公开(公告)号：US20160334902A1

公开(公告)日：2016-11-17

申请号：US14870243

申请日：2015-09-30

Applicant: SYNAPTICS INCORPORATED

Inventor： Zheming LI ,  Saikrishna GANTA ,  Tae-Song CHUNG ,  Rafael BETANCOURT ,  John Michael WEINERTH ,  Farzaneh SHAHROKHI

IPC: G06F3/044 ,  G06F3/041 ,  G06F3/01

CPC classification number: G06F3/044 ,  G06F3/016 ,  G06F3/0416 ,  G06F2203/04108

Abstract: A capacitance measurement circuit cancels background capacitance while reducing charge leakage and supply ripples during reset phases and integrate phases. The capacitance measurement circuit operates a first switch into a linear mode causing a first resistance in the first switch, and after a delay, operates a second switch into a saturation mode causing a second resistance in parallel to the first resistance.

Abstract translation: 电容测量电路消除背景电容，同时减少电荷泄漏并在复位阶段提供纹波并整合相位。 电容测量电路将第一开关操作成线性模式，导致第一开关中的第一电阻，并且在延迟之后，将第二开关操作为饱和模式，使得与第一电阻平行的第二电阻。

公开(公告)号：US20170090669A1

公开(公告)日：2017-03-30

申请号：US14869595

申请日：2015-09-29

Applicant: Synaptics Incorporated

Inventor： Ranga Seshu PALADUGU ,  Chunbo LIU ,  Zheming LI

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04101

Abstract: A processing system for a capacitive sensing input device comprises a charge integrator, a circuit element having a first resistance, and a first switch coupled with the circuit element. The first circuit element is disposed in series with an input of the charge integrator. The first switch is configured to alter the first resistance to a second resistance when selectively closed during at least a portion of an integration phase of the charge integrator. The second resistance is lower than the first resistance.

公开(公告)号：US20190121483A1

公开(公告)日：2019-04-25

申请号：US15865785

申请日：2018-01-09

Applicant: SYNAPTICS INCORPORATED

Inventor： Chunbo LIU ,  Koji KISHI ,  Zheming LI ,  Wenwei YANG

IPC: G06F3/041 ,  H02M3/07 ,  G06F3/044

Abstract: Embodiments herein provide a voltage regulation system comprising a charge pump a voltage regulator and a current regulator. The charge pump is configured to output a current signal to a capacitor. The voltage regulator is configured to sample an output of the capacitor, and compare the sampled voltage to a target voltage to generate a control signal. The current regulator is configured to sample a portion of the output current based on the control signal and regulate the current signal outputted by the charge pump.

公开(公告)号：US20170005572A1

公开(公告)日：2017-01-05

申请号：US14788712

申请日：2015-06-30

Applicant: SYNAPTICS INCORPORATED

Inventor： Zheming LI ,  Steve Chikin LO

IPC: H02M3/07 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  H02M1/44 ,  H02M3/07 ,  H02M2001/0035 ,  Y02B70/16

Abstract: In an example, a processing system for an electronic device, such as a capacitive sensing device, includes a reservoir capacitor configured to store charge from a charge pump, and a control circuit configured to operate the charge pump at irregular intervals to transfer charge to the reservoir capacitor.

Abstract translation: 在一个示例中，用于诸如电容感测装置的电子设备的处理系统包括被配置为存储来自电荷泵的电荷的储存器电容器，以及被配置为以不规则间隔操作电荷泵以将电荷转移到 储层电容器。