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公开(公告)号：US11658593B2
公开(公告)日：2023-05-23
申请号：US17731884
申请日：2022-04-28
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis
IPC: H02P8/00 , H02P8/14 , G05B19/416
CPC classification number: H02P8/14 , G05B19/416 , G05B2219/33088 , G05B2219/43139
Abstract: Automated speed ramp control of stepper motor acceleration and deceleration using direct memory access (DMA) and core independent peripherals (CIPs) comprises a numerically controlled oscillator (NCO) controlled through direct memory access (DMA) transfers of prescale values used in combination with a clock oscillator to generate clock pulses that are a function of the clock oscillator frequency and the prescale values. This automates changing the frequency of the NCO, thereby controlling steeper motor speed, without requiring computer processing unit (CPU) overhead. The DMA module is enabled during a first number of clock pulses for step speed acceleration, disabled during a second number of clock pulses for normal operation at full step speed, and then re-enabled during a third number of clock pulses for step speed deceleration. A table in memory may store and provide a plurality of acceleration and deceleration prescale values for DMA transfers to the NCO.
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公开(公告)号：US11088666B2
公开(公告)日：2021-08-10
申请号：US16411449
申请日：2019-05-14
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis , Ward Brown , John Charais , Steve Kennelly , Dave Suda , Huamin Zhou , Clark Rogers , Mudit Gupta
IPC: H03F3/45
Abstract: An operational amplifier with totem pole connected output transistors having inputs coupled to multiplexers for selectable coupling of signals and voltage levels thereto. The high and low output transistors may be forced hard on or hard off in addition to normal coupling of signals thereto. The operation of the output transistors may be dynamically changed to pass only positive going signals, negative going signals, placed in a tristate high impedance state, hard connected to a supply voltage and/or hard connected to supply common return. A core independent peripheral (CIP) may also be coupled to the operational amplifier for dynamically changing the multiplexer inputs in real time, as can external control signals to a control circuit coupled to the multiplexers.
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公开(公告)号：US10474298B2
公开(公告)日：2019-11-12
申请号：US13831517
申请日：2013-03-14
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis
IPC: G06F3/044
Abstract: A liquid crystal display with integrated capacitive touch sensors has an LCD display with at least one alphanumerical or graphic symbol, and at least one capacitive touch sensor arranged above a display layer or within transparent layers of the LCD display forming the alphanumerical or graphical symbol.
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公开(公告)号：US09189940B2
公开(公告)日：2015-11-17
申请号：US13667269
申请日：2012-11-02
Applicant: Microchip Technology Incorporated
Inventor： Benjamin T. Cooke , Joseph Julicher , Keith Edwin Curtis
CPC classification number: G08B17/11 , G01N27/66 , G01R27/2605
Abstract: A smoke detection sensor ion chamber has a capacitance and a change in the permittivity of that capacitance dielectric (ionized air in the chamber) may be used to detect the presence of smoke therein. Smoke from typical fires is mainly composed of unburned carbon that has diffused in the surrounding air and rises with the heat of the fire. The permittivity of the carbon particles is about 10 to 15 times the permittivity of clean air. The addition of the carbon particles into the air in the ion chamber changes in the permittivity thereof that is large enough to measure by measuring a change in capacitance of the ion chamber.
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公开(公告)号：US09176088B2
公开(公告)日：2015-11-03
申请号：US13667196
申请日：2012-11-02
Applicant: Microchip Technology Incorporated
Inventor： Benjamin T. Cooke , Joseph Julicher , Keith Edwin Curtis
CPC classification number: G01N27/221 , G01N27/66 , G01R27/2605 , G08B17/11
Abstract: A smoke detection sensor ion chamber has a capacitance and a change in the permittivity of that capacitance dielectric (ionized air in the chamber) may be used to detect the presence of smoke therein. Smoke from typical fires is mainly composed of unburned carbon that has diffused in the surrounding air and rises with the heat of the fire. The permittivity of the carbon particles is about 10 to 15 times the permittivity of clean air. The addition of the carbon particles into the air in the ion chamber changes in the permittivity thereof that is large enough to measure by measuring a change in capacitance of the ion chamber.
Abstract translation: 烟雾检测传感器离子室具有电容并且可以使用该电容电介质（室中的电离空气）的介电常数的变化来检测其中的烟雾的存在。 典型火灾中的烟雾主要由在周围空气中扩散并随火的升高而升高的未燃碳组成。 碳颗粒的介电常数为清洁空气介电常数的约10至15倍。 将离子室中的碳颗粒加入到空气中，通过测量离子室的电容变化来测量介电常数，其电容率变大。
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Patent Agency Ranking
公开(公告)号：US20150301663A1
公开(公告)日：2015-10-22
申请号：US14254127
申请日：2014-04-16
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis
IPC: G06F3/041 , G02F1/1333
CPC classification number: G06F3/0412 , G02F1/133308 , G06F3/0416 , G06F3/044
Abstract: An integrated circuit device has a touch controller comprising at least one input, a liquid crystal display (LCD) controller comprising a plurality of outputs, an external interface comprising a plurality of external pins, and a multiplexer operable in a first mode to connect said plurality of external pins with said plurality of outputs of the LCD controller and in a second mode to connect at least one of said plurality of external pins with said touch controller.
Abstract translation: 集成电路装置具有包括至少一个输入的触摸控制器，包括多个输出的液晶显示器（LCD）控制器，包括多个外部引脚的外部接口和可在第一模式下操作以将所述多个 具有所述LCD控制器的所述多个输出的外部引脚，并且处于第二模式，以将所述多个外部引脚中的至少一个与所述触摸控制器连接。
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公开(公告)号：US09144041B2
公开(公告)日：2015-09-22
申请号：US13693635
申请日：2012-12-04
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis , Yann LeFaou , Fanie Duvenhage
IPC: H04W52/52 , H04B1/3827 , H04W52/28
CPC classification number: H04W52/52 , H04B1/3838 , H04W52/283
Abstract: A combination of capacitive, mutual capacitive, and inductive proximity and touch sensing is used to detect the presence and nature of nearby objects to a wireless device. When the proximity of metal or a user is sensed the output power of a Wi-Fi module in the device is reduced so as to prevent harm to the user and/or the Wi-Fi transmitter amplifier circuits. Inductive sensors located at the four corners of the wireless device are used to detect metal, and capacitive sensors are used to detect a capacitance change or shift due to the presence of a user's hand, body or metal. In addition, the capacitive sensors may be located at the four corners of the device and can measure changes in the mutual capacitance coupling between these capacitive sensors.
Abstract translation: 使用电容式，互电容式和电感式接近式和触摸感测的组合来检测附近对象到无线设备的存在和性质。 当感测到金属或用户的接近度时，设备中的Wi-Fi模块的输出功率被降低，以防止对用户和/或Wi-Fi发射机放大器电路的危害。 位于无线设备四角的感应传感器用于检测金属，电容传感器用于检测由于用户的手，身体或金属的存在而导致的电容变化或偏移。 此外，电容传感器可以位于器件的四个角，并且可以测量这些电容式传感器之间的互电容耦合的变化。
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公开(公告)号：US20140267138A1
公开(公告)日：2014-09-18
申请号：US13831517
申请日：2013-03-14
Applicant: MICROCHIP TECHNOLOGY INCORPORATED
Inventor： Keith Edwin Curtis
IPC: G06F3/044
CPC classification number: G06F3/044 , G02F1/13338 , G02F1/134327 , G06F3/0488
Abstract: A liquid crystal display with integrated capacitive touch sensors has an LCD display with at least one alphanumerical or graphic symbol, and at least one capacitive touch sensor arranged above a display layer or within transparent layers of the LCD display forming the alphanumerical or graphical symbol.
Abstract translation: 具有集成电容式触摸传感器的液晶显示器具有至少一个字母数字或图形符号的LCD显示器，以及布置在显示层上方或LCD平板显示器的透明层中的至少一个电容式触摸传感器，形成字母数字或图形符号。
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公开(公告)号：US20130155010A1
公开(公告)日：2013-06-20
申请号：US13693557
申请日：2012-12-04
Applicant: MICROCHIP TECHNOLOGY INCORPORATED
Inventor： Keith Edwin Curtis , Fanie Duvenhage
IPC: G06F3/044
CPC classification number: G06F3/044 , G06F3/017 , G06F3/048 , G06F2203/04108
Abstract: A plurality of capacitive proximity sensors on a substantially horizontal plane and in combination with a microcontroller are used to detect user gestures for Page Up/Down, Zoom In/Out, Move Up/Down/Right/Left, Rotation, etc., commands to a video display. The microcontroller is adapted to interpret the capacitive changes of the plurality of capacitive proximity sensors caused by the user gestures, and generate control signals based upon these gestures to control the visual content of the video display.
Abstract translation: 在大致水平面上并与微控制器结合使用的多个电容式接近传感器用于检测用户向上/向下，放大/缩小，上移/下降/向右/向左，向上/向上转动等的命令， 视频显示。 微控制器适于解释由用户手势引起的多个电容式接近传感器的电容变化，并且基于这些手势产生控制信号以控制视频显示的视觉内容。
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公开(公告)号：US20220329182A1
公开(公告)日：2022-10-13
申请号：US17731884
申请日：2022-04-28
Applicant: Microchip Technology Incorporated
Inventor： Keith Edwin Curtis
IPC: H02P8/14 , G05B19/416
Abstract: Automated speed ramp control of stepper motor acceleration and deceleration using direct memory access (DMA) and core independent peripherals (CIPs) comprises a numerically controlled oscillator (NCO) controlled through direct memory access (DMA) transfers of prescale values used in combination with a clock oscillator to generate clock pulses that are a function of the clock oscillator frequency and the prescale values. This automates changing the frequency of the NCO, thereby controlling steeper motor speed, without requiring computer processing unit (CPU) overhead. The DMA module is enabled during a first number of clock pulses for step speed acceleration, disabled during a second number of clock pulses for normal operation at full step speed, and then re-enabled during a third number of clock pulses for step speed deceleration. A table in memory may store and provide a plurality of acceleration and deceleration prescale values for DMA transfers to the NCO.
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