I applied through an employee referral. The process took 4 weeks. I interviewed at Qualcomm (San Diego, CA) in Oct 2013
Interview
I've had about 50 minutes' phone interview.
The interviewer gave me information about the position for 5 minutes,
and asked me to freely introduce what I've done before for 5 minutes.
Then, technical questions continued for 40 minutes.
Starting from system-level conceptual questions,
the interviewer asked about details of CMOS circuits.
Interview questions [1]
Question 1
MOS Transistor level quizzes.
About nonlinear charge injection, opamp's gain error, etc.
Basics are always important.