Systems and methods for high order asymmetry correction

A data processing circuit, the data processing circuit comprising:

• an analog pre-processing circuit, wherein the analog pre-processing circuit receives a data input and provides a processed input, and wherein the processed input includes a second order error component;
• a correction circuit, wherein the correction circuit is operable to:
• receive the processed input;
• apply a first order transfer function to the processed input to reduce at least a portion of the second order error component;
• provide an output signal, wherein the output signal is the result of applying the transfer function to the input signal;
• and
• a data detector circuit, wherein the detector circuit applies a detection algorithm to a derivative of the output signal.

A method for signal offset cancellation, the method comprising:

• receiving an input signal, wherein the input signal includes a second order error component;
• applying a transfer function to the input signal to reduce the second order error component, wherein the transfer function is:
• [
• 0.5
• (
• 1
• -
• az
• ⁡
• (
• t
• )
• )
• +
• 1.5
• (
• 1
• +
• az
• ⁡
• (
• t
• )
• )
• -
• 1
• ]
• ,
• wherein the z(t) term is the input signal and the a term is a scalar;
• and
• providing an output signal, wherein the output signal is the result of applying the transfer function to the input signal.