SAR ADC Error Correction for Dead Voltage and Burr Interference

The patent applies preliminary action by performing error detection and correction before the comparator output is finalized. The time decision module pre-judges whether the comparator has completed comparison within the specified time, and the data comparator pre-detects burr interference conditions. This allows errors to be identified and corrected in advance, preventing incorrect outputs while maintaining the high-speed asynchronous conversion process.

The patent implements feedback mechanisms where the time decision module monitors comparator completion status and feeds back control signals to prevent incorrect conversions. The data comparator also provides feedback by detecting latch output errors and triggering correction logic. These feedback loops ensure that asynchronous operation does not compromise output accuracy.

The patent segments the error correction function into distinct modular components: a time decision module that monitors comparison completion, a data comparator that detects latch output errors, and correction logic units. This segmentation allows each module to perform a specific function independently, making the overall system more manageable and maintainable while achieving high output accuracy.

The patent applies local quality by implementing error detection and correction only at critical points in the conversion process - specifically at the comparator output stage and latch output stage. Rather than applying complex correction throughout the entire system, the solution focuses error handling resources where they are most needed, reducing overall circuit complexity while maintaining high precision.