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公开(公告)号：US20180300016A1
公开(公告)日：2018-10-18
申请号：US16014664
申请日：2018-06-21
发明人： Hugo GICQUEL , Eng Jye NG
CPC分类号： G06F3/0418 , G06F3/0412 , G06F3/0416 , G06F3/044 , G06F2203/04101 , G06F2203/04104
摘要： 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.
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公开(公告)号：US20200169221A1
公开(公告)日：2020-05-28
申请号：US16200975
申请日：2018-11-27
发明人： Li CAI , Yannick GUEDON , Hugo GICQUEL
摘要： An oscillator circuit includes a first current generator circuit that generates a current complementary to absolute temperature and a second current generator that generates a current proportional to absolute temperature. A temperature slope control circuit adjusts slopes of the current complementary to absolute temperature and the current proportional to absolute temperature in a complementary fashion and adds the current complementary to absolute temperature to the current proportional to absolute temperature after slope control to produce a temperature independent current. A current control circuit adjusts magnitude of the temperature independent current to produce a magnitude adjusted temperature independent current. A current controlled oscillator generates an output signal as a function of the magnitude adjusted temperature independent current.
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3.发明申请公开(公告)号：US20200174597A1
公开(公告)日：2020-06-04
申请号：US16675950
申请日：2019-11-06
发明人： Abhishek SINGH , Hugo GICQUEL
摘要： Disclosed herein is a circuit including a driver circuit applying a received drive signal to a capacitive sensing line of a capacitive touch panel as a boosted drive signal, the driver circuit powered by a boosted supply voltage. A charge pump circuit receives an input supply voltage and output the boosted supply voltage, the charge pump circuit including a voltage sensing circuit to sense the boosted supply voltage and a comparison circuit to compare the sensed boosted supply voltage to a threshold and produce a comparison signal. A control circuit determines a ratio of a pulse width of the comparison signal to the drive signal, and tunes operation of the charge pump circuit to drive the ratio to match a performance threshold.
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公开(公告)号：US20200153399A1
公开(公告)日：2020-05-14
申请号：US16184778
申请日：2018-11-08
IPC分类号： H03F3/45
摘要： A feedback stage for an integrator circuit is provided. The integrator receives a first input current and a second input current that include respective measurement current components and an offset current component. The integrator integrates the first input current and the second input current and generates a first output voltage and a second output voltage. The feedback stage including a transconductance amplifier detects a difference between the first output voltage and the second output voltage and sinks or sources a first output current and a second output current based on the difference between the first output voltage and the second output voltage. The first output current is additively combined with the first input current and the second output current is additively combined with the second input current to mitigate the offset current component at an input of the integrator.
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公开(公告)号：US20200042140A1
公开(公告)日：2020-02-06
申请号：US16653172
申请日：2019-10-15
发明人： Leonard Liviu DINU , Hugo GICQUEL
摘要： 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.
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公开(公告)号：US20180004349A1
公开(公告)日：2018-01-04
申请号：US15199792
申请日：2016-06-30
发明人： Hugo GICQUEL , EngJye NG
CPC分类号： G06F3/0418 , G06F3/0412 , G06F3/0416 , G06F3/044 , G06F2203/04101 , G06F2203/04104
摘要： 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.
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