Systems and methods for low latency noise cancellation

A method for lowering feedback latency in a low frequency data detection circuit, the method comprising:

• providing a data detector circuit;
• providing a detector mimicking circuit;
• receiving a data input;
• performing a data detection process using the data detector circuit on a first signal derived from the data input to yield a detected output;
• performing a detector mimicking process using the detector mimicking circuit on a second signal derived from the data input to yield a mimicked output;
• calculating an error value as a difference between the second signal and a third signal derived from the mimicked output independent of the detected output;
• generating a feedback signal based at least in part on the error value;
• and
• applying the feedback signal to modify the data input.

A storage system, the storage system comprising:

• a storage medium maintaining a data set;
• a read/write head assembly operable to sense the data set on the storage medium and to provide an analog output corresponding to the data set;
• an amplifier circuit operable to amplify the analog output to yield a data input;
• a data detector circuit operable to perform a data detection process on a first signal derived from a data input to yield a detected output;
• a detector mimicking circuit operable to process a second signal derived from the data input to yield a mimicked output;
• and
• an error calculation circuit operable to calculate a difference between the second signal and a third signal derived from the mimicked output independent of the detected output to yield a feedback signal, wherein the feedback signal is operable to modify the data input during a subsequent period.