公开(公告)号：US11855652B2

公开(公告)日：2023-12-26

申请号：US17643349

申请日：2021-12-08

Applicant: XILINX, INC.

Inventor： Hao-Wei Hung ,  Tan Kee Hian ,  Siok Wei Lim ,  Hongtao Zhang

IPC: H03M1/10 ,  H03M9/00 ,  H03M1/66

CPC classification number: H03M1/1023 ,  H03M1/1047 ,  H03M9/00 ,  H03M1/66

Abstract: A multiplexer (MUX) calibration system includes main MUX circuitry, first replica MUX circuitry, digital-to-analog (DAC) circuitry, detection circuitry, and control circuitry. The main MUX circuitry receives clock signals and outputs a first data signal based on the clock signals. The first replica MUX circuitry receives the clock signals and outputs a second data signal based on the clock signals. The DAC circuitry generates an offset voltage. The detection circuitry receives the second data signal and the offset voltage and generates a first error signal based on one or more of the second data signal and the offset voltage. The control circuitry receives the first error signal and generates a first control signal indicating an adjustment to the clock signals.