CPC H03M 1/442 (2013.01) [G06F 3/044 (2013.01); H03M 1/361 (2013.01)] | 20 Claims |
1. A method for controlling a front-end-circuit configured to process an input signal that varies according to a touch, the method comprising:
configuring the front-end-circuit as a first circuit to accumulate a deviation of the input signal between a first phase and a second phase as an accumulated deviation during an integration period by switching ones of a plurality of switches included in the front-end circuit such that an output of an amplifier included in the front-end-circuit is fed-back to an input of the amplifier;
determining whether the integration period has completed, based on the number of periods each including the first phase and the second phase; and
configuring the front-end-circuit as a second circuit to convert the accumulated deviation into a digital signal during a conversion period by switching ones of the plurality of switches such that the output of the amplifier is provided to a comparator.
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