US 11,843,413 B1
Signal transmitters with size-reduced on-chip memory
Long Kong, Campbell, CA (US); Chia-Hsiang Chen, Sunnyvale, CA (US); and Utku Seckin, Santa Clara, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Mar. 29, 2022, as Appl. No. 17/707,778.
Int. Cl. H04B 1/7163 (2011.01); H04B 1/717 (2011.01)
CPC H04B 1/71635 (2013.01) [H04B 1/7172 (2013.01); H04B 2201/7163 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a waveform synthesis circuit, comprising:
a storage circuit configured to store a plurality of values of a first waveform for a first channel; and
a waveform generation circuit configured to generate a plurality of values of a second waveform for a second channel, wherein the values of the second waveform are generated using interpolation of the values of the first waveform stored in the storage circuit; and
a signal transmission circuit configured to:
generate a first signal for the first channel based at least in part on the values of the first waveform;
generate a second signal for the second channel based at least in part on the values of the second waveform; and
transmit the first and second signals.