About: Operand isolation

In electronic low power digital synchronous circuit design, operand isolation is a technique for minimizing the energy overhead associated with redundant operations by selectively blocking the propagation of through the circuit.This technique isolates sections of the circuit (operation) from "seeing" changes on their inputs (operands) unless they are expected to respond to them.This is usually done using latches at the inputs of the circuit. The latches become transparent only when the result of the operation is going to be used. One can also use multiplexers or simple AND gates instead of latches.