Systems and Methods for Mitigating Latency in a Data Detector Feedback Loop

A method for reducing latency in an error corrected data retrieval system, the method comprising:

• performing an analog to digital conversion at a sampling instant to create a digital sample;
• performing a data detection on the digital sample to create a detected output;
• comparing the detected output with the digital sample to determine a phase error;
• during an interim period, adjusting the digital sample to reflect the phase error to create an adjusted digital sample;
• and
• after the interim period, adjusting the sampling instant to reflect the phase error.

A data processing system, the data processing system comprising:

• a data receiving device, wherein the data receiving device derives an analog signal from a medium, and wherein the data receiving device further includes:
• an analog to digital converter, wherein the analog to digital converter is operable to receive the analog signal and to provide a first digital signal corresponding to the analog signal at a first sampling instant;
• a data detector, wherein the data detector is operable to perform a data detection process on the first digital signal to provide a modified data signal;
• an error determination circuit, wherein the error determination circuit is operable to compare the modified data signal with a derivative of the first digital signal to determine a first error indication;
• a first feedback loop, wherein the first feedback loop receives the first error indication and causes the analog to digital converter to provide a second digital signal corresponding to the analog signal at a second sampling instant, and wherein the second sampling instant is adjusted to reflect the first error indication;
• and
• a second feedback loop, wherein the second feedback loop receives the first error indication and adjusts the derivative of the first digital signal such that the error determination circuit determines a second error indication based at least in part on the adjusted derivative of the first digital signal.