Abstract: A computer-based circuit-design tool includes a front end, an interpreter coupled to the front end, and a generator coupled the interpreter. The front end receives symbols that define an algorithm, and the interpreter parses the algorithm into respective algorithm portions. The generator identifies a corresponding circuit template for each of the algorithm portions, each template defining a circuit for executing the respective algorithm portion, and interconnects the identified templates such that the interconnected templates define a circuit that is operable to execute the algorithm. As compared to prior design tools, this tool may decrease the time and effort required to design a circuit for instantiation on a programmable logic integrated circuit (PLIC) or on an application-specific integrated circuit (ASIC) by allowing one to construct the circuit from previously written templates that define previously tested and debugged circuits.

Abstract: A library includes one or more circuit templates and an interface template. The one or more circuit templates each define a respective circuit operable to execute a respective algorithm or portion thereof. And the interface template defines a hardware layer operable to interface one of the circuits to pins of a programmable logic circuit when the layer and the one circuit are instantiated on the programmable logic circuit. Such a library may shorten the time and reduce the effort that an engineer expends designing a circuit for instantiation on a PLIC or ASIC by allowing the engineer to build the circuit from templates of previously designed and debugged circuits.

Abstract: A building protection system comprises a filtration unit, an air handling unit, an emergency exhaust subsystem, a first damper positioned between the filtration unit and the air handling unit, and a second damper positioned between the emergency exhaust subsystem and the filtration unit. The first damper is selectively opened and the second damper is selectively closed to filter outside air as it enters a building, and the first damper is selectively closed and the second damper is selectively opened to filter inside air as it is exhausted from, the building.