A 17 dBm 64 GHz voltage controlled oscillator with power amplifier in a 0.13 μm SiGe BiCMOS technologyBrian WelchUllrich Pfeiffer2006RFIC 2006
Equivalent circuit model extraction of flip-chip ball interconnects based on direct probing techniquesUllrich PfeifferBrian Welch2005IEEE MWCL