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公开(公告)号：US11070754B1
公开(公告)日：2021-07-20
申请号：US16828423
申请日：2020-03-24
Inventor： Hongliang Zhang , Lookah Chua , Celine Mas , Wai Yin Hnin
Abstract: In an embodiment, an image sensor includes: first and second voltage rails; first and second regulators configured to generate first and second regulated voltage at the first and second voltage rails, respectively; and a plurality of pixels coupled to the first and second voltage rails. Each pixel includes: first and second transistor coupled first and second storage capacitor, respectively. A third transistor is coupled between a control terminal of the first transistor and the first or second voltage rails. The third transistor is configured to limit a slew rate of current flowing between the control terminal of the second transistor and the first or second voltage rails to a first slew rate when the image sensor operates in global shutter mode, and to a second slew rate when the image sensor operates in rolling mode, the first slew rate being smaller than the second slew rate.
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公开(公告)号：US10996699B2
公开(公告)日：2021-05-04
申请号：US16525696
申请日：2019-07-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Qing Liu , Yannick Guedon
Abstract: A low drop-out (LDO) voltage regulator circuit includes a power transistor having a control terminal configured to receive a control signal and an output terminal coupled to an output node. A current regulation loop senses current flowing through the power transistor and modulates the control signal to cause the power transistor to output a constant current to the output node. A voltage regulation loop senses voltage at the output node and modulates the control signal to cause the power transistor to deliver current to the output node so that an output voltage at the output node is regulated. The current regulation loop includes a bipolar transistor connected to the control terminal of the power transistor, where a base terminal of the bipolar transistor is driven by a signal dependent on a difference between the sensed current flowing through the power transistor and a reference.
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公开(公告)号：US10916939B2
公开(公告)日：2021-02-09
申请号：US16149614
申请日：2018-10-02
Inventor： Romain Pichon , Yannick Hague , Sean Choi
Abstract: Transient overvoltage suppression is provided by discharging through a Metal Oxide Varistor (MOV) and Silicon Controlled Rectifier (SCR) which are connected in series between power supply lines. The SCR has a gate that receives a trigger signal generated by a triggering circuit coupled to the power supply lines. A trigger voltage of the triggering circuit is set by a Transil™ avalanche diode.
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公开(公告)号：US20210034087A1
公开(公告)日：2021-02-04
申请号：US16525696
申请日：2019-07-30
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Qing LIU , Yannick GUEDON
Abstract: A low drop-out (LDO) voltage regulator circuit includes a power transistor having a control terminal configured to receive a control signal and an output terminal coupled to an output node. A current regulation loop senses current flowing through the power transistor and modulates the control signal to cause the power transistor to output a constant current to the output node. A voltage regulation loop senses voltage at the output node and modulates the control signal to cause the power transistor to deliver current to the output node so that an output voltage at the output node is regulated. The current regulation loop includes a bipolar transistor connected to the control terminal of the power transistor, where a base terminal of the bipolar transistor is driven by a signal dependent on a difference between the sensed current flowing through the power transistor and a reference.
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公开(公告)号：US10852879B2
公开(公告)日：2020-12-01
申请号：US16223428
申请日：2018-12-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Manivannan Ponnarasu , Mythreyi Nagarajan
IPC: G06F3/041 , G06F3/0354 , G06F3/044
Abstract: A touch screen controller identifies an island in a matrix of acquired touch data values. A first sharpness of the island is calculated and a second sharpness of the island is calculated if the calculated first sharpness is greater than a sharpness threshold. A dynamic strength threshold is then determined as a function of the second sharpness if a variance of the island is greater than a dynamic variance threshold. A determination is then made that the identified island is a valid stylus island if a peak strength of the island is greater than the dynamic strength threshold.
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Patent Agency Ranking
公开(公告)号：US10742197B2
公开(公告)日：2020-08-11
申请号：US16200975
申请日：2018-11-27
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Li Cai , Yannick Guedon , Hugo Gicquel
Abstract: 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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公开(公告)号：US10739291B2
公开(公告)日：2020-08-11
申请号：US15833806
申请日：2017-12-06
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Archit Giridhar , Teck Khim Neo
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.
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公开(公告)号：US10712862B1
公开(公告)日：2020-07-14
申请号：US16361924
申请日：2019-03-22
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Abstract: An electronic device includes a foldable touch screen having first and second portions and a bendable intermediate portion connecting the first portion to the second portion. The foldable touch screen has a capacitive touch matrix therein. A touch screen controller acquires touch data from the capacitive touch matrix, calculates strength values of nodes of the capacitive touch matrix based upon the acquired touch data, calculates a first value, the first value being an average strength of nodes of the capacitive touch matrix located in the first portion of the foldable touch screen, calculates a second value, the second value being an average strength of nodes of the capacitive touch matrix located in the second portion of the foldable touch screen, and determines that the foldable touch screen is in a closed position based upon the first value and the second value both being greater than a first given strength value.
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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
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Li CAI , Yannick GUEDON , Hugo GICQUEL
Abstract: 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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公开(公告)号：US10585528B2
公开(公告)日：2020-03-10
申请号：US16014664
申请日：2018-06-21
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Hugo Gicquel , Eng Jye Ng
Abstract: 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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