US 11,777,514 B2
Front-end circuit performing analog-to-digital conversion and touch processing circuit including the same
Sanho Byun, Suwon-si (KR); Minsung Kim, Suwon-si (KR); and Jungmoon Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Mar. 16, 2022, as Appl. No. 17/696,252.
Application 17/696,252 is a continuation of application No. 16/738,077, filed on Jan. 9, 2020, granted, now 11,296,719.
Claims priority of application No. 10-2019-0059700 (KR), filed on May 21, 2019.
Prior Publication US 2022/0209784 A1, Jun. 30, 2022
Int. Cl. G06F 3/044 (2006.01); H03M 1/36 (2006.01); H03M 1/44 (2006.01)
CPC H03M 1/442 (2013.01) [G06F 3/044 (2013.01); H03M 1/361 (2013.01)] 20 Claims
OG exemplary drawing
 
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.