View All num of num See all Photos Qualcomm www.qualcomm.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 2.2k Reviews 12k Salaries 1.2k Interviews Follow Add Interview Follow Add Interview Interview Question Analog & Mixed-Signal IC Design Engineer Interview San Diego, CA Qualcomm How to make sure the 2-stage opamp is stable? How does the compensation work? Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 5 Answers ▲ 8 ▼ Use compensation capacitor. Look up pole splitting which uses Miller effect on the capacitor. Interview Candidate on Jun 26, 2012 ▲ 0 ▼ By constructing current mirror circuit using op-amp 741 through compensation resistor at the feedback side. Finally the input and output of the op-amp gets compensated. sowndharya k on Jun 29, 2012 ▲ 1 ▼ Using Miller compensation. A compensation capacitor across the 2nd stage to create pole splitting. A series resistor to the cap might be needed to solve the rhp zero problem Karthik Tripurari on Jul 31, 2013 ▲ 0 ▼ Using compensation capacitor, which makes the low frequency pole's frequency become lower and high frequency pole's frequency higher, so OPmap is more stable. Anonymous on Nov 26, 2014 ▲ 0 ▼ Using compensation network including capacitor and resistor and monitoring the phase margin and gain margin as well. Anonymous on Jan 11, 2015 Interviews > Analog & Mixed-Signal IC Design Engineer > Qualcomm Add Answers or Comments To comment on this, Sign In or Sign Up.