主权项 |
1. A method of reducing offset errors in a data slicer having at least two analog inputs and a digital output, the method comprising the steps of:
a) applying a fixed signal to a first one of the data slicer inputs, the fixed signal having a known value; b) applying a calibration signal to a second one of the data slicer inputs, the calibration signal having a value; c) setting the value of the calibration signal to a first starting value; d) changing the value of the calibration signal by an amount having a first polarity; e) repeating step d) until the output of the slicer-latch changes state; f) storing a value of the calibration signal as a first value; g) setting the value of the calibration signal to a second starting value different from the first starting value; h) changing the value of the calibration signal by a second amount having a second polarity opposite the first polarity; i) repeating step h) until the output of the slicer-latch changes state; j) averaging the value of the calibration signal with the first value to form an calibration signal average value; k) applying the calibration signal average value as the calibration signal to the data slicer input; l) removing the fixed signal from the data slicer input; and m) applying an input signal to the data slicer input. |