Patent ID: 6580652
Filing Date: 2003-06-17
Classification: G06F,G11C

Abstract:
A circuit for selecting a highest priority signal from a plurality of input signals, said circuit comprising:a) a plurality of serially coupled input blocks, each of said input blocks being coupled to a corresponding one of a plurality of input lines for receiving respective ones of said input signals and providing corresponding output signals; b) a pre-charging device coupled between a first supply voltage terminal and a first one of said serially coupled input blocks, said pre-charging device coupling said first supply voltage to said first one of said serially coupled input blocks in response to a clock pulse signal transition; c) an activation device coupled between a second supply voltage terminal and a last one of said serially coupled input blocks, said activation device coupling said second supply voltage to said last one of said serially coupled input blocks in response to an activation signal transition; whereby said second supply voltage is propagated through said plurality of input blocks to an input block having an input signal voltage that is different from a predefined voltage, and whereby said second supply voltage terminal is subsequently provided as the only output from said plurality of input blocks representing a highest priority match signal.