Serial Bus Receiver with Dual Thresholds for Conflict Detection

The patent applies parameter changes by introducing multiple receive thresholds (first receive threshold and second receive threshold) instead of a single threshold. The second receive threshold has a voltage value less than the first receive threshold, creating distinct voltage level ranges for different bus states. This allows the receiver to differentiate between dominant and recessive bus states even when both are actively driven at high clock frequencies, thereby maintaining reliable transmission conflict detection while achieving high data transmission rates.

The patent applies dynamics by enabling the bus system to operate in different communication phases with different clock frequencies. The system can dynamically switch between a first clock frequency for the arbitration phase and a second, higher clock frequency for the data phase. This dynamic frequency adjustment allows the system to maintain compatibility with standard CAN protocols for arbitration while achieving Ethernet-like transmission speeds for data transfer, thus increasing both user data capacity and transmission speed.

The patent introduces an intermediary mechanism in the form of a receiver that uses multiple receive thresholds to mediate the detection of bus states. Instead of relying on traditional methods that compare transmit and receive signals, the receiver uses the first and second receive thresholds to determine whether a dominant or recessive bus state is present on the bus. This intermediary threshold-based detection method enables reliable transmission conflict detection even when both bus states are actively driven, maintaining data transmission efficiency while solving the detection problem.