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    ANALOG SELF CAPACITANCE SENSING FRONT END UTILIZING CURRENT CONVEYORS
    211.
    发明申请
    ANALOG SELF CAPACITANCE SENSING FRONT END UTILIZING CURRENT CONVEYORS 审中-公开

    公开(公告)号：US20180157367A1

    公开(公告)日：2018-06-07

    申请号：US15368203

    申请日：2016-12-02

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Liviu Dinu

    IPC: G06F3/041 ,  G06F3/044

    CPC classification number: G06F3/0416 ,  G06F3/044

    Abstract: A touch screen controller includes a current conveyor having first and second inputs and first and second outputs, the first input being coupled to a self capacitance sense line. A driver is coupled to the second input and periodically drives the second input between high and low voltages. The current conveyor forces its first input to a same voltage as its second input, and replicates a current flowing into its first input at its first and second outputs, such that when the driver drives the second input to the high voltage, a first current flows from the first input into the self capacitance sense line, and when the driver drives the second input to the low voltage, a second current flows from the self capacitance sense line into the first input, and the current conveyor replicates the second current to its first and second outputs.

    MICROELECTRONIC FLUID DETECTOR
    212.
    发明申请
    MICROELECTRONIC FLUID DETECTOR 审中-公开

    公开(公告)号：US20180106744A1

    公开(公告)日：2018-04-19

    申请号：US15833806

    申请日：2017-12-06

    Applicant: STMicroelectronics Asia Pacific Pte Ltd.

    Inventor： Archit Giridhar ,  Teck Khim Neo

    IPC: G01N27/07 ,  G01F22/00

    Abstract: A resistive microelectronic fluid sensor implemented as an integrated voltage divider circuit can sense the presence of a fluid within a fluid reservoir, identify the fluid, and monitor fluid temperature or volume. Such a sensor has biomedical, industrial, and consumer product applications. After fluid detection, the fluid can be expelled from the reservoir and replenished with a fresh supply of fluid. A depression at the bottom of the sample reservoir allows a residual fluid to remain undetected so as not to skew the measurements. Electrodes can sense variations in the resistivity of the fluid, indicating a change in the fluid chemical composition, volume, or temperature. Such fluctuations that can be electrically sensed by the voltage divider circuit can be used as a thermal actuator to trigger ejection of all or part of the fluid sample.

    FOLDED DIVIDER ARCHITECTURE
    214.
    发明申请
    FOLDED DIVIDER ARCHITECTURE 审中-公开

    公开(公告)号：US20180083606A1

    公开(公告)日：2018-03-22

    申请号：US15811223

    申请日：2017-11-13

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Beng-Heng Goh

    IPC: H03K5/15 ,  H03L7/183 ,  H03L7/197

    CPC classification number: H03K5/15033 ,  H03K23/502 ,  H03L7/16 ,  H03L7/183 ,  H03L7/1974

    Abstract: A circuit includes a counter circuit, a logic circuit, and a clock divider. The counter circuit includes a clock divider counter to be loaded with most significant bits of a divider value, and decremented at a same edge of each pulse of a clock signal. The logic circuit compares a value contained in the divider counter to a reference value and generates an end count signal as a function of the value contained in the divider counter matching the reference value, and transitions a toggle signal at a same edge of each pulse of the end count signal. The clock divider counter is reloaded with the most significant bits of the divider value as a function of the end count signal. The clock divider generates a divided version of the clock signal as a function of the toggle signal.

    Capacitive discharge circuit for touch sensitive screen
    215.
    发明授权
    Capacitive discharge circuit for touch sensitive screen 有权

    公开(公告)号：US09870113B2

    公开(公告)日：2018-01-16

    申请号：US15679771

    申请日：2017-08-17

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Chee Weng Cheong ,  Dianbo Guo ,  Kien Beng Tan ,  Yannick Guedon

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/041 ,  G06F3/0418

    Abstract: A capacitive discharge circuit includes a line having a capacitance, a switched capacitor circuit including a capacitor, a switched circuit coupled to the line, and a voltage regulator coupled between the switched capacitor circuit and the switched circuit. A controller operates the switched capacitor circuit and switched circuit to in a first phase, charge the capacitor by coupling the capacitor between a common mode and a power supply, and in a second phase, discharge the capacitor by coupling the voltage regulator in series with the capacitor between the power supply node a ground. The controller is also configured to in a third phase, charge the capacitor by coupling the capacitor between the common mode and the power supply, and in a fourth phase, share charge between the line and the capacitor by coupling the voltage regulator and the capacitor in series between the line and the ground.

    CAPACITIVE TOUCH PRESSURE SENSOR CONSTRUCTED FROM FLEXIBLE SUBSTRATE
    217.
    发明申请
    CAPACITIVE TOUCH PRESSURE SENSOR CONSTRUCTED FROM FLEXIBLE SUBSTRATE 审中-公开

    公开(公告)号：US20170371442A1

    公开(公告)日：2017-12-28

    申请号：US15191714

    申请日：2016-06-24

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  John Serge Georges Nankoo

    IPC: G06F3/044

    CPC classification number: G06F3/044 ,  G06F2203/04102

    Abstract: An electronic device includes a flexible substrate. The flexible substrate includes a first portion having a plurality of first conductive lines formed thereon, a second portion having a plurality of second conductive lines formed thereon, and an intermediate portion mechanically coupling the first portion to the second portion. The intermediate portion is configured to permit folding so that the first and second portions can be arranged back-to-back or face-to-face such that plurality of the second conductive lines and plurality of first conductive lines are oriented so as to cross one another to thereby form a capacitive sensing panel. A single connector is mechanically coupled to the first portion or the second portion, and electrically coupled to the first portion and the second portion but not electrically coupling the first portion to the second portion.

    FOLDED DIVIDER ARCHITECTURE
    219.
    发明申请
    FOLDED DIVIDER ARCHITECTURE 有权

    公开(公告)号：US20170346470A1

    公开(公告)日：2017-11-30

    申请号：US15167216

    申请日：2016-05-27

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Beng-Heng Goh

    IPC: H03K5/15 ,  H03L7/197 ,  H03L7/183

    CPC classification number: H03K5/15033 ,  H03K23/502 ,  H03L7/16 ,  H03L7/183 ,  H03L7/1974

    Abstract: A circuit includes a counter circuit, a logic circuit, and a clock divider. The counter circuit includes a clock divider counter to be loaded with most significant bits of a divider value, and decremented at a same edge of each pulse of a clock signal. The logic circuit compares a value contained in the divider counter to a reference value and generates an end count signal as a function of the value contained in the divider counter matching the reference value, and transitions a toggle signal at a same edge of each pulse of the end count signal. The clock divider counter is reloaded with the most significant bits of the divider value as a function of the end count signal. The clock divider generates a divided version of the clock signal as a function of the toggle signal.

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