US 11,742,870 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 Jun. 19, 2022, as Appl. No. 17/807,730.
Application 17/807,730 is a continuation of application No. 17/068,825, filed on Oct. 12, 2020, granted, now 11,374,586.
Claims priority of provisional application 62/914,487, filed on Oct. 13, 2019.
Prior Publication US 2022/0329250 A1, Oct. 13, 2022
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 an instantaneous frequency at each of the plurality of pulse edges.