US 12,445,155 B2
Wireless transmitters having self-interference cancellation circuitry
Yen-Ling Huang, San Jose, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Feb. 10, 2023, as Appl. No. 18/167,397.
Application 18/167,397 is a continuation of application No. 17/475,915, filed on Sep. 15, 2021, granted, now 11,595,067.
Application 17/475,915 is a continuation of application No. 16/994,423, filed on Aug. 14, 2020, granted, now 11,245,430, issued on Feb. 8, 2022.
Prior Publication US 2023/0198561 A1, Jun. 22, 2023
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0475 (2013.01) 20 Claims
OG exemplary drawing
 
1. Wireless circuitry comprising:
a first signal path;
a second signal path;
a first circuit configured to output a fundamental self-interference term image;
a second circuit configured to output a second order self-interference term, the first circuit and the second circuit being coupled in parallel between the first signal path and the second signal path;
a bypass path coupled between the first signal path and the second signal path around the first circuit and the second circuit; and
a digital-to-analog converter (DAC), wherein an input of the DAC is communicatively coupled to an output of the second signal path and an output of the bypass path.