公开(公告)号：US20200350901A1

公开(公告)日：2020-11-05

申请号：US16933983

申请日：2020-07-20

Applicant: Microchip Technology Inc

Inventor： Isaac Ko ,  KA WAI HO ,  WAN TIM CHAN ,  JIMES LEI

IPC: H03K17/06 ,  A61B8/00 ,  H03K17/693

Abstract: Described herein are multiple designs for an improved analog switch for use in transmitting high voltage signals without using high voltage power supplies for the switch. The analog switches are able to pass and block input signals in the approximate range of −100 V to +100 V. The use of translinear loops and a bootstrap configuration results in a constant on-resistance of the symmetrical switches and matches the conductance of each analog switch to the transconductance of an NMOS transistor, which can be easily stabilized with a constant gm biasing scheme. In certain embodiments, a shunt termination (T-switch) configuration is used for better off-isolation, and each of the symmetrical switches has its own translinear loop and thus flexibility of on-resistance and termination voltage.

公开(公告)号：US20200348738A1

公开(公告)日：2020-11-05

申请号：US16446498

申请日：2019-06-19

Applicant: Microchip Technology Inc.

Inventor： Renato Colombo ,  Cesare Bocchiola

IPC: G06F1/26 ,  H02M7/493 ,  H02M5/10

Abstract: A reverse power feeding (RPF) power supply unit (PSU) for remote network distribution point unit (DPU) that is reverse powered from multiple customer premise equipments (CPEs). A plurality of power converters, each having a different primary winding and sharing a common secondary winding of a transformer at the PSU, wherein only one of the power converters is operated at a time to provide a desired output voltage.

公开(公告)号：US20200328736A1

公开(公告)日：2020-10-15

申请号：US16557866

申请日：2019-08-30

Applicant: Microchip Technology Inc.

Inventor： Morten Terstrup ,  Thomas Joergensen

IPC: H03K5/135 ,  H03L7/085 ,  H04L7/033

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.

公开(公告)号：US09975145B2

公开(公告)日：2018-05-22

申请号：US14045689

申请日：2013-10-03

Applicant: Microchip Technology Inc.

Inventor： Jimes Lei ,  Ching Chu

IPC: B06B1/02

CPC classification number: B06B1/0215

Abstract: An electrical waveform generating circuit has a pair of Pulse Amplitude Controlled Switching Current Sources (PACS). A gate pulse driver circuit is coupled to an input of each of the pair of PACS for sending gate pulses for driving the pair of PACS. A digital-to-analog converter (DAC) circuit is coupled to the gate pulse driver circuit for controlling amplitudes of the gate pulses. A transducer is coupled to the PACS.

公开(公告)号：US20170164437A1

公开(公告)日：2017-06-08

申请号：US15437081

申请日：2017-02-20

Applicant: Microchip Technology Inc.

Inventor： Scott Lynch

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  G05F1/56 ,  H05B33/0815 ,  H05B33/0824 ,  H05B33/083 ,  Y02B20/345

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.

公开(公告)号：US09658276B2

公开(公告)日：2017-05-23

申请号：US14743945

申请日：2015-06-18

Applicant: Microchip Technology Inc.

Inventor： Alexander Mednik ,  Rohit Tirumala ,  Marc Tan ,  Simon Krugly

IPC: G01R31/26 ,  G01R31/02 ,  H02H3/04 ,  H02H3/08 ,  H02H3/093

CPC classification number: G01R31/2621 ,  G01R31/025 ,  H02H3/044 ,  H02H3/08 ,  H02H3/093

Abstract: A circuit and method are provided detecting a persistent short circuit in a power MOSFET for the purpose of protecting a load from over-current.

公开(公告)号：US09575497B2

公开(公告)日：2017-02-21

申请号：US14244746

申请日：2014-04-03

Applicant: MICROCHIP TECHNOLOGY INC.

Inventor： Scott Lynch

IPC: G05F1/56 ,  H05B33/08

CPC classification number: H05B33/0845 ,  G05F1/56 ,  H05B33/0815 ,  H05B33/0824 ,  H05B33/083 ,  Y02B20/345

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.

Abstract translation: 在由AC电源线工作的LED驱动器内部使用，本发明控制输入电流和输出功率。 采用这种调节电路，输入电流纯电阻，精确跟踪输入电压波形。 同时，它提供良好的线路调节和固有的相位调光器兼容性，不需要专门的电路来检测和处理调光器。

公开(公告)号：US20150382414A1

公开(公告)日：2015-12-31

申请号：US14748175

申请日：2015-06-23

Applicant: Microchip Technology Inc.

Inventor： Scott Lynch

IPC: H05B33/08

CPC classification number: H05B33/0812 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  Y02B20/348

Abstract: A sequential linear light emitting diode (LED) system with a low output ripple is disclosed. In one embodiment, the a sequential linear LED system comprises a bridge rectifier for generating a DC voltage, a diode for receiving the DC voltage, a capacitor coupled to the diode, a current regulator coupled to the capacitor for controlling the charging of the capacitor, and a plurality of segments coupled to the diode, each segment comprising an LED string and current regulator.

Abstract translation: 公开了具有低输出纹波的顺序线性发光二极管（LED）系统。 在一个实施例中，顺序线性LED系统包括用于产生DC电压的桥式整流器，用于接收DC电压的二极管，耦合到二极管的电容器，耦合到电容器的电流调节器，用于控制电容器的充电， 以及耦合到二极管的多个段，每个段包括LED串和电流调节器。

公开(公告)号：US20150372594A1

公开(公告)日：2015-12-24

申请号：US14742571

申请日：2015-06-17

Applicant: Microchip Technology Inc.

Inventor： ALEXANDER MEDNIK ,  ROHIT TIRUMALA ,  MARC TAN ,  SIMON KRUGLY

IPC: H02M3/158

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。

公开(公告)号：US20150341024A1

公开(公告)日：2015-11-26

申请号：US14817107

申请日：2015-08-03

Applicant: Microchip Technology Inc.

Inventor： BENEDICT C.K. CHOY ,  JAMES T. WALKER ,  MING-YUAN YEH

IPC: H03K17/06

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。