This report presents a CircuitVision Analysis on the Qualcomm QET4100 envelope tracker. The Qualcomm QET4100 envelope tracker die consists of boost regulators, linear regulator, average power tracking, envelope tracking and biasing circuitry block. This report includes a full set of hierarchal schematics and annotated photos and X-rays for the envelope tracker integrated
circuit (IC). This report also includes layout data to allow the audience to cross-probe devices and signals of interest to allow visual correlations between the schematic and layout information for a deeper understanding of the circuit functionality and design.