US 12,191,875 B2
Reducing harmonic distortion by dithering
Benjamin John Oliver Long, Bristol (GB); and Brian Kappus, Campbell, CA (US)
Assigned to ULTRALEAP LIMITED, Bristol (GB)
Filed by Ultraleap Limited, Bristol (GB)
Filed on Aug. 4, 2023, as Appl. No. 18/365,313.
Application 18/365,313 is a continuation of application No. 17/807,730, filed on Jun. 19, 2022, granted, now 11,742,870.
Application 17/807,730 is a continuation of application No. 17/068,825, filed on Oct. 12, 2020, granted, now 11,374,586, issued on Jun. 28, 2022.
Claims priority of provisional application 62/914,487, filed on Oct. 13, 2019.
Prior Publication US 2023/0378966 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03M 1/20 (2006.01); H03M 1/06 (2006.01); H03M 3/00 (2006.01)
CPC H03M 1/0641 (2013.01) [H03M 3/332 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A system comprising:
an electrical signal wherein the electrical signal has a plurality of pulse edges and is driven by an amplitude pulse width modulation and by a phase pulse width modulation;
wherein at least one of the plurality of pulse edges is perturbed by dither on a phase angle drawn from a statistical distribution;
wherein the statistical distribution is dependent on a time-based function of phase change at each of the plurality of pulse edges.