公开(公告)号：US07576527B1

公开(公告)日：2009-08-18

申请号：US11491021

申请日：2006-07-20

申请人： Jiancheng Zhang ,  Shaoan Dai

发明人： Jiancheng Zhang ,  Shaoan Dai

IPC分类号： G05F1/575

CPC分类号： H02M3/1563 ,  H02M2001/0009

摘要： A voltage converter includes, among other things, an amplifier, a voltage combiner, and a hysteretic comparator. The amplifier has a first input terminal which receives a first voltage representative of an output voltage of the voltage converter, a second input terminal which receives a first reference voltage, and an output terminal which generates a second voltage proportional to a difference between the first voltage and the first reference voltage. The voltage combiner combines the second voltage with a second reference voltage to generate a combined voltage. The comparator causes a third voltage to decrease if a feedback voltage defined by the third voltage is detected by the comparator as being greater than a first threshold voltage defined by the combined voltage, and further to cause the third voltage to increase if the feedback voltage is detected by the comparator as being less than the first threshold. The third voltage is applied to a first terminal of a load external to the voltage converter.

摘要翻译： 电压转换器尤其包括放大器，电压组合器和迟滞比较器。 该放大器具有第一输入端子，该第一输入端子接收表示电压转换器的输出电压的第一电压，接收第一参考电压的第二输入端子和产生与第一电压 和第一参考电压。 电压组合器将第二电压与第二参考电压组合以产生组合电压。 如果由比较器检测到由第三电压限定的反馈电压大于由组合电压限定的第一阈值电压，则比较器使得第三电压降低，并且如果反馈电压为 由比较器检测为小于第一阈值。 第三电压被施加到电压转换器外部的负载的第一端子。

公开(公告)号：US08948330B1

公开(公告)日：2015-02-03

申请号：US13589460

申请日：2012-08-20

申请人： Shaoan Dai

发明人： Shaoan Dai

IPC分类号： H04L7/00

CPC分类号： H03L7/093 ,  H03L7/107 ,  H04L7/0004

摘要： In accordance with an embodiment of the disclosure, systems and methods are provided for aligning signals in a timing recovery system. In certain implementations, a coarse phase error indicative of a phase offset between a reference signal and a signal is identified. The signal is transformed based at least in part on the coarse phase error, and operation of a phase-locked loop is initiated based at least in part on the coarse phase error.

摘要翻译： 根据本公开的实施例，提供了用于在定时恢复系统中对准信号的系统和方法。 在某些实现中，识别出指示参考信号和信号之间的相位偏移的粗略相位误差。 该信号至少部分地基于粗略的相位误差进行变换，并且至少部分地基于粗略的相位误差来启动锁相环的操作。

公开(公告)号：US08787860B2

公开(公告)日：2014-07-22

申请号：US13549376

申请日：2012-07-13

申请人： Shaoan Dai ,  Runsheng He

发明人： Shaoan Dai ,  Runsheng He

IPC分类号： H04B1/10

CPC分类号： H04B1/28 ,  H04B1/0007

摘要： The present disclosure includes apparatus, systems, and techniques relating to receiver image cancellation. A described technique includes receiving a downconverted signal in a digital domain, the downconverted signal including an in-phase signal and a quadrature signal; generating a first signal of a signal channel based on the downconverted signal; generating a second signal of an image channel based on the downconverted signal; filtering the second signal using first weights to produce a pilot training signal; filtering the second signal using second weights to produce an image cancellation signal; generating an output signal by subtracting the image cancellation signal from the first signal to resolve the desired signal; updating the first weights based on the first weights, the second signal, the pilot training signal, and a pilot signal; and updating the second weights based on the second weights, the output signal, and the pilot training signal.

摘要翻译： 本公开包括与接收机图像消除有关的装置，系统和技术。 所描述的技术包括在数字域中接收下变频信号，所述下变频信号包括同相信号和正交信号; 基于下变频信号产生信号信道的第一信号; 基于下变频信号产生图像通道的第二信号; 使用第一权重对所述第二信号进行滤波以产生导频训练信号; 使用第二权重来过滤第二信号以产生图像消除信号; 通过从第一信号中减去图像消除信号来产生输出信号以解析所需信号; 基于第一权重，第二信号，导频训练信号和导频信号来更新第一加权; 以及基于所述第二权重，所述输出信号和所述导频训练信号来更新所述第二权重。

公开(公告)号：US20130023226A1

公开(公告)日：2013-01-24

申请号：US13549376

申请日：2012-07-13

申请人： Shaoan Dai ,  Runsheng He

发明人： Shaoan Dai ,  Runsheng He

IPC分类号： H04B15/00

CPC分类号： H04B1/28 ,  H04B1/0007

摘要： The present disclosure includes apparatus, systems, and techniques relating to receiver image cancellation. A described technique includes receiving a downconverted signal in a digital domain, the downconverted signal including an in-phase signal and a quadrature signal; generating a first signal of a signal channel based on the downconverted signal; generating a second signal of an image channel based on the downconverted signal; filtering the second signal using first weights to produce a pilot training signal; filtering the second signal using second weights to produce an image cancellation signal; generating an output signal by subtracting the image cancellation signal from the first signal to resolve the desired signal; updating the first weights based on the first weights, the second signal, the pilot training signal, and a pilot signal; and updating the second weights based on the second weights, the output signal, and the pilot training signal.

摘要翻译： 本公开包括与接收机图像消除有关的装置，系统和技术。 所描述的技术包括在数字域中接收下变频信号，所述下变频信号包括同相信号和正交信号; 基于下变频信号产生信号信道的第一信号; 基于下变频信号产生图像通道的第二信号; 使用第一权重对所述第二信号进行滤波以产生导频训练信号; 使用第二权重对第二信号进行滤波以产生图像消除信号; 通过从第一信号中减去图像消除信号来产生输出信号以解析所需信号; 基于第一权重，第二信号，导频训练信号和导频信号来更新第一加权; 以及基于所述第二权重，所述输出信号和所述导频训练信号来更新所述第二权重。

公开(公告)号：US08552658B2

公开(公告)日：2013-10-08

申请号：US12547240

申请日：2009-08-25

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0851

摘要： Apparatuses, methods, systems, and circuits for light-emitting diode (LED) control are disclosed. In one embodiment, an LED control circuit can include a first pin receiving an input voltage supply; a second pin receiving a primary signal from a primary winding of a transformer coupled to the LED; a third pin coupled to a ground supply; and logic configured to estimate an output current and/or output voltage at the LED coupled to a secondary winding of the transformer from the input voltage supply and the primary signal.

摘要翻译： 公开了用于发光二极管（LED）控制的装置，方法，系统和电路。 在一个实施例中，LED控制电路可以包括接收输入电压源的第一引脚; 第二引脚从耦合到所述LED的变压器的初级绕组接收主信号; 耦合到地面电源的第三引脚; 以及被配置为从所述输入电压源和所述主信号估计耦合到所述变压器的次级绕组的所述LED处的输出电流和/或输出电压的逻辑。

公开(公告)号：US08344709B2

公开(公告)日：2013-01-01

申请号：US12556859

申请日：2009-09-10

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： G05F1/10 ,  G05F1/40 ,  G05F5/00

CPC分类号： G05F1/565 ,  H02M3/156 ,  H02M2001/0009 ,  H05B33/0815 ,  Y02B20/346

摘要： In one embodiment, the present invention includes a circuit having a voltage estimation circuit to receive a first voltage and generate an estimation of an output voltage of a power conversion circuit based on the first voltage. The first voltage is from a circuit node between a first terminal of a switch and a first terminal of an inductor. The circuit further comprises a current estimation circuit to receive a first current and generate an estimation of an output current of the power conversion circuit based on the first current. The first current is a current through the switch. The circuit further includes a pulse width modulation circuit to produce a pulse width modulated signal based on the estimation of an output voltage and the estimation of an output current.

摘要翻译： 在一个实施例中，本发明包括具有电压估计电路的电路，用于接收第一电压并且基于第一电压产生功率转换电路的输出电压的估计。 第一电压来自开关的第一端子和电感器的第一端子之间的电路节点。 电路还包括电流估计电路，用于接收第一电流并且基于第一电流产生功率转换电路的输出电流的估计。 第一个电流是通过开关的电流。 该电路还包括脉冲宽度调制电路，用于基于输出电压的估计和输出电流的估计来产生脉宽调制信号。

公开(公告)号：US07990126B1

公开(公告)日：2011-08-02

申请号：US12507322

申请日：2009-07-22

申请人： Jiancheng Zhang ,  Shaoan Dai

发明人： Jiancheng Zhang ,  Shaoan Dai

IPC分类号： G05F1/575

CPC分类号： H02M3/1563 ,  H02M2001/0009

摘要： A voltage converter includes, among other things, an amplifier, a voltage combiner, and a hysteretic comparator. The amplifier has a first input terminal which receives a first voltage representative of an output voltage of the voltage converter, a second input terminal which receives a first reference voltage, and an output terminal which generates a second voltage proportional to a difference between the first voltage and the first reference voltage. The voltage combiner combines the second voltage with a second reference voltage to generate a combined voltage. The comparator causes a third voltage to decrease if a feedback voltage defined by the third voltage is detected by the comparator as being greater than a first threshold voltage defined by the combined voltage, and further to cause the third voltage to increase if the feedback voltage is detected by the comparator as being less than the first threshold. The third voltage is applied to a first terminal of a load external to the voltage converter.

摘要翻译： 电压转换器尤其包括放大器，电压组合器和迟滞比较器。 该放大器具有第一输入端子，该第一输入端子接收表示电压转换器的输出电压的第一电压，接收第一参考电压的第二输入端子和产生与第一电压 和第一参考电压。 电压组合器将第二电压与第二参考电压组合以产生组合电压。 如果由比较器检测到由第三电压限定的反馈电压大于由组合电压限定的第一阈值电压，则比较器使得第三电压降低，并且如果反馈电压为 由比较器检测为小于第一阈值。 第三电压被施加到电压转换器外部的负载的第一端子。

公开(公告)号：US20100090671A1

公开(公告)日：2010-04-15

申请号：US12556859

申请日：2009-09-10

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： G05F1/46

CPC分类号： G05F1/565 ,  H02M3/156 ,  H02M2001/0009 ,  H05B33/0815 ,  Y02B20/346

摘要： In one embodiment, the present invention includes a circuit comprising a voltage estimation circuit to receive a first voltage and generate an estimation of an output voltage of a power conversion circuit based on the first voltage. The first voltage is from a circuit node between a first terminal of a switch and a first terminal of an inductor. The circuit further comprises a current estimation circuit to receive a first current and generate an estimation of an output current of the power conversion circuit based on the first current. The first current is a current through the switch. The circuit further comprises a pulse width modulation circuit to produce a pulse width modulated signal based on the estimation of an output voltage and the estimation of an output current.

摘要翻译： 在一个实施例中，本发明包括电路，该电路包括用于接收第一电压并基于第一电压产生功率转换电路的输出电压的估计的电压估计电路。 第一电压来自开关的第一端子和电感器的第一端子之间的电路节点。 电路还包括电流估计电路，用于接收第一电流并且基于第一电流产生功率转换电路的输出电流的估计。 第一个电流是通过开关的电流。 该电路还包括脉冲宽度调制电路，用于基于输出电压的估计和输出电流的估计来产生脉宽调制信号。

公开(公告)号：US20100079081A1

公开(公告)日：2010-04-01

申请号：US12547240

申请日：2009-08-25

申请人： Wanfeng ZHANG ,  Jianqing LIN ,  Shaoan DAI

发明人： Wanfeng ZHANG ,  Jianqing LIN ,  Shaoan DAI

IPC分类号： H05B41/36

CPC分类号： H05B33/0815 ,  H05B33/0851

摘要： Apparatuses, methods, systems, and circuits for light-emitting diode (LED) control are disclosed. In one embodiment, an LED control circuit can include a first pin receiving an input voltage supply; a second pin receiving a primary signal from a primary winding of a transformer coupled to the LED; a third pin coupled to a ground supply; and logic configured to estimate an output current and/or output voltage at the LED coupled to a secondary winding of the transformer from the input voltage supply and the primary signal.

摘要翻译： 公开了用于发光二极管（LED）控制的装置，方法，系统和电路。 在一个实施例中，LED控制电路可以包括接收输入电压源的第一引脚; 第二引脚从耦合到所述LED的变压器的初级绕组接收主信号; 耦合到地面电源的第三引脚; 以及被配置为从所述输入电压源和所述主信号估计耦合到所述变压器的次级绕组的所述LED处的输出电流和/或输出电压的逻辑。