US 11,757,466 B2
System and method for dynamic element matching for delta sigma converters
Abhishek Bandyopadhyay, Winchester, MA (US); Preston S. Birdsong, Medfield, MA (US); and Adam R. Spirer, Westwood, MA (US)
Assigned to Analog Devices, Inc., Wilmington, MA (US)
Filed by Analog Devices, Inc., Wilmington, MA (US)
Filed on Aug. 6, 2021, as Appl. No. 17/395,902.
Claims priority of provisional application 63/063,503, filed on Aug. 10, 2020.
Prior Publication US 2022/0045693 A1, Feb. 10, 2022
Int. Cl. H03M 1/66 (2006.01); H03M 3/00 (2006.01); H04L 25/03 (2006.01); H04L 25/49 (2006.01); H03M 1/74 (2006.01)
CPC H03M 3/50 (2013.01) [H03M 1/66 (2013.01); H03M 3/39 (2013.01); H04L 25/03006 (2013.01); H04L 25/4917 (2013.01); H03M 1/747 (2013.01); H04L 2025/03363 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for rotational dynamic element matching in a delta sigma converter, comprising:
a rotational dynamic element matching (DEM) component configured to receive a data signal, wherein the rotational DEM component has a plurality of elements included in a barrel shifter, a start pointer, and a current pointer, wherein the start pointer and the current pointer point to elements in the same barrel shifter;
wherein the current pointer shifts in a first direction when the data signal is positive and wherein the current pointer shifts in an opposite direction when the data signal is negative; and
wherein the start pointer is jumped by a fixed value when the current pointer and the start pointer are equal and point to the same DEM element.