公开(公告)号：US20210091598A1

公开(公告)日：2021-03-25

申请号：US17007225

申请日：2020-08-31

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Eng Jye NG ,  Chee Weng CHEONG ,  Huiqiao HE

IPC: H02J50/10 ,  H02J7/02 ,  H02M1/36 ,  H02M1/08

Abstract: A system comprising includes a wireless power receiver generating a rectified voltage. A low dropout regulator (LDO) generates a first regulated output voltage from the rectified voltage, during a first phase. A first switch couples the first regulated output voltage to a voltage output node during the first phase. During a second phase, the LDO generates a second regulated output voltage from the rectified voltage. A switching regulator generates a third regulated output voltage during the second phase. A second switch couples the third regulated output voltage to the voltage output node during the second phase. During a third phase, the LDO is disabled, while the switching regulator continues to generate the third regulated output voltage. The first switch opens during the third phase while the second switch remains closed.

公开(公告)号：US20180300016A1

公开(公告)日：2018-10-18

申请号：US16014664

申请日：2018-06-21

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Hugo GICQUEL ,  Eng Jye NG

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04101 ,  G06F2203/04104

Abstract: A method of differential self-capacitance measurement is used to enhance a signal-to-noise ratio of sense lines in a touch panel display, thereby improving touch sensor accuracy. The differential self-capacitance measurement is implemented for a touch panel using charge sharing between adjacent sense lines of the touch panel matrix. Sequential differential self-capacitance measurements can be compared with one another by computing the difference |CS1−CS2|−|CS2−CS1| to sense a change caused by an intervening event. By scanning the entire touch panel matrix, events can be tracked across the touch panel.