Abstract: The present invention provides a power control for a power tool having a working head for cutting or shaping a workpiece. The power control includes a trigger control switch on a hand grip attached to an engagement device such as a push stick used with a table saw. The engagement device is moved by the attached hand grip to bring the workpiece and working head into engagement with each other. The power control may be used for rip sawing or miter cutting on a table saw, on a hand-held router or a router table, on a jointer, a band saw, a disk sander, a drill press, or on other conventional power tools having a working head for cutting or shaping a workpiece.

Abstract: A method and apparatus for powering digital logic circuits that provides low power consumption while maintaining high performance. The circuit is divided into logic elements necessary for maintaining the state of the circuit and those that are not. The state-maintaining logic uses low-leakage, low performance transistors, and is continually powered. The remainder of the circuit uses standard transistors, i.e., high performance, high-leakage transistors, and is only powered when the circuit is active, i.e., not in a standby mode. Two power rails are used, one for the state maintaining components and one for the non-state-maintaining components. The state-maintaining logic is functionally separated from the remainder of the circuit when the remainder of the circuit is being powered up or down to avoid short-circuiting any elements. Typical state-maintaining components are sequential logic gates. Typical non-state maintaining components are combinational logic gates.