公开(公告)号：US20180232071A1

公开(公告)日：2018-08-16

申请号：US15953017

申请日：2018-04-13

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Chee Weng CHEONG ,  Leonard Liviu DINU ,  Dianbo GUO ,  Kien Beng TAN

IPC: G06F3/0354 ,  G06F3/041 ,  G06F3/038 ,  H04L27/00

CPC classification number: G06F3/03545 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0416 ,  G06F2203/0384 ,  H04L2027/0097

Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals. Further, the detection window duration and start times may be adjusted based on previously detected (or undetected) synchronization signals in order to compensate for noise overshadowing synchronization signals.

公开(公告)号：US20150256330A1

公开(公告)日：2015-09-10

申请号：US14199510

申请日：2014-03-06

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Leonard Liviu DINU ,  Chee Weng CHEONG

IPC: H04L7/033 ,  G06F3/0354 ,  H04L7/00 ,  G06F3/041

CPC classification number: G06F3/03545 ,  G06F3/041 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/0384 ,  H03L7/00

Abstract: A system and method for compensating for detected phase errors during communications between synchronized devices. In an embodiment, the two devices may be a touch screen device and a synchronized stylus device. To this end, the touch screen device includes a controller configured to receive data signals from the stylus at specific time intervals. The touch screen device generates an internal control signal for receiving the incoming data signals at an expected frequency. The touch screen device further includes circuitry for measuring differences in the time a data signal is actually received against when the data signal was expected to be received and determines a time difference (e.g., a phase error). Then, the internal control signal may be adjusted to compensate for the accumulated phase error. Such a measurement and compensation helps ensure that communications remain in synchronization without having to reestablish synchronization through a cumbersome synchronization process.

Abstract translation: 用于补偿同步设备之间通信期间检测到的相位误差的系统和方法。 在一个实施例中，两个设备可以是触摸屏设备和同步的触笔设备。 为此，触摸屏设备包括被配置为以特定时间间隔从触控笔接收数据信号的控制器。 触摸屏设备产生用于以预期频率接收输入数据信号的内部控制信号。 触摸屏设备还包括用于测量当数据信号被预期接收时实际接收数据信号的时间差异并确定时间差（例如，相位误差）的电路。 然后，可以调整内部控制信号以补偿累积的相位误差。 这样的测量和补偿有助于确保通信保持同步，而无需通过繁琐的同步过程重新建立同步。

公开(公告)号：US20200042140A1

公开(公告)日：2020-02-06

申请号：US16653172

申请日：2019-10-15

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Leonard Liviu DINU ,  Hugo GICQUEL

IPC: G06F3/041 ,  G06F3/044

Abstract: An electronic device includes a plurality of charge-to-current converters each including a first NMOS transistor having a source coupled to a sense line, a first capacitor between a gate and source of the first NMOS transistor so that a transient component of noise from the sense line is applied to both, a first PMOS transistor having a source coupled to the sense line, a second capacitor between a gate and source of the first PMOS transistor so the transient component of the noise is applied to both, a first current mirror having an input coupled to a drain of the first NMOS transistor and an output coupled to an output for that charge to current converter, and a second current mirror having an input coupled to a drain of the first PMOS transistor and an output coupled to the output for that charge to current converter.

公开(公告)号：US20150256329A1

公开(公告)日：2015-09-10

申请号：US14199210

申请日：2014-03-06

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Chee Weng CHEONG ,  Leonard Liviu DINU ,  Dianbo GUO ,  Kien Beng TAN

IPC: H04L7/033 ,  G06F3/0354 ,  H04L7/00 ,  G06F3/041

CPC classification number: G06F3/03545 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0416 ,  G06F2203/0384 ,  H04L2027/0097

Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals. Further, the detection window duration and start times may be adjusted based on previously detected (or undetected) synchronization signals in order to compensate for noise overshadowing synchronization signals.

Abstract translation: 一种用于同步彼此通信的两个设备的系统和方法。 当要建立两个设备之间的通信时，可以调用同步过程。 在一个实施例中，第一设备可以启动发送具有上升沿和下降沿对的同步信号。 第二设备可以包括被配置为接收同步信号的控制器。 然而，噪声可能会阻碍控制器正确接收和/或解释同步信号的能力。 噪声可能导致检测部件误检测噪声作为同步信号，或者可能导致检测部件错过实际同步信号的检测。 可以使用窗口生成器来生成用于控制器的比较窗口以检测同步信号。 此外，可以基于先前检测到的（或未检测到的）同步信号来调整检测窗口持续时间和开始时间，以便补偿遮挡同步信号的噪声。