79results about How to "Reduce the number of sampling points" patented technology

The invention provides a device and a method for correcting error estimation of an analog-digital converter. The method comprises the steps as follows: generating a control signal to finely adjust a numerical control simulation time delay unit according to a correction parameter initial value which is set in advance to adjust time delay amount and correct clock phase error among channels; correcting gain error among channels according to the correction parameter initial value and generating a totality correction signal, buffering the totality correction signal and triggering a counting unit to count, simultaneously calling the totality correction signal in a cache and generating an initial estimation result by using a circular correlation method; setting enabling ends of a low pass filter accumulation unit and a correction parameter updating unit while counting to a preset value, generating the error estimation with the initial estimation result and latching, updating a clock correction parameter and a gain correction parameter according to a gradient descent method, and latching the clock correction parameter and the gain correction parameter, and resetting to correct circulation estimation. The device and the method of the invention improve the estimated accuracy and quickens convergence rate of the estimation correction under the condition of using few effective sample points.