Mobile Large-Signal RF Circuits: Design Perspective

This presentation first motivates the topic of power amplifier and VCO with large-signal amplitude for mobile communication and radar in mobile devices. These circuits need to be highly integrated and operate the transistor close to their breakdown voltages. On the one hand, typical power amplifiers operate with large current and voltage amplitude in order to generate a sufficient output power with high efficiency. On the other hand, oscillator circuits (eg VCOs) need to operate with a large voltage amplitude and short current pulses in order to achieve excellent phase noise performance. Nevertheless, all these circuits need to operate reliably for a long time and over a wide temperature range. In order to operate close to the reliability limits, the concrete dynamic transistor operation of circuit examples up to the mm-wave region will be discussed in detail.