公开(公告)号：US09436197B1

公开(公告)日：2016-09-06

申请号：US13857662

申请日：2013-04-05

Applicant: Marvell International Ltd.

Inventor： Qiang Tang ,  Chen Ma ,  Bo Wang

IPC: G05F1/565 ,  G05F1/575

CPC classification number: G05F1/565 ,  G05F1/575

Abstract: Aspects of the disclosure provide a circuit having an amplifier and a load current based control circuit. The amplifier is configured to detect a difference between a feedback voltage and a reference voltage, and control, based on the difference, a pass device to regulate an output voltage for supplying power to load devices. The feedback voltage is indicative of the regulated output voltage from the pass device. The load current based control circuit is configured to sense a load current output from the pass device to the load devices and generate a control signal to adjust a compensation capacitance based on the sensed load current to adjust a zero frequency of the circuit.

Abstract translation: 本公开的方面提供了具有放大器和基于负载电流的控制电路的电路。 放大器被配置为检测反馈电压和参考电压之间的差异，并且基于差异来控制通过装置来调节用于向负载装置供电的输出电压。 反馈电压表示来自通过装置的稳压输出电压。 基于负载电流的控制电路被配置为感测从通过装置输出到负载装置的负载电流，并产生控制信号，以基于所感测的负载电流来调整补偿电容，以调整电路的零频率。

公开(公告)号：US08674743B1

公开(公告)日：2014-03-18

申请号：US13768706

申请日：2013-02-15

Applicant: Marvell International Ltd.

Inventor： Qiang Tang ,  Bo Wang

IPC: H03L5/00

CPC classification number: H03G1/0029 ,  G11B20/10027 ,  G11B20/10324 ,  H03F3/45201 ,  H03F3/45475 ,  H03F2203/45396 ,  H03F2203/45522 ,  H03F2203/45562 ,  H03F2203/45591

Abstract: In one embodiment, an apparatus includes an amplifier configured to receive an asymmetric signal. A first resistance is coupled between an input node and an output node of the amplifier. A second resistance is coupled to the input node of the amplifier. A first switch is configured to be controlled during a first interval to couple the second resistance to a positive resistance to increase a gain of the amplifier to correct the asymmetric signal. The gain is a function of the first resistance and a combination of the second resistance and the positive resistance. A second switch is configured to be controlled during a second interval to couple the second resistance to a negative resistance to decrease the gain of the amplifier to correct the asymmetric signal. The gain is a function of the first resistance and a combination of the second resistance and the negative resistance.

Abstract translation: 在一个实施例中，一种装置包括被配置为接收不对称信号的放大器。 第一电阻耦合在放大器的输入节点和输出节点之间。 第二电阻耦合到放大器的输入节点。 第一开关被配置为在第一间隔期间被控制以将第二电阻耦合到正电阻以增加放大器的增益以校正不对称信号。 增益是第一电阻和第二电阻和正电阻的组合的函数。 第二开关被配置为在第二间隔期间被控制以将第二电阻耦合到负电阻以减小放大器的增益以校正不对称信号。 增益是第一电阻和第二电阻和负电阻的组合的函数。

公开(公告)号：US09001875B1

公开(公告)日：2015-04-07

申请号：US14052117

申请日：2013-10-11

Applicant: Marvell International Ltd.

Inventor： Lydi Smaini ,  Neric Fong ,  Sang Won Son ,  Bo Wang

IPC: H04B1/38 ,  H04B1/40

CPC classification number: H04B1/40 ,  H03D2200/0045 ,  H03D2200/0082 ,  H03D2200/009 ,  H04B1/30

Abstract: The disclosure can provide methods and systems for autocalibrating a transceiver. The method can include upconverting a bandpass input signal by mixing the bandpass input signal with a first local oscillator signal to form an initial transmitter signal. The initial transmitter signal can be looped back to a receiver and downconverted with a second local oscillator signal having a frequency that is different from the first local oscillator to form an intermediate frequency signal. At least one of a gain and a phase of the transmitter can be adjusted based on a transmitter image sideband of the intermediate frequency signal to generate a calibrated transmitter signal having minimized transmitter image sideband.

Abstract translation: 本公开可以提供用于自动校准收发器的方法和系统。 该方法可以包括通过将带通输入信号与第一本地振荡器信号混合以形成初始发射机信号来上变频带通输入信号。 初始发射机信号可以环回到接收机，并且与具有不同于第一本地振荡器的频率的第二本地振荡器信号下变频以形成中频信号。 可以基于中频信号的发射机图像边带来调整发射机的增益和相位中的至少一个，以生成具有最小化的发射机图像边带的经校准的发射机信号。

公开(公告)号：US08982849B1

公开(公告)日：2015-03-17

申请号：US13713813

申请日：2012-12-13

Applicant: Marvell International Ltd.

Inventor： Atul Salhotra ,  Ping Gao ,  Bo Wang

IPC: H04W4/00 ,  H04W72/04

CPC classification number: H04W72/0453 ,  H04W72/00 ,  H04W74/0816 ,  H04W84/12 ,  H04W88/08

Abstract: A wireless network device comprising a physical layer (PHY) module and a media access control (MAC) module. The PHY module is configured to communicate with an 80 MHz channel. The 80 MHz channel includes a plurality of sub-bands including a first sub-band, a second sub-band, a third sub-band, and a fourth sub-band. One of the plurality of sub-bands corresponds to a primary channel. The PHY module is further configured to determine which of the plurality of sub-bands are receiving a data packet, and generate at least one clear channel assessment signal indicating which of the plurality of sub-bands are receiving the data packet. The MAC module is configured to receive the at least one clear channel assessment signal from the PHY module, and selectively transmit on the primary channel based on the at least one clear channel assessment signal.

Abstract translation: 一种包括物理层（PHY）模块和媒体访问控制（MAC）模块的无线网络设备。 PHY模块被配置为与80MHz信道进行通信。 80MHz信道包括包括第一子带，第二子带，第三子带和第四子带的多个子带。 多个子带中的一个对应于主信道。 PHY模块还被配置为确定多个子带中的哪一个正在接收数据分组，并且生成指示多个子带中的哪一个正在接收数据分组的至少一个清除信道评估信号。 MAC模块被配置为从PHY模块接收至少一个清除信道评估信号，并且基于所述至少一个清除信道评估信号在主信道上选择性地发送。