RC Calibration Circuit for Variable Clock Periods

The patent applies dynamics by making the charging time dynamically adjustable based on the clock signal period. The processing circuit calculates the required charging time using the formula t_charge = k × T_clock, where T_clock is the clock signal period and k is a calibration parameter. This dynamic adjustment allows the circuit to adapt to different clock frequencies while maintaining calibration accuracy, eliminating the need for redesign when clock signals change.

The patent changes the parameter of charging time based on the clock signal characteristics. By adjusting the charging time parameter according to the clock period and using a magnification factor to scale the input clock signal, the circuit maintains accurate RC calibration across different clock frequencies without requiring hardware redesign, thus resolving the contradiction between calibration accuracy and adaptability.

The patent uses periodic action by utilizing the clock signal's periodic nature to control the charging process. The charging time is set as an integer multiple of the clock period (t_charge = k × T_clock), allowing the calibration to be completed in a finite number of clock cycles. This periodic approach ensures both adequate charging time for accuracy and a bounded calibration duration for productivity.

The patent employs a magnification factor to scale the input clock signal frequency, creating a modified clock signal with adjusted period. This copied and scaled clock signal allows the system to achieve the required charging time for accurate calibration while maintaining synchronization with the original clock signal, thus balancing calibration accuracy with calibration speed.