公开(公告)号：US20150109060A1

公开(公告)日：2015-04-23

申请号：US14244948

申请日：2014-04-04

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： Yen-Yin Huang ,  Ming-Shih Yu

IPC: H03L7/085

CPC classification number: H03L1/00

Abstract: A process, voltage, and temperature compensated oscillator, formed on an integrate circuit implemented by a semiconductor process, receives a supply voltage and includes: a variation bias unit provided with a variation bias output terminal and generating a process, voltage, and temperature compensated signal; a controlled oscillating unit provided with a control input terminal and an oscillating output and determining a signal oscillating frequency at the oscillating output terminal according to a signal at the control input terminal; and a tuning unit provided with a tuning input terminal, a compensating input terminal, a control output terminal, and a variable-parameter element, wherein the variable-parameter element includes a parameter and is coupled to the control output terminal, and the tuning unit determines the parameter according to a signal at the variation bias output terminal and a voltage signal or a digital signal received at the tuning input terminal.

Abstract translation: 形成在由半导体工艺实现的集成电路上的工艺，电压和温度补偿振荡器接收电源电压，并包括：设置有变化偏置输出端子并产生过程，电压和温度补偿信号的变化偏置单元 ; 控制振荡单元，设置有控制输入端子和振荡输出端，并根据控制输入端子处的信号确定振荡输出端子处的信号振荡频率; 以及设置有调谐输入端子，补偿输入端子，控制输出端子和可变参数元件的调谐单元，其中所述可变参数元件包括参数并耦合到所述控制输出端子，并且所述调谐单元 根据变化偏置输出端子处的信号和在调谐输入端子处接收的电压信号或数字信号来确定参数。

公开(公告)号：US20150042393A1

公开(公告)日：2015-02-12

申请号：US14078928

申请日：2013-11-13

Applicant: RICHTEK TECHNOLOGY CORP

Inventor： An-Tung Chen ,  Chien-Liang Kuo ,  Jo Yu Wang ,  Kuo-Chung Lee

IPC: H03K19/017 ,  H03K19/0185 ,  H03K3/356

CPC classification number: H03K19/017 ,  H03K3/356104 ,  H03K19/018507

Abstract: A level shifter includes an input stage circuit, a latch circuit and a transient speed-up circuit. The input stage circuit receives an input signal. The latch circuit is coupled to the input stage circuit through a first output terminal and a second output terminal, and determining steady-state levels of the first and the second output terminals according to the input signal. The transient speed-up circuit is coupled to the first and the second output terminals. When the transient speed-up circuit determines the first and the second output terminals are at the same logic level, the transient speed-up circuit accelerates the positive edge transition of the first or the second terminals.

Abstract translation: 电平移位器包括输入级电路，锁存电路和瞬态加速电路。 输入级电路接收输入信号。 锁存电路通过第一输出端和第二输出端耦合到输入级电路，并根据输入信号确定第一和第二输出端的稳态电平。 瞬态加速电路耦合到第一和第二输出端。 当瞬态加速电路确定第一和第二输出端子处于相同的逻辑电平时，瞬态加速电路加速第一或第二端子的正沿转变。

公开(公告)号：US08952741B1

公开(公告)日：2015-02-10

申请号：US14078928

申请日：2013-11-13

Applicant: Richtek Technology Corp

Inventor： An-Tung Chen ,  Chien-Liang Kuo ,  Jo Yu Wang ,  Kuo-Chung Lee

IPC: H03L5/00 ,  H03K19/017 ,  H03K3/356 ,  H03K19/0185

CPC classification number: H03K19/017 ,  H03K3/356104 ,  H03K19/018507

Abstract: A level shifter includes an input stage circuit, a latch circuit and a transient speed-up circuit. The input stage circuit receives an input signal. The latch circuit is coupled to the input stage circuit through a first output terminal and a second output terminal, and determining steady-state levels of the first and the second output terminals according to the input signal. The transient speed-up circuit is coupled to the first and the second output terminals. When the transient speed-up circuit determines the first and the second output terminals are at the same logic level, the transient speed-up circuit accelerates the positive edge transition of the first or the second terminals.

Abstract translation: 电平移位器包括输入级电路，锁存电路和瞬态加速电路。 输入级电路接收输入信号。 锁存电路通过第一输出端和第二输出端耦合到输入级电路，并根据输入信号确定第一和第二输出端的稳态电平。 瞬态加速电路耦合到第一和第二输出端。 当瞬态加速电路确定第一和第二输出端子处于相同的逻辑电平时，瞬态加速电路加速第一或第二端子的正沿转变。

公开(公告)号：US08907583B1

公开(公告)日：2014-12-09

申请号：US14066268

申请日：2013-10-29

Applicant: Richtek Technology Corp.

Inventor： Chih-Feng Huang ,  Kuo-Chin Chiu

IPC: H05B33/08

CPC classification number: H05B33/083

Abstract: An LED driving device includes: a rectifying circuit for outputting a DC voltage to a string of M LED units; (M−1) first switching circuits each coupled between a corresponding one of first to (M−1)th LED units and ground; and a second switching circuit coupled between an Mth LED unit and ground. When the DC voltage is sufficient to turn on first to kth LED units, where 1≦k≦M, the kth LED unit is coupled to ground through first and second conductive paths provided by a resistor unit, and a corresponding first switching circuit or the second switching circuit, and each of the first to (k−1)th LED units is coupled to ground through a third conductive path provided by a corresponding first switching circuit and the resistor unit.

Abstract translation: 一种LED驱动装置，包括：整流电路，用于向一串M LED单元输出DC电压; （M-1）个第一开关电路，每个第一开关电路分别耦合在第一至第（M-1）个LED单元中的相应一个LED单元和地之间; 以及耦合在第M个LED单元和地之间的第二开关电路。 当直流电压足以使第一至第九LED单元接通时，其中第一LED单元通过由电阻器单元提供的第一和第二导电路径以及相应的第一开关电路或 第二开关电路，并且第一至第（k-1）个LED单元中的每一个通过由相应的第一开关电路和电阻器单元提供的第三导电路径耦合到地。

公开(公告)号：US20140344601A1

公开(公告)日：2014-11-20

申请号：US13970331

申请日：2013-08-19

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Wei-Jen Huang ,  Tsung-Wei Huang ,  Shui-Mu Lin

IPC: G06F1/32

CPC classification number: H02J50/12 ,  G06F1/3293 ,  H02J5/005 ,  H02J50/80 ,  H02M3/1588 ,  H02M3/33592 ,  H02M5/4505 ,  H02M5/4585 ,  H02M2001/4275

Abstract: A wireless power receiver includes a power receiving circuit wirelessly receiving power transmitted from a wireless power transmitter so as to generate an induced current, and a rectifying-and-modulating circuit including first to eighth switches and a control unit. The control unit is operable to control operation of each of the first to eighth switches between conduction and non-conduction. Accordingly, the first to fourth switches cooperatively constitute a full-bridge rectifier for rectifying the induced current generated by the power receiving circuit, and each of the fifth to eighth switches is operable to switch synchronously with a respective one of the first to fourth switches or to became non-conducting, thereby changing an amplitude of the induced current.

Abstract translation: 无线电力接收机包括无线接收从无线电力发射机发送的功率以产生感应电流的电力接收电路，以及包括第一至第八开关和控制单元的整流和调制电路。 控制单元可操作以控制导通和非导通之间的第一至第八开关中的每一个的操作。 因此，第一至第四开关协同地构成用于整流由电力接收电路产生的感应电流的全桥整流器，并且第五至第八开关中的每一个可操作以与第一至第四开关中的相应一个开关同步地切换， 变成不导通，从而改变感应电流的幅度。

公开(公告)号：US20140340949A1

公开(公告)日：2014-11-20

申请号：US14075717

申请日：2013-11-08

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Chien-Hung Chen ,  Isaac Y. Chen ,  Yi-Wei Lee ,  Jyun-Che Ho

IPC: H02M7/217

CPC classification number: H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

Abstract: A power converter includes a rectifier and a power factor corrector. The rectifier is to be coupled to an alternating current power source and is configured to output a rectified signal. The power factor corrector includes a correcting circuit and a control circuit. The correcting circuit receives the rectified signal and is configured to generate an output voltage based on the rectified signal and a driving signal. The control circuit is configured to generate a first to-be-compared signal based on the rectified signal, to generate a second to-be-compared signal based on the output voltage, to compare the first and second to-be-compared signals, and to generate the driving signal based on a result of comparison performed thereby.

Abstract translation: 功率转换器包括整流器和功率因数校正器。 整流器被耦合到交流电源，并且被配置为输出整流信号。 功率因数校正器包括校正电路和控制电路。 校正电路接收经整流的信号，并且被配置为基于整流信号和驱动信号产生输出电压。 控制电路被配置为基于整流信号产生第一待比较信号，以基于输出电压产生第二待比较信号，以比较第一和第二待比较信号， 并且基于由此执行的比较结果来产生驱动信号。

公开(公告)号：US08791725B2

公开(公告)日：2014-07-29

申请号：US14062192

申请日：2013-10-24

Applicant: Richtek Technology Corp.

Inventor： Pei-Kai Tseng ,  Chien-Fu Tang ,  Issac Y. Chen ,  Jyun-Che Ho

IPC: H03K3/00 ,  H03K5/1536

CPC classification number: H02M1/38 ,  G01R19/0084 ,  G01R31/40 ,  H03K5/1536 ,  H05B41/2981

Abstract: A high voltage half-bridge driver circuit has a high voltage terminal and a floating node to be connected with a high side switch therebetween. When turning on the high side switch, a high voltage offset detection circuit detects a voltage related to the voltage at the floating node for triggering a zero voltage switching signal.

Abstract translation: 高电压半桥驱动电路具有高电压端子和浮动节点，以与它们之间的高侧开关连接。 当开启高压侧开关时，高压偏移检测电路检测与浮动节点处的电压相关的电压，以触发零电压切换信号。

公开(公告)号：US08736474B1

公开(公告)日：2014-05-27

申请号：US13846627

申请日：2013-03-18

Applicant: Richtek Technology Corp.

Inventor： Chih-Hsien Wang

IPC: H03M3/00

CPC classification number: H03M3/454 ,  H03M3/458

Abstract: A delta-sigma modulator includes: a loop filter for processing an analog input signal and a feedback signal to generate a filtered signal; a noise coupler operable to generate a noise coupled signal based on the filtered signal and the feedback signal; a quantizer for quantizing the noise coupled signal to generate a digital output signal; and a digital-to-analog converter converting the digital output signal to the feedback signal. The noise coupler includes an amplifier that has an inverting input terminal receiving a difference between the filtered signal and the feedback signal, and a non-inverting output terminal outputting the noise coupled signal, and a capacitor coupled between the inverting input terminal and the non-inverting output terminal of the amplifier.

Abstract translation: Δ-Σ调制器包括：环路滤波器，用于处理模拟输入信号和反馈信号以产生滤波信号; 噪声耦合器，其可操作以基于滤波信号和反馈信号产生噪声耦合信号; 量化器，用于量化噪声耦合信号以产生数字输出信号; 以及将数字输出信号转换为反馈信号的数模转换器。 噪声耦合器包括具有接收滤波信号和反馈信号之间的差的反相输入端的放大器和输出噪声耦合信号的非反相输出端，以及耦合在反相输入端和非反相输入端之间的电容器， 放大器的反相输出端子。

公开(公告)号：US20130234780A1

公开(公告)日：2013-09-12

申请号：US13867662

申请日：2013-04-22

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Hung-Shou NIEN ,  Chung-Sheng CHENG

IPC: H03K3/011

CPC classification number: H03K3/011 ,  H02M3/1588 ,  H02M2001/0025 ,  Y02B70/1466

Abstract: For thermal compensation for an intrinsic element in a system, a circuit and method are proposed to predict the temperature variation caused by power loss of the intrinsic element, in addition to sense the external environment temperature variation of the intrinsic element, and thus sense the operational temperature of the intrinsic element more precisely.

Abstract translation: 对于系统中本征元件的热补偿，提出了一种电路和方法来预测由本征元件的功率损耗引起的温度变化，以及感测本征元件的外部环境温度变化，从而感知操作 内在元素的温度更精确。

公开(公告)号：US20130194837A1

公开(公告)日：2013-08-01

申请号：US13801533

申请日：2013-03-13

Applicant: RICHTEK TECHNOLOGY CORP.

Inventor： Tzu Chen LIN ,  Pei Lun HUANG

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/335 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A control circuit and method are provided for a flyback converter converting an input voltage to an output voltage, to compensate for an entry point of a burst mode of the flyback converter, so that the entry point is not affected by the input voltage, and audible noise resulted from a higher input voltage is reduced without impacting the light load efficiency of the flyback converter.

Abstract translation: 提供了一种控制电路和方法，用于将反相转换器将输入电压转换为输出电压，以补偿反激式转换器的突发模式的入口点，使得入口点不受输入电压的影响，并且可听见 由于较高的输入电压导致的噪声降低，而不会影响反激式转换器的轻负载效率。