Andreas Roithmeier Email & Phone Number

Germany

Munich Area, Germany

RF circuit design for key building blocks used in 2G/3G/LTE/5G RF transceivers.This are building blocks like DCO (digital controlled RF oscillators) and CDAC (capacitor based direct up conversion mixer on a DAC based architecture).As the lead of circuit design building blocks beside the originate block specific design task,also many x-functional task play a major rule in doing this high end circuits.This begins with close collaboration with concept to define block level specification, work out with device modelling groups proper RF device specify simulation models, support physical design team to transfer your circuit schematic solution in a RF competitively layout solution and final bring your circuit to a high volume solution by deep circuit eval evaluation in measurement lab.To mange all this various requirements a broad understand of circuit design, transforming 3GPP specification into block level requirements, understanding of physical design and device modelling is needed.

Munich Area, Germany

RF circuit design for cellular transceivers.LNA+MIXER and also LO signal distribution across the transceiver.Later design first fully integrated RF oscillator design (VCO).Design of the first digital controlled oscillator (DCO) used in a novel polar transmitter architecture.Beside this high performance RF device models for varaktors and CMOS RF transistors worked outwith the device modelling group