The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2024
Filed:
May. 31, 2022
Xilinx, Inc., San Jose, CA (US);
Roswald Francis, Kildare, IE;
XILINX, INC., San Jose, CA (US);
Abstract
Examples describe a switched capacitor (SC) circuitry calibrated to mitigate the pole-zero (PZ) doublet errors that occur in an analog circuitry. Due to PZ-doublet errors, the slow settling time response of an input step function to an analog circuitry make it impractical to use in applications such as a digital oscilloscope. Mitigating the PZ-doublet errors in the frequency domain is not practical due to the problem of the generation of low frequency sinusoidal tones. The solution disclosed in the present invention is to apply a step function and examine the output's slow settling error waveform. A signal is input to an analog to digital converter, and the output of the converter is processed by a computation that produces calibration codes. Calibration codes are coupled to a SC circuitry to mitigate the PZ-doublet errors. The error waveform is then minimized within a specified accuracy.