US 12,081,226 B2
Feed-forward in tracking analog-to-digital converter
Giovanni Saccomanno, Munich (DE); Alberto Celin, Munich (DE); Fabio Busignani, Munich (DE); and Siarhei Meliukh, Munich (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 9, 2022, as Appl. No. 17/931,065.
Prior Publication US 2024/0088909 A1, Mar. 14, 2024
Int. Cl. H03M 1/18 (2006.01); H03M 1/00 (2006.01); H03M 1/10 (2006.01); H03M 1/34 (2006.01)
CPC H03M 1/181 (2013.01) [H03M 1/001 (2013.01); H03M 1/1071 (2013.01); H03M 1/34 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a feedback circuit configured to generate a feedback signal using an input voltage;
a comparison circuit configured to sample, using a plurality of threshold values, the feedback signal to generate a plurality of samples;
a counter circuit configured to update a count value using a subset of the plurality of samples; and
a digital-to-analog converter (DAC) circuit configured to generate a control signal using the count value;
wherein the feedback circuit is further configured to modify the feedback signal using the control signal and at least one of the plurality of samples.