US 11,789,555 B2
Touch sense control circuit with noise suppression
Patrick Troy Gray, Cedar Park, TX (US); Gerald Dale Morrison, Redmond, WA (US); Daniel Keith Van Ostrand, Leander, TX (US); and Richard Stuart Seger, Jr., Belton, TX (US)
Assigned to SIGMASENSE, LLC., Wilmington, DE (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on Aug. 31, 2021, as Appl. No. 17/446,603.
Application 17/446,603 is a continuation in part of application No. 17/248,473, filed on Jan. 26, 2021, granted, now 11,586,309.
Application 17/248,473 is a continuation of application No. 16/132,131, filed on Sep. 14, 2018, granted, now 10,908,718, issued on Feb. 2, 2021.
Prior Publication US 2022/0057879 A1, Feb. 24, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G06F 3/04886 (2022.01)
CPC G06F 3/0412 (2013.01) [G06F 3/044 (2013.01); G06F 3/0416 (2013.01); G06F 3/04886 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A touch sense control circuit comprises:
an array of drive sense circuits that, when operably coupled to an array of electrodes of a touch screen:
generates drives signals based on reference signals;
provides the drive signals to the array of electrodes;
senses effects of the array of electrodes have on the drive signals; and
generate an array of sensed signals based on the effects;
a reference signal generator that, when enabled, generates the reference signals;
a processing core operably coupled to:
in a first mode of a frame, produce an array of noise canceling signals based on the array of sensed signals; and
in a second mode of the frame, produce touch data based on the array of sensed signals and the array of noise canceling signals.