www.qualcomm.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 2.0k Reviews 12k Salaries 1.1k Interviews Follow Add Review or Salary Follow Add Review or Salary Interview Question Mixed Signal Test Bench Engineer ( Mainly ADC) Interview San Diego, CA Qualcomm Its an ADC Testing Day - Every interview was like go in to the room , they asked me to go to the board , and started questioning. But it was nice experience , it was question to answer interviews. 1)Draw Frequency Spectrum of output of an ADC , when the ADC is undersampled . Say f(in) = 10 MHz and Fs= 7 MHz. 2)Square wave in frequency domain will have odd or even harmonics ? 3) Every interviewer asked about how to test the static and dymanic parameters of an ADC, like DNL,SNDR, SNR (ideal). , Histogram Techniques , Coherent Sampling , Windowing, Ramp input vs Sine wave input testing 4)Basics on dB,dBm andfind rms power output. Given an input signal. 5)RC filter output wave amp and phase vs freq plots., transfer function of high pass filter 6)Some C programming questions. - String reversal, sorting, find max number, find prime number. 7)Some questions based on resume. ( projects ,very few) 8)Testing a DAC 9)Transmission Line - Impedence matching questions. Director asked me one question on how would I like to see myself in 5 years from now. Tags: qualcomm adc testing interview. See more , See less 8 Answer Add Tags Answer Interview Answer 2 Answers ▲ 1 ▼ Answer for question 1 - We hav an alias at 3 MHz (fin - fs) and fundamental signal power(Vin/(1.414) at 10 MHz. Interview Candidate on Jan 7, 2013 ▲ 1 ▼ Square wave in frequency domain will have odd or even harmonics ?odd, as 3f, 5f,7f (f is the frequency of the square wave) newsan on Mar 8, 2013 Interviews > Mixed Signal Test Bench Engineer ( Mainly ADC) > Qualcomm Add Answers or Comments To comment on this, Sign In or Sign Up.