In this thesis we will walk you through the design choices we made in designing a battery management system (BMS) for the Zebro robot. This specific BMS is designed as a subcomponent of an autonomous charging system. The main goal of this BMS is to safely charge and discharge the systems battery, while providing the system with relevant data on the battery status. The BMS consists of multiple subsystems, the most important being a charger, a cell balancer, a power management system and a main control unit tying it all togheter.

N-path filters promise to miniaturize RF receivers by replacing various fixed off-chip filters with a single programmable on-chip filter. This research investigates some of the issues of receivers with N-path filters under strong blocker conditions: reciprocal mixing and inherent nonlinearity. First, a technique for reciprocal mixing cancellation is explored and shown to be impossible using only mixers and baseband impedances. Second, the inherent nonlinearity of both bandpass and notch N-path filters are simulated and modelled. To validate this approach, a highly linear receiver is proposed and designed in 40nm CMOS. The receiver has a bandpass common gate architecture, with a notch filter in the feedback path, improving linearity. The filter is isolated using buffers, improving LO leakage. The common gate stage is IM3 compensated to obtain good
linearity (OOB IIP3 >20 dBm).