Qualcomm interview questions

I just finished the phone interview today, and may not be given on-site because this job actually requires years of working experience. The interviewer is very nice and questions are very clear and give me hints. And finally after the interview, he even suggested some more suitable positions.

Phone interview with one senior engineer and the hiring manager: Senior engineer asked me the following questions: 1. How does the drain current of NMOS transistor vary with temperature change? 2. How does the gain of CS-Amplifer change with the temperature variation? 3. Basic design procedure of power amplifer? 4. Phase noise definition. 5. What cause phase noise of oscillator and PLL? Hiring manager: 1. Cutoff frequency definition, how to calculate it of CMOS transistor, how to increase and decrease it? 2. Relationship between transconductance and width of transistor/ 3. Input impedance value of CS-Amplifer with source degenerated resistor, inductor or capacitor? 4. Operational Transconductance Amplifer: How does the gain change with drain current change? Some questions on my resume.