Content Addressable Memory Power Control via Valid Bit Gating

The patent applies periodic action by enabling comparison circuits only during specific clock cycles when valid data is present in the CAM. The power control logic monitors valid bits and activates comparison circuits periodically rather than continuously, reducing power consumption while maintaining search capability when needed. This is achieved through clock gating that selectively enables clock signals to comparison circuits based on the presence of valid data.

The patent implements dynamics by making the operational state of comparison circuits variable rather than static. The power control logic dynamically adjusts the activation state of comparison circuits based on real-time detection of valid data in the CAM. When valid data is detected, comparison circuits are activated; when no valid data is present, they are deactivated, creating a dynamic power management system that adapts to operational conditions.

The patent implements feedback by using the valid bit status as feedback information to control the activation of comparison circuits. The power control logic continuously monitors the valid bits in the CAM and uses this feedback to determine whether to activate or deactivate comparison circuits. This feedback mechanism ensures that comparison circuits are only active when there is valid data to compare, maintaining reliability while reducing unnecessary power consumption.

The patent applies self-service by enabling the CAM system to automatically manage its own power consumption based on its operational state. The power control logic is integrated within the CAM system and autonomously decides when to activate or deactivate comparison circuits based on the presence of valid data, without requiring external control. This self-service approach ensures reliable operation while minimizing power consumption.