Phase compensation for multi-stimulus controller
First Claim
Patent Images
1. A method comprising:
- measuring individual phase delays of each drive line and sense line pair of a multi-stimulus sensing system, the multi-stimulus sensing system being a sensing system that scans, in a plurality of steps, drive lines with drive signals of different phases, each step including simultaneously stimulating a plurality of drive lines with a plurality of drive signals, the phases of the drive signals corresponding to a predetermined set of phases, the application of drive signals in each step generating a set of sense signals in the sense lines, each sense signal including a superposition of component signals that correspond to different drive lines paired with the sense line of the sense signal; and
determining a set of compensated phases based on the individual phase delays and the predetermined set of phases, the plurality of sets of sense signals being decoded based on the set of compensated phases.
1 Assignment
0 Petitions
Accused Products
Abstract
Determining a compensated phase matrix for a multi-stimulus demodulation process is provided. A first drive line of a multi-stimulus sensing system is selected, and a stimulation signal is transmitted on the selected drive line. A channel gain resulting from the stimulation signal is measured from a received sense signal resulting from the stimulation signal. The measured channel gain is compared with a known channel gain to obtain an individual phase compensation for the selected drive line. A compensated phase matrix is formed of the individual phase compensation values for multiple drive lines.
-
Citations
20 Claims
-
1. A method comprising:
-
measuring individual phase delays of each drive line and sense line pair of a multi-stimulus sensing system, the multi-stimulus sensing system being a sensing system that scans, in a plurality of steps, drive lines with drive signals of different phases, each step including simultaneously stimulating a plurality of drive lines with a plurality of drive signals, the phases of the drive signals corresponding to a predetermined set of phases, the application of drive signals in each step generating a set of sense signals in the sense lines, each sense signal including a superposition of component signals that correspond to different drive lines paired with the sense line of the sense signal; and determining a set of compensated phases based on the individual phase delays and the predetermined set of phases, the plurality of sets of sense signals being decoded based on the set of compensated phases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system comprising:
-
a measuring system that measures individual phase delays of each drive line and sense line pair of a multi-stimulus sensing system, the multi-stimulus sensing system being a sensing system that scans, in a plurality of steps, drive lines with drive signals of different phases, each step including simultaneously stimulating a plurality of drive lines with a plurality of drive signals, the phases of the drive signals corresponding to a predetermined set of phases, the application of drive signals in each step generating a set of sense signals in the sense lines, each sense signal including a superposition of component signals that correspond to different drive lines paired with the sense line of the sense signal; and a compensation determiner that determines a set of compensated phases based on the individual phase delays and the predetermined set of phases, the plurality of sets of sense signals being decoded based on the set of compensated phases. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification