Patent ID: 9619094
Date: 2017-04-11
CPC Classifications: G06F

Claim:
1. A method comprising: establishing a first reference sequence with which to correlate signals received at one or more receive columns to touch detection conditions; starting with a first set of candidate reference sequences each differing from the first reference sequence, reducing the first set of candidate reference sequences by applying a rule set to the first set to derive a relatively smaller second set of candidate reference sequences; for each candidate reference sequence in the second set of candidate reference sequences, calculating a touch detection performance score of a combined reference sequence, the combined reference sequence being a sum of the first reference sequence and at least the candidate reference sequence for which the calculating is performed; and configuring at least a portion of a receive circuit to correlate signals received at one or more of the receive columns to at least one of the touch detection conditions by using the first reference sequence in a combined correlation operation with at least a selected candidate reference sequence from the second set of candidate reference sequences, the selected candidate reference sequence being selected based on a corresponding touch detection performance score.