Detailed knowledge with direct tape-out experience in several of the following a MUST: LDO, Bandgap, DC-DC Converter, various ADC/DAC architectures, OPAMP/Amplifiers, Comparators, Analog Filters, Variable Gain Amplifiers, XTAL Oscillators, Ring Oscillator, etc. Knowledge of QFN & CSP packaging effects, supply isolations, circuit layout for optimum Analog/RF performance, EM effects, PEX (post-layout parasitic extraction).