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公开(公告)号：US11018577B2
公开(公告)日：2021-05-25
申请号：US16571680
申请日：2019-09-16
发明人： Lei Huang
摘要： A charge pump circuit generates a charge pump voltage that powers a bias circuit. The bias circuit generates a reference current and generates switch currents from the reference current. Gate-source voltages are generated from the switch currents and applied to switching components of switch circuits to connect two nodes. The gate-source voltages can be generated in the bias circuit and provided to the switch circuits. The gate-source voltages can also be generated in the switch circuits.
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公开(公告)号：US10270438B2
公开(公告)日：2019-04-23
申请号：US14793382
申请日：2015-07-07
发明人： Lei Huang , Na Meng , Kenneth P. Snowdon
IPC分类号： H02H3/20 , H02H9/04 , H03K17/687
摘要： A switch device includes a common node that is connected to end nodes, such as that of computer interface ports. The switch device includes several switch circuits that can be connected in series to form a switch path between the common node and an end node. A switch circuit can include a main switch, such as a transistor that can be configured to withstand a positive or negative voltage surge by automatically changing the connection of its bulk.
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3.发明授权公开(公告)号：US10056753B2
公开(公告)日：2018-08-21
申请号：US14622320
申请日：2015-02-13
发明人： Peng Zhu , Lei Huang , Yongliang Li
IPC分类号： H02H9/04
CPC分类号： H02H9/046
摘要： This document discusses, among other things, an electro-static discharge (EDS) filtering circuit and method, a reset circuit, and an electronic device. The ESD filtering circuit comprises a first current dividing circuit and a second current dividing circuit which respectively share a current of a first power source signal and aggregate the shared currents to form a second power source signal upon filtering, wherein a voltage drop of the first current dividing circuit is constant and the second current dividing circuit is a pure resistor element circuit.
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4.发明申请公开(公告)号：US20140354261A1
公开(公告)日：2014-12-04
申请号：US14291609
申请日：2014-05-30
IPC分类号： G01R23/10
CPC分类号： G01R23/10
摘要： A method, circuit, and integrated circuit for detecting resonance frequency is disclosed in which a first operational amplifier circuit receives an input signal and provides an output signal for a resonance circuit to store energy, a zero crossing comparator circuit samples a discharge current of the resonance circuit and transforms the sampled current into a sampled voltage and outputs a square signal to a digital signal processor based on the sampled voltage, and the digital signal processor obtains a resonance frequency based on the square signal.
摘要翻译： 公开了一种用于检测谐振频率的方法，电路和集成电路，其中第一运算放大器电路接收输入信号并提供用于谐振电路的输出信号以存储能量，零交叉比较器电路对谐振的放电电流进行采样 将采样电流转换成采样电压，并根据采样电压向数字信号处理器输出平方信号，数字信号处理器根据平方信号获得谐振频率。
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公开(公告)号：US10002061B2
公开(公告)日：2018-06-19
申请号：US15160085
申请日：2016-05-20
发明人： Jianli Chen , Weiming Sun , Emma Wang , Lei Huang
CPC分类号： G06F13/4282 , G06F13/385 , G06F13/4295 , G06F2213/0042
摘要： Systems and methods are disclosed, including a USB interface detector, a detection method, a USB connector, and an electronic device. The detection method may be applicable to the USB connector mounted in the electronic device. According to an operation mode of the electronic device, a first pin and a second pin in the USB interface can be pulled up or pulled down. After the pull up or the pull down, a voltage change at the first and second pins are detected. If the voltage changes cross a reference voltage, an instruction related to attachment or detachment with a second device can be provided.
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公开(公告)号：US09877104B2
公开(公告)日：2018-01-23
申请号：US14748066
申请日：2015-06-23
发明人： Lei Huang , Julie Stulz , Eric Li
IPC分类号： H04R3/00 , H03K17/16 , H03K17/687 , H03F1/30
CPC分类号： H04R3/00 , H03K17/166
摘要： An audio switch circuit includes negative feedback paths and a transistor that serves as a switching component. The negative feedback paths are turned ON to couple a source voltage and a drain voltage of the transistor to the gate of the transistor when the audio switch circuit is turned ON. The negative feedback paths reduce the slew rate of the gate-to-source voltage of the transistor, thereby slowing the turn-ON of the audio switch circuit to prevent or minimize unwanted audible noise. The negative feedback paths can be turned OFF after a period of time after the audio switch circuit is turned ON for improved total harmonic distortion.
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公开(公告)号：US09551742B2
公开(公告)日：2017-01-24
申请号：US13936331
申请日：2013-07-08
发明人： Lei Huang
IPC分类号： G01R31/26 , H03K17/082 , H01L27/02 , G01R19/165
CPC分类号： G01R31/2621 , G01R19/16519 , H01L27/0285 , H03K17/0822
摘要： An overcurrent detection circuit for a power switch comprises a sampling circuit and a comparing circuit. The sampling circuit is configured to perform current sampling on the power switch using a sampling Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) and an amplifier, convert a sample current into a sample voltage and transmit the sample voltage to the comparing circuit, and clamp operating voltages of the comparing circuit and of an output circuit of the amplifier by a serially connected clamping MOSFET. The comparing circuit is configured to compare the sample voltage with a reference voltage and to output a result of overcurrent detection.
摘要翻译： 用于电源开关的过电流检测电路包括采样电路和比较电路。 采样电路被配置为使用采样金属氧化物半导体场效应晶体管（MOSFET）和放大器对功率开关进行电流采样，将采样电流转换成采样电压并将采样电压传送到比较电路， 并通过串联钳位MOSFET钳位比较电路和放大器的输出电路的工作电压。 比较电路被配置为将采样电压与参考电压进行比较，并输出过电流检测的结果。
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公开(公告)号：US20160336932A1
公开(公告)日：2016-11-17
申请号：US15154245
申请日：2016-05-13
发明人： Lei Huang , Jianing Zhou , Zhaohong Li
IPC分类号： H03K5/24 , H03K3/3565
CPC分类号： H03K5/2472 , H03K5/2481
摘要： This document discusses, among other things, a voltage comparator, an integrated circuit, or a voltage comparison method having increased precision. The hysteresis comparator or the integrated circuit can include first and second input transistors, each having a gate configured to receive a respective first or second input voltage. A bias power source can generate a bias current to a first node by applying a voltage through a first resistor. The first node can be connected to a source of the first input transistor through a second resistor and to a source of the second input transistor through a third resistor. The first, second, and third resistors can include the same type of resistor, with the second and third resistors having different resistance values.
摘要翻译： 本文件尤其讨论了具有增加精度的电压比较器，集成电路或电压比较方法。 滞后比较器或集成电路可以包括第一和第二输入晶体管，每个具有被配置为接收相应的第一或第二输入电压的栅极。 偏置电源可以通过施加通过第一电阻器的电压而向第一节点产生偏置电流。 第一节点可以通过第二电阻器连接到第一输入晶体管的源极，并通过第三电阻器连接到第二输入晶体管的源极。 第一，第二和第三电阻器可以包括相同类型的电阻器，其中第二和第三电阻器具有不同的电阻值。
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9.发明授权公开(公告)号：US09413231B2
公开(公告)日：2016-08-09
申请号：US14722778
申请日：2015-05-27
发明人： Lei Huang
CPC分类号： H02M3/07 , G05F3/262 , G11C5/145 , H02M1/088 , H03K17/063 , H03K17/687
摘要： A charge pump circuit generates a charge pump voltage that powers a bias circuit. The bias circuit generates a reference current and generates switch currents from the reference current. Gate-source voltages are generated from the switch currents and applied to switching components of switch circuits to connect two nodes. The gate-source voltages can be generated in the bias circuit and provided to the switch circuits. The gate-source voltages can also be generated in the switch circuits.
摘要翻译： 电荷泵电路产生为偏置电路供电的电荷泵电压。 偏置电路产生参考电流，并从参考电流产生开关电流。 栅源电压由开关电流产生，并施加到开关电路的开关元件以连接两个节点。 栅源电压可以在偏置电路中产生并提供给开关电路。 栅极 - 源极电压也可以在开关电路中产生。
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公开(公告)号：US09350337B2
公开(公告)日：2016-05-24
申请号：US14734268
申请日：2015-06-09
发明人： Lei Huang , Yongliang Li
IPC分类号： H03K5/08
CPC分类号： H03K5/08
摘要： The disclosure provides a clamp circuit and a method for clamping voltage. The clamp circuit includes: a first switch control unit, connected with the high-potential terminal of the first stage output of a comparator and configured to clamp the voltage of the high-potential terminal to VGate1 when the voltage of the high-potential terminal is lower than a first pre-set value V1, and a second switch control unit, connected to the low-potential terminal of the first stage output of the comparator and configured to clamp the voltage of the low-potential terminal to VGate2 when the voltage of the low-potential terminal is higher than a second pre-set value V2, wherein the voltages of the first stage output of the comparator are between VGND and VCC. By the disclosure, the output voltage swings of the first stage of the comparator are limited, and thereby the processing speed of the comparator is improved.
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