Inductive Transponder Timing Calibration for Protocol Compatibility

The patent applies preliminary action by transmitting a reference duration before the actual data characters. This reference duration allows the transponder to pre-calculate a calibration value that compensates for timing variations caused by high-quality resonant circuits. The calibration value is stored and used to adjust subsequent duration measurements, ensuring accurate character decoding even when timing is affected by extended transmission range conditions.

The patent applies dynamics by making the transponder's protocol behavior adaptive rather than fixed. The transponder includes logic that detects whether a reference duration is present in the received signal sequence. If a reference duration is detected, the transponder enters calibration mode to calculate and apply timing compensation. If no reference duration is detected, the transponder automatically switches to standard mode without calibration. This dynamic adaptation allows the same transponder to work reliably with both calibrated and non-calibrated base stations.

The patent applies feedback by using the reference duration as a feedback mechanism. The transponder measures the actual duration of the reference duration signal, compares it with the expected standard duration, and calculates a calibration value representing the deviation. This calibration value is then fed back into the duration measurement process for subsequent characters, automatically correcting for timing deviations caused by parameter variations such as resonant circuit quality, temperature, or component tolerances.