Phase comparison, i.e. where a phase comparator receives at one input the signal directly from the oscillator, at a second input the same signal but delayed, with a delay depending on a sensing capacitance

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Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 > characterised by the way in which the control signal is generated > Touch switches > Capacitive touch switches > characterised by the detection principle > Phase comparison, i.e. where a phase comparator receives at one input the signal directly from the oscillator, at a second input the same signal but delayed, with a delay depending on a sensing capacitance