公开(公告)号：US20130188793A1

公开(公告)日：2013-07-25

申请号：US13692789

申请日：2012-12-03

Applicant: STMicroelectronics (Shenzhen) R&D CO. LTD. ,  STMicroelectronics, S.r.l.

Inventor： XiangSheng LI ,  Cristiano MERONI ,  Mei YANG ,  XianFeng XIONG

IPC: H03G11/00

CPC classification number: H03G3/348 ,  H03F1/52 ,  H03F3/183 ,  H03F3/21 ,  H03F2200/321 ,  H03F2200/375 ,  H03F2200/471 ,  H03F2200/78 ,  H03G11/00 ,  H04R1/00 ,  H04R3/007 ,  H04R2201/028 ,  H04R2499/13

Abstract: A method of operating a speaker system including a speaker coupled to an amplifier, and a dedicated digital speaker protection circuit includes turning on the amplifier in a mute mode, after a first delay period, issuing a play command to the amplifier to place the amplifier in a play mode, but without an input signal during a second delay period, and performing a speaker offset detection during the second delay period, wherein, if there is an offset, then the amplifier is forced back into the mute mode, and if there is no offset, then the amplifier is allowed to continue to operate in the play mode. The method also includes issuing a speaker protection control signal or command if an offset is detected.

公开(公告)号：US20130187681A1

公开(公告)日：2013-07-25

申请号：US13692702

申请日：2012-12-03

Applicant: STMicroelectronics (Shenzhen) R&D CO., LTD.

Inventor： Min CHEN ,  Wen LIU ,  HongXia LI ,  XiaoWu DAI

IPC: H03K17/16

CPC classification number: H03K17/167 ,  H03K17/163 ,  H03K17/164 ,  H03K17/166

Abstract: A switching circuit includes a first input stage having an input for receiving a first input signal, an output, and a power terminal for receiving an increasing analog current, a second input stage having an input for receiving a second input signal, an output, and a power terminal for receiving a decreasing analog current, and an output node coupled to the outputs of the first input stage and the second input stage for providing a switched output signal. An output stage is coupled between the first and second input stages and the output node. The first and second input stages are operational amplifiers.

Abstract translation: 开关电路包括：第一输入级，具有用于接收第一输入信号的输入端，输出端和用于接收增加的模拟电流的电源端;第二输入级，具有用于接收第二输入信号的输入端，输出端，以及 用于接收减小的模拟电流的电源端子，以及耦合到第一输入级和第二输入级的输出的输出节点，用于提供开关输出信号。 输出级耦合在第一和第二输入级与输出节点之间。 第一和第二输入级是运算放大器。

公开(公告)号：US20130169248A1

公开(公告)日：2013-07-04

申请号：US13658995

申请日：2012-10-24

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO.

Inventor： Hai Bo Zhang ,  Jin Li ,  Yong Jun Wu

IPC: G05F1/10

CPC classification number: H02M3/158 ,  H02M2001/0025 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A constant-frequency current-mode-controlled boost converter circuit provides slope compensation of an inductor current, reduces reverse inductor current in light output load conditions, and reduces oscillation between a discontinuous current mode and a continuous current mode by enabling or disabling an inductor current threshold. The constant-frequency current-mode-controlled boost converter circuit is efficient and stable in light, medium, and heavy output load conditions.

Abstract translation: 恒流电流模式控制的升压转换器电路提供电感电流的斜率补偿，减少光输出负载条件下的反向电感电流，并通过启用或禁用电感电流减少不连续电流模式和连续电流模式之间的振荡 阈。 恒流电流模式控制升压转换器电路在轻，中，重输出负载条件下是高效稳定的。

公开(公告)号：US20130093326A1

公开(公告)日：2013-04-18

申请号：US13649821

申请日：2012-10-11

Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO.

Inventor： HaiBo ZHANG ,  Jin LI

IPC: H02H3/20 ,  H02H3/08 ,  H05B37/02

CPC classification number: G09G3/20 ,  G09G2330/02 ,  G09G2330/08 ,  G09G2330/10

Abstract: A device and method for detecting a short circuit in an electrical component during a start-up routine. In an embodiment, a device may have a problematic display having a short circuit that may result in damage to other components of the device if the device were allowed to fully startup during a normal start-up routine. Thus, power supplied to the panel may be initiated in stages so as to monitor any current that may be flowing through the panel, which in turn, may be indicative of a short circuit in the panel. If enough “leakage” current is detected through the panel during this staged startup routine, then a short-circuit detection circuit may interrupt the startup routine and lock out the operation of the device until the detected short circuit in the panel can be addressed.

Abstract translation: 一种用于在启动程序期间检测电气部件中的短路的装置和方法。 在一个实施例中，如果设备在正常启动程序中被允许完全启动，则设备可能具有可能导致设备的其他组件损坏的短路的有问题的显示。 因此，提供给面板的功率可以分阶段地启动，以便监视可能流过面板的任何电流，这又可能表示面板中的短路。 如果在此分段启动程序期间通过面板检测到足够的“泄漏”电流，则短路检测电路可能会中断启动程序并锁定设备的操作，直到可以寻址检测到的面板短路。

公开(公告)号：US20130077421A1

公开(公告)日：2013-03-28

申请号：US13597373

申请日：2012-08-29

Applicant: HongWei Wang ,  Luca Molinari

Inventor： HongWei Wang ,  Luca Molinari

IPC: G11C29/12 ,  G11C8/00

CPC classification number: G11C29/18 ,  G11C5/04 ,  G11C7/00 ,  G11C8/00 ,  G11C29/26 ,  G11C29/44

Abstract: A failure diagnosis circuit includes a multiplexer and a controller. The multiplexer receives address signals, and selectively outputs one of the address signals to an addressable module in response to a selecting signal. The controller generates a first one of address signals and the selecting signal. A built-in self-test circuit generates the second address signal. The addressable module includes addressable components responsive to the address signal. The controller processes the output of the addressable module responsive to the address signal to make a failure diagnosis. The built-in self-test circuit performs signature analysis on the read out output of the addressable module.

公开(公告)号：US20130003888A1

公开(公告)日：2013-01-03

申请号：US13483796

申请日：2012-05-30

Applicant: Ni Zeng

Inventor： Ni Zeng

IPC: H04L27/00

CPC classification number: H04L25/0264

Abstract: An LIN transmitter includes a current mirror coupled to a transmit output node and a control circuit coupled to a transmit input node for controlling the current mirror with various load current control signals.

Abstract translation: LIN发射机包括耦合到发射输出节点的电流镜和耦合到发射输入节点的控制电路，用于利用各种负载电流控制信号控制电流镜。

公开(公告)号：US20130002224A1

公开(公告)日：2013-01-03

申请号：US13469287

申请日：2012-05-11

Applicant: Hongwu Lin

Inventor： Hongwu Lin

IPC: G05F1/618

CPC classification number: H02M3/158 ,  H02M1/36 ,  H02M2001/0032 ,  Y02B70/16

Abstract: A boost converter circuit receives an input power supply voltage and produces an output boosted supply voltage. The circuit includes a voltage regulator, boosting circuitry, and a timing controller. The voltage regulator provides a regulated voltage to the boosting circuitry, which controls switching a transistor to drive the output boosted supply voltage; and the timing controller controls switching the boost circuit from the start-up mode to the normal operation mode. In start-up mode, the regulated voltage is generated from the input power supply voltage. During normal operation mode, the regulated voltage is generated from the output boosted supply voltage. The circuitry performs a low-power start-up when the input power supply voltage is low, and maintains efficient low-power operation by driving the transistor to produce the output boosted supply voltage as the input power supply voltage decreases.

Abstract translation: 升压转换器电路接收输入电源电压并产生输出升压的电源电压。 电路包括电压调节器，升压电路和时序控制器。 电压调节器向升压电路提供调节电压，其控制晶体管的切换以驱动输出升压的电源电压; 并且定时控制器控制升压电路从启动模式切换到正常操作模式。 在启动模式下，从输入电源电压产生调节电压。 在正常工作模式下，调节电压由输出升压电源电压产生。 当输入电源电压低时，电路执行低功率启动，并且通过驱动晶体管以在输入电源电压降低时产生输出升压的电源电压来保持有效的低功率操作。

公开(公告)号：US20120170864A1

公开(公告)日：2012-07-05

申请号：US13332949

申请日：2011-12-21

Applicant: Anna Raffalli ,  Haiyun Wang ,  Lucas Hui ,  Patricia Chiang

Inventor： Anna Raffalli ,  Haiyun Wang ,  Lucas Hui ,  Patricia Chiang

IPC: G06K9/40

CPC classification number: H04N19/00066 ,  H04N19/117 ,  H04N19/14 ,  H04N19/86

Abstract: Systems and methods are disclosed for determining the perceptibility of noise in a block of images and/or video. The systems and methods may compute a mask value for the block using a block masking generator. The mask value may indicate the perceptibility of noise in the block. The mask value may be computed using a normalized activity value and/or a texture value for the block. The normalized activity value may indicate the relative activity in the block as compared to the activity in the image and/or video. The texture value may indicate the strength and/or number of edges in the block.

Abstract translation: 公开了用于确定图像和/或视频块中的噪声的感知性的系统和方法。 系统和方法可以使用块掩码生成器来计算块的掩码值。 掩模值可以指示块中的噪声的可感知性。 可以使用归一化活动值和/或块的纹理值来计算掩模值。 与图像和/或视频中的活动相比，归一化活动值可以指示块中的相对活动。 纹理值可以指示块中的边缘的强度和/或数量。

公开(公告)号：US20110109296A1

公开(公告)日：2011-05-12

申请号：US12938244

申请日：2010-11-02

Applicant: Jun Liu

Inventor： Jun Liu

IPC: G05F3/16

CPC classification number: G05F3/30

Abstract: An integrated circuit includes a bandgap reference generator and a voltage regulator. The bandgap reference generator includes a first current path, and a first bipolar transistor with an emitter-collector path in the first current path. The voltage regulator includes a second current path, wherein the second current path mirrors the first current path; a resistor configured to receive a current of the second current path; a second bipolar transistor with a base and a collector of the second bipolar transistor being interconnected; and a third bipolar transistor connected in series with the second bipolar transistor and the resistor. A base and a collector of the third bipolar transistor are interconnected.

Abstract translation: 集成电路包括带隙参考发生器和电压调节器。 带隙基准发生器包括第一电流路径和在第一电流路径中具有发射极 - 集电极路径的第一双极晶体管。 电压调节器包括第二电流通路，其中第二电流通路反射第一电流通路; 电阻器，被配置为接收所述第二电流路径的电流; 具有第二双极晶体管的基极和集电极的第二双极晶体管被互连; 以及与第二双极晶体管和电阻器串联连接的第三双极晶体管。 第三双极晶体管的基极和集电极相互连接。

公开(公告)号：US20210172983A1

公开(公告)日：2021-06-10

申请号：US16746444

申请日：2020-01-17

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Dino COSTANZO ,  Cheng Pan CAI ,  Xi Yu XU

IPC: G01R19/25 ,  G01R15/14 ,  H02P27/08 ,  H02M1/00 ,  H02M7/5387

Abstract: A three-phase load is powered by a PWM (e.g., SVPWM) driven DC-AC inverter having a single shunt-topology. A shunt voltage and a branch voltage of the inverter (across a transistor to be calibrated) are measured during a second period of each SVPWM sector, and the drain-to-source resistance of the calibrated transistor is calculated. During the fourth period of each SVPWM sector, the branch voltage is measured again, and another branch voltage across another transistor is measured. Using the drain-to-source resistance of the calibrated transistor and the voltage across the calibrated transistor measured during the fourth period, the phase current through the calibrated transistor is calculated. Using the other branch voltage measured during the fourth period and the drain-to-source resistance of its corresponding transistor (known from a prior SVPWM sector), the phase current through that transistor is calculated. From the two calculated phase currents, the other phase current can be calculated.