Abstract: A method, apparatus and computer program product for an external, self-initializing FIFO containing indexes of free CAM memory locations is presented. When data is sent to the CAM for a lookup, this external FIFO provides the CAM with the index of a free memory location within the CAM so that if the data word is not found in the CAM (i.e. a CAM miss), the data can be written to the designated available free entry in the CAM. Thus, if the same data word is searched in the CAM in the following cycle it will result in a hit.

Abstract: A CMOS regulated complementary charge pump circuit uses imbalanced current regulation and symmetrical capacitive loading of input signals to provide a proportional response and high sensitivity at small phase differences. The charge pump is suitable for operation at very high frequencies, and therefore finds applications in delay-locked and phase-locked loops used to regenerate system clock signals within VLSI circuits. The use of current limiting devices in the switch pass gates permits a balancing of the capacitive loads presented to the input signals. Adjustable capacitors permit the elimination of a static phase offset at a zero operating point.