A Broadband Current Sensor based on the XHall Architecture A broadband current sensor, which is fully integrated and galvanicallyisolated, is presented in this paper. The current sensor relies only on a Halleffect probe to realize the magnetic sensing core so as to minimize the cost and the occupied space. Bandwidth limitations of stateoftheart Halleffect probes are overcame by combining the novel XHall architecture with a wide bandwidth differentialdifference currentfeedback amplifier. A prototype implemented in  0.16mumathrmm  BCD technology demonstrates a bandwidth wider than 20 MHz. Offset, sensitivity and power consumption are comparable to the state of the art. This is the first Hallonly current sensor achieving a bandwidth higher than 3 MHz.

FullySynthesizable CurrentInput ADCs for UltraLow Area and Minimal Design Effort A fully synthesizable ADC architecture is proposed for lowend current sensing applications. Being based on standard cells and designed with a fullyautomated flow, the proposed ADC allows very low area, digitallike scaling across CMOS technology generations, technology and design portability, minimal design effort, and immersedin logic design (i.e., low integration effort), compared to traditional analogintensive designs. In addition, it allows direct current readout without requiring a transresistance stage. Testchip measurements show a 5nA to  1boldsymbolmu mathbfA  input range, 6.7bit ENOB and 2.2kSs sample rate, at 940nW power and  4,580boldsymbolmu mathbfm2  area. To the best of the authorsu0027 knowledge, this testchip is the first demonstration of a fullysynthesizable inputcurrent ADC. Along with the analysis of the specific limitations of the presented demonstration, this work aims to pave the way for a new class of currentinput ADCs that can be designed and integrated with logic within hours, and occupy a silicon area in the order of 10kgates.