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公开(公告)号：US10797686B1
公开(公告)日：2020-10-06
申请号：US16557866
申请日：2019-08-30
Applicant: Microchip Technology Inc.
Inventor： Morten Terstrup , Thomas Joergensen
Abstract: A phase predictor to accurately detect and predict the phase relationship between two clocks running at different frequencies. The phase relationship can be used to record the transmission and reception times of Ethernet frames transmitted over a transmission medium with very high accuracy.
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公开(公告)号：US10149357B2
公开(公告)日：2018-12-04
申请号：US15437081
申请日：2017-02-20
Applicant: Microchip Technology Inc.
Inventor： Scott Lynch
IPC: H05B33/08
Abstract: Employed within an LED driver operating from the AC power line, the invention controls both input current and output power. With this regulation circuit, input current appears purely resistive, precisely tracking the input voltage waveshape. At the same time, it provides good line regulation and inherent phase dimmer compatibility, requiring no special circuitry to detect and handle a dimmer.
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公开(公告)号：US09883554B2
公开(公告)日：2018-01-30
申请号：US15276253
申请日：2016-09-26
Applicant: Microchip Technology Incorporated
Inventor： Scott Lynch
IPC: H05B33/08
CPC classification number: H05B33/0812 , H05B33/083
Abstract: A sequential linear LED driver circuit is provided. The sequential linear LED driver circuit may include a plurality of current sinks, wherein each of the plurality of current sinks is configured to be coupled to a segment of a string of light-emitting diodes (LEDs), and a voltage divider that generates a plurality of reference voltages, wherein each of the plurality of reference voltages is applied to a respective current sink of the plurality of current sinks. The output of each current sink of the plurality of current sinks may be connected at a summing node.
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公开(公告)号：US09698689B2
公开(公告)日：2017-07-04
申请号：US15088789
申请日：2016-04-01
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik
CPC classification number: H02M3/158 , H02M1/34 , H02M2001/0009
Abstract: A zero-voltage switching buck converter circuit and control circuit are provided. The buck converter circuit may include a first inductor, a smoothing capacitor coupled to the first inductor, a rectifier diode coupled in parallel with the first inductor and the smoothing capacitor, a control switch coupled to the first inductor, a control circuit configured to turn the control switch off and on repeatedly at a high frequency rate; and a snubber network coupled to the first inductor and the control circuit. The snubber network may include second and third inductors connected in series, wherein one terminal of the first inductor is connected to a node connecting the second and third inductors, and an auxiliary switch connected to the control circuit. A first terminal of the second inductor that is not connected to the node may be coupled to the control switch, and a first terminal of the third inductor that is not connected to the node may be coupled to the auxiliary switch.
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公开(公告)号：US09661702B2
公开(公告)日：2017-05-23
申请号：US15051335
申请日：2016-02-23
Applicant: Microchip Technology Incorporated
Inventor： Alexander Mednik , Rohit Tirumala
IPC: H05B33/08
CPC classification number: H05B33/0815 , H05B33/0845 , Y02B20/345 , Y02B20/347
Abstract: A constant-current controller with square wave input current shaping for driving a series of light emitting diodes (LEDs) is provided. The controller may include a sample and hold circuit that samples a current sense voltage, a first multiplier circuit that multiplies an output of the sample and hold circuit, an error detector circuit that compares an output of the multiplier circuit with a reference voltage, an error amplifier that amplifies an output of the error detector circuit, a second multiplier circuit that multiplies an output of the error amplifier by a coefficient, and an output circuit that outputs a pulse-width modulated control signal based on an output of the second multiplier circuit. The coefficient may vary depending on whether the constant-current LED driver controller is used with a boost converter or a buck-boost converter.
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Patent Agency Ranking
56.发明授权Circuit and method for active crosstalk reduction in multiple-channel power supply controllers 有权多通道电源控制器中主动串扰降低的电路和方法公开(公告)号：US09590613B2
公开(公告)日：2017-03-07
申请号：US14742571
申请日：2015-06-17
Applicant: Microchip Technology Inc.
Inventor： Alexander Mednik , Rohit Tirumala , Marc Tan , Simon Krugly
CPC classification number: H03K17/162 , H02M1/08 , H02M3/1584 , H02M2003/1586
Abstract: A comparator sense input is disconnected from a current sense resistor for the duration of a switching transition in an adjacent channel(s). Instead, the sense input receives a signal of the magnitude and the slew rate sampled prior to the transition.
Abstract translation: 在相邻信道中的切换转换的持续时间内，比较器检测输入与电流检测电阻断开。 相反，感测输入接收在转换之前采样的幅度和转换速率的信号。
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公开(公告)号：US09584009B2
公开(公告)日：2017-02-28
申请号：US13938229
申请日：2013-07-10
Applicant: Supertex, Inc.
Inventor： Marc Tan
CPC classification number: H02M1/4225 , H02M2001/0009 , Y02B70/126
Abstract: The invention generally relates to the field of power factor correction and specifically to generation of a reference waveform which is proportional to line voltage and is controllable in amplitude.
Abstract translation: 本发明一般涉及功率因数校正领域，特别涉及一种与线路电压成比例且可在幅度上控制的参考波形的产生。
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公开(公告)号：US09448575B2
公开(公告)日：2016-09-20
申请号：US14018281
申请日：2013-09-04
Applicant: Supertex, Inc.
Inventor： Tony Yuan Yen Mai , Isaac Terasuth Ko
Abstract: An adjustable shunt regulator circuit has two current paths in parallel, with each current path having a bipolar transistor therein with the bases of the bipolar transistors of the two current paths connected in common. One of the current paths has a high impedance node. A MOS transistor has a gate connected to the high impedance node, and a source and a drain. A resistor divide circuit is connected in parallel to the source and drain of the MOS transistor and provides the output of the regulator circuit. The resistor divide circuit has a first resistor connected in series with a second resistor at a first node. A feedback connects the first node to the bases of the bipolar transistors connected in common of the two current paths.
Abstract translation: 可调并联调节器电路具有并联的两个电流路径，每个电流路径具有双极晶体管，其中两个电流路径的双极晶体管的基极共同连接。 其中一条电流路径具有高阻抗节点。 MOS晶体管具有连接到高阻抗节点的栅极以及源极和漏极。 电阻分压电路与MOS晶体管的源极和漏极并联连接，并提供稳压电路的输出。 电阻分压电路具有与第一节点处的第二电阻器串联连接的第一电阻器。 反馈将第一节点连接到两个电流路径共同连接的双极晶体管的基极。
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公开(公告)号：US09100008B2
公开(公告)日：2015-08-04
申请号：US13526092
申请日：2012-06-18
Applicant: Benedict C. K. Choy , James T. Walker , Ming-Yuan Yeh
Inventor： Benedict C. K. Choy , James T. Walker , Ming-Yuan Yeh
CPC classification number: H03K17/063 , H03K17/163
Abstract: Systems and methods are disclosed for operating a highly linearized resistance for a switch through use of a bootstrapped features. In one exemplary implementation, there is provided a method and system that implements a method for operating a circuit configured to provide a highly linearized resistance including receiving a signal via a bootstrapped switch, coupling the received signal to a gate if the received signal is high, receiving a signal via a switch control input coupled to a high impedance element. Moreover, the method includes coupling the high impedance element to the gate and turning off the switch via a gate turn off when the gate turn off pulls the gate low.
Abstract translation: 公开了用于通过使用自举特征来操作用于开关的高度线性化电阻的系统和方法。 在一个示例性实施方式中，提供了一种方法和系统，其实现用于操作被配置为提供高度线性化电阻的电路的方法，所述电路包括经由自举交换器接收信号，如果接收信号为高，则将接收信号耦合到门， 通过耦合到高阻抗元件的开关控制输入来接收信号。 此外，该方法包括将高阻抗元件耦合到栅极并且当栅极关断将栅极拉低时通过栅极截止来关断开关。
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公开(公告)号：US20110255346A1
公开(公告)日：2011-10-20
申请号：US13172599
申请日：2011-06-29
Applicant: Hieu Van Tran , Sang T. Nguyen , Anh Ly , Hung Q. Nguyen
Inventor： Hieu Van Tran , Sang T. Nguyen , Anh Ly , Hung Q. Nguyen
Abstract: Various circuits include MOS transistors that have a bulk voltage terminal for receiving a bulk voltage that is different from a supply voltage and ground. The bulk voltage may be selectively set so that some MOS transistors have a bulk voltage set to the supply voltage or ground and other MOS transistors have a bulk voltage that is different. The bulk voltage may be set to forward or reverse bias pn junctions in the MOS transistor. The various circuits include comparators, operational amplifiers, sensing circuits, decoding circuits and the other circuits. The circuits may be included in a memory system.
Abstract translation: 各种电路包括具有用于接收不同于电源电压和接地的体电压的体电压端子的MOS晶体管。 可以选择性地设置体电压，使得一些MOS晶体管具有设置为电源电压或地的体电压，并且其它MOS晶体管具有不同的体电压。 体电压可以被设置为MOS晶体管中的正向或反向偏置pn结。 各种电路包括比较器，运算放大器，感测电路，解码电路和其它电路。 电路可以包括在存储器系统中。
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