公开(公告)号：US20150253799A1

公开(公告)日：2015-09-10

申请号：US14201590

申请日：2014-03-07

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： CheeWeng Cheong ,  Kien Beng Tan ,  Dianbo Guo

IPC: G05F3/16

CPC classification number: G05F3/16 ,  G05F3/262

Abstract: A current source includes a first current path including a first current mirror transistor and an input current source coupled in series, a second current path including a second current minor transistor, wherein control terminals of the first and second current minor transistors are connected, a first circuit configured to provide a controlled auxiliary current in the second current path, and a second circuit configured to provide a controlled output current in the second current path when or after the auxiliary current has reached steady state. The current source may include one or more cascode transistors in the first current path and one or more cascode transistors in the second current path. The first circuit may be activated before the second circuit is activated.

Abstract translation: 电流源包括包括串联耦合的第一电流镜晶体管和输入电流源的第一电流路径，包括第二电流次级晶体管的第二电流路径，其中连接第一和第二电流次级晶体管的控制端，第一 电路，被配置为在第二电流路径中提供受控的辅助电流;以及第二电路，被配置为在辅助电流达到稳定状态时或之后提供第二电流路径中的受控输出电流。 电流源可以包括第一电流路径中的一个或多个共源共栅晶体管和第二电流路径中的一个或多个共源共栅晶体管。 第一电路可以在第二电路被激活之前被激活。

公开(公告)号：US09710104B2

公开(公告)日：2017-07-18

申请号：US14245915

申请日：2014-04-04

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： CheeWeng Cheong ,  Leonard Dinu ,  Dianbo Guo ,  Kien Beng Tan

IPC: G06F3/041

CPC classification number: G06F3/0418

Abstract: A touch screen device having a touch screen panel and a method for operating a touch screen device are provided. The method includes monitoring, during a noise monitoring phase, channel signals of a first set of channels and a second set of channel of the touch screen panel, detecting a stylus signal in response to a channel signal greater than a stylus threshold and less than a palm threshold, selecting the first set of channels when the stylus signal is detected on at least one channel of the first set of channels and is not detected on the second set of channels, and selecting the second set of channels when the stylus signal is detected on at least one channel of the second set of channels and is not detected on the first set of channels.

公开(公告)号：US09523994B2

公开(公告)日：2016-12-20

申请号：US14201590

申请日：2014-03-07

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： CheeWeng Cheong ,  Kien Beng Tan ,  Dianbo Guo

IPC: G05F3/26 ,  G05F3/16

CPC classification number: G05F3/16 ,  G05F3/262

Abstract: A current source includes a first current path including a first current mirror transistor and an input current source coupled in series, a second current path including a second current minor transistor, wherein control terminals of the first and second current minor transistors are connected, a first circuit configured to provide a controlled auxiliary current in the second current path, and a second circuit configured to provide a controlled output current in the second current path when or after the auxiliary current has reached steady state. The current source may include one or more cascode transistors in the first current path and one or more cascode transistors in the second current path. The first circuit may be activated before the second circuit is activated.

Abstract translation: 电流源包括包括串联耦合的第一电流镜晶体管和输入电流源的第一电流路径，包括第二电流次级晶体管的第二电流路径，其中连接第一和第二电流次级晶体管的控制端，第一 电路，被配置为在第二电流路径中提供受控的辅助电流;以及第二电路，被配置为在辅助电流达到稳定状态时或之后提供第二电流路径中的受控输出电流。 电流源可以包括第一电流路径中的一个或多个共源共栅晶体管和第二电流路径中的一个或多个共源共栅晶体管。 第一电路可以在第二电路被激活之前被激活。

公开(公告)号：US20150286297A1

公开(公告)日：2015-10-08

申请号：US14245915

申请日：2014-04-04

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： CheeWeng Cheong ,  Leonard Dinu ,  Dianbo Guo ,  Kien Beng Tan

IPC: G06F3/0354 ,  G06F3/041

CPC classification number: G06F3/0418

Abstract: A touch screen device having a touch screen panel and a method for operating a touch screen device are provided. The method includes monitoring, during a noise monitoring phase, channel signals of a first set of channels and a second set of channel of the touch screen panel, detecting a stylus signal in response to a channel signal greater than a stylus threshold and less than a palm threshold, selecting the first set of channels when the stylus signal is detected on at least one channel of the first set of channels and is not detected on the second set of channels, and selecting the second set of channels when the stylus signal is detected on at least one channel of the second set of channels and is not detected on the first set of channels.

Abstract translation: 提供了一种具有触摸屏面板的触摸屏设备和用于操作触摸屏设备的方法。 该方法包括在噪声监测阶段期间监测第一组通道的通道信号和触摸屏面板的第二组通道，响应于大于触针阈值的通道信号检测触针信号，并小于一个 手掌阈值，当在第一组信道的至少一个信道上检测到触笔信号时选择第一组信道，并且在第二组信道上未检测到第一组信道，并且当检测到触笔信号时选择第二组信道 在第二组信道的至少一个信道上，并且在第一组信道上未检测到。