RFID IC Clock Frequency Reduction During Impedance Tuning

The patent applies dynamics by making the clock frequency adjustable rather than fixed. The IC dynamically changes its clock frequency based on the tuning stage: operating at a lower frequency during power-constrained tuning operations and at a higher frequency during data processing operations. This dynamic frequency adjustment allows the system to optimize between tuning speed and power consumption, ensuring that harvested RF power is sufficient to complete the impedance matching process.

The patent applies parameter changes by adjusting the clock frequency parameter based on operational context. During tuning operations, the clock frequency is set to a lower value to reduce power consumption and ensure sufficient harvested RF power is available. During data processing operations, the clock frequency is increased to improve processing speed. This parameter adjustment strategy optimizes the balance between power consumption and operational efficiency.

The patent applies self-service by implementing an automatic impedance tuning mechanism that adjusts the matching network parameters without requiring manual intervention. The IC includes a tuning circuit that automatically adjusts capacitive or inductive elements to achieve optimal impedance matching between the antenna and IC input impedance. This self-tuning capability improves power transfer efficiency and operational range while maintaining relatively simple device architecture, as the tuning process occurs automatically during tag initialization.