This document summarizes research on reconstructing the structural design of field-programmable gate arrays (FPGAs). It discusses how logic block complexity, interconnect structure, hardwired logic blocks, and data path implementation can impact the area and speed of FPGAs. The document analyzes past studies that examined how varying the number of lookup table (LUT) inputs, routing flexibility between blocks, and use of hardwired connections affected the routability and timing of mapped circuits. It also describes how FPGAs can be optimized for logic emulation applications by multiplexing logic units over time through memory-based architectures. In general, the document reviews FPGA architectural parameters and how researchers have iteratively improved designs through simulation and