This paper presents a novel scalable physical implementation method for high-speed Triple Modular Redundant (TMR) digital integrated circuits in radiation-hard designs. The implementation uses a distributed placement strategy compared to a commonly used bulk 3-bank constraining method. TMR netlist information is used to optimally constrain the placement of both sequential cells and combinational cells. This approach significantly reduces routing complexity, net lengths and dynamic power consumption with more than 60% and 20% respectively. The technique was simulated in a 65 nm Complementary Metal-Oxide Semiconductor (CMOS) technology.

This paper presents a novel physical implementation methodology for high-speed Triple Modular Redundant (TMR) digital integrated circuits for harsh radiation environment applications. An improved distributed approach is presented to constrain redundant branches of Triple Modular Redundant (TMR) digital logic cells using repetitive, interleaved micro-floorplans. To optimally constrain the placement of both sequential and combinational cells, the TMR netlist is used to segment the the logic into unrelated groups allowing sharing without compromising reliability. The technique was evaluated in a 65 nm bulk CMOS technology and a comparison is made to conventional methods.