Abstract: A method of generating power vectors to calculate power dissipation for a circuit cell is provided. The method involves formulating the Boolean equations (30) that describe the logical operation for a circuit cell (10). Primitive power vectors that cause an output to transition are generated (32) using Boolean difference functions. Internal power vectors that cause an internal node to transition without transitioning the output are generated (34) using Boolean difference functions. Static power vectors with all possible steady state inputs are also generated (36). The power vectors are minimized (38) to eliminate redundant vectors. The resulting power vectors can be used in a circuit simulation in evaluating (40) the power dissipation of a designed logic circuit.

Abstract: A method for generating and simulating test patterns to detect faults (57, 63) in an integrated circuit. The method comprises identifying all nets (27) which can potentially be shorted together. Each potential fault (34, 36, 37, 38, 39) is categorized as either a feedback fault or a non-feedback fault. A test pattern is generated to detect the selected potential fault. The test pattern is simulated to determine which additional potential faults are detected by the test pattern. Potential faults which are detected by the test pattern are deleted from the fault list (12). The method is repeated until no potential faults remain on the fault list (12).

Abstract: A dandruff remover device including two inclined combs connected to a holder for a blade having a non-cutting edge, which blade is arranged to be extended to against spring pressure into a cleaning position between the teeth of the combs.