公开(公告)号：US20180011506A1

公开(公告)日：2018-01-11

申请号：US15679274

申请日：2017-08-17

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Ni Zeng

IPC: G05F1/575

Abstract: A low dropout amplifier may include an error amplifier having first and second inputs coupled to a reference signal and a feedback signal, respectively. The error amplifier may be configured to generate first and second error signals at first and second outputs, respectively, with the first and second error signals based upon a difference between the reference signal and the feedback signal. A sink stage may be coupled to the first output and configured to generate a sink current based upon the first error signal. A source stage may be coupled to the second output and configured to generate a source current based upon the second error signal. An output node may be coupled to receive the sink and source currents.

公开(公告)号：US09859196B2

公开(公告)日：2018-01-02

申请号：US15251127

申请日：2016-08-30

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd.

Inventor： Jing-En Luan

IPC: H01L23/495 ,  H01L23/00 ,  H01L23/48 ,  H01L23/433 ,  H01L23/367 ,  H01L23/498 ,  H01L21/768 ,  H01L23/482 ,  H01L23/28 ,  H01L23/31 ,  H01L21/56

CPC classification number: H01L23/49531 ,  H01L21/56 ,  H01L21/561 ,  H01L21/76885 ,  H01L23/28 ,  H01L23/3107 ,  H01L23/3114 ,  H01L23/3675 ,  H01L23/4334 ,  H01L23/481 ,  H01L23/482 ,  H01L23/49503 ,  H01L23/49513 ,  H01L23/49541 ,  H01L23/49548 ,  H01L23/49555 ,  H01L23/49568 ,  H01L23/49575 ,  H01L23/49805 ,  H01L23/49827 ,  H01L23/49838 ,  H01L24/03 ,  H01L24/05 ,  H01L24/06 ,  H01L24/09 ,  H01L24/16 ,  H01L24/33 ,  H01L24/45 ,  H01L24/48 ,  H01L24/49 ,  H01L24/73 ,  H01L24/81 ,  H01L24/83 ,  H01L24/85 ,  H01L24/92 ,  H01L2224/03003 ,  H01L2224/03334 ,  H01L2224/0401 ,  H01L2224/04042 ,  H01L2224/04105 ,  H01L2224/0603 ,  H01L2224/06102 ,  H01L2224/06131 ,  H01L2224/06135 ,  H01L2224/06136 ,  H01L2224/06177 ,  H01L2224/09151 ,  H01L2224/12105 ,  H01L2224/16238 ,  H01L2224/32221 ,  H01L2224/32245 ,  H01L2224/45124 ,  H01L2224/45147 ,  H01L2224/48091 ,  H01L2224/48106 ,  H01L2224/48245 ,  H01L2224/48247 ,  H01L2224/49175 ,  H01L2224/73207 ,  H01L2224/73253 ,  H01L2224/73265 ,  H01L2224/81815 ,  H01L2224/85 ,  H01L2224/92127 ,  H01L2224/92242 ,  H01L2224/92247 ,  H01L2924/00014 ,  H01L2924/14 ,  H01L2924/181 ,  H01L2224/05599 ,  H01L2224/81 ,  H01L2924/00012

Abstract: An electronic device may include leads, an IC having first and second bond pads, and an encapsulation material adjacent the leads and the IC so the leads extend to a bottom surface of the encapsulation material defining first contact pads. The electronic device may include bond wires between the first bond pads and corresponding ones of the leads, and conductors extending from corresponding ones of the second bond pads to the bottom surface of the encapsulation material defining second contact pads.

公开(公告)号：US09857395B2

公开(公告)日：2018-01-02

申请号：US14955207

申请日：2015-12-01

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: G01R15/18 ,  G01R15/16 ,  G01R19/165

CPC classification number: G01R15/18 ,  G01R15/16 ,  G01R19/16538

Abstract: Current flowing through an inductor in response to a pulse width modulation (PWM) control signal is sensed to generate a sensed current. The sensed current is processed over one or more PWM cycles of the PWM control signal to generate an output signal indicative of average inductor current. This processing may include charging and discharging a capacitor at different rates dependent on the sense current, with the detection of capacitor discharge triggering a sampling of a voltage dependent on the sensed current that is indicative of average inductor current. The processing may include using the sensed to current to generate a first charge voltage associated with minimum inductor current and a second charge voltage associated with maximum inductor current, and then averaging the first and second charge voltages to generate an output signal indicative of average inductor current.

公开(公告)号：US09811101B2

公开(公告)日：2017-11-07

申请号：US14663165

申请日：2015-03-19

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Hai Bo Zhang ,  Zi Yu Zeng ,  Jerry Huang

IPC: H02M3/156 ,  H02M3/158 ,  G05F1/56 ,  H02M1/42 ,  H02M1/00

CPC classification number: G05F1/56 ,  H02M1/4225 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0022

Abstract: A power converter includes an input and an output with an energy storage circuit and a power switching circuit coupled between the input and the output. A feedback circuit generates a feedback voltage which is differentially compared to a reference in an error amplifier circuit to generate an error amplification signal. A comparator circuit generates a control signal for controlling on/off of the power switching circuit based on a first comparison signal related to the error amplification signal and a second comparison signal related to a charging current of the energy storage circuit. A regulating circuit is coupled between an output of the error amplifier circuit and an input of the comparator circuit for receiving the first comparison signal, the regulating circuit is configured to couple a voltage compensation signal related to an input voltage received by the input to an output of the error amplifier, so as to reduce a variation amount of the error amplification signal when the input voltage varies.

公开(公告)号：US09726698B2

公开(公告)日：2017-08-08

申请号：US14966129

申请日：2015-12-11

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Yijun Duan

IPC: H03L7/00 ,  G01R19/12 ,  G01R19/165 ,  H05B33/08

CPC classification number: G01R19/12 ,  G01R19/16557 ,  H05B33/0845 ,  H05B33/0887

Abstract: A bidirectional voltage differentiator circuit comprises start-up circuitry, sensing circuitry, and output circuitry coupled to logic circuitry. The start-up circuitry acts to start-up the sensing circuitry when the circuit is powered on, and accelerates the response of the sensing circuitry thereafter. The sensing circuitry senses variation in an input voltage applied to an input node. Responsive to the voltage variation sensed by the sensing circuitry, the output circuitry produces a state change at a first or second output node. The logic circuitry receives the states of the output nodes and produces a logic output signal to indicate the occurrence of the variation sensed in the input voltage. The voltage sensing circuit is operable to sense variation of the input voltage regardless of whether the voltage is rising or falling and without regard to the DC value of the input voltage.

公开(公告)号：US09667201B2

公开(公告)日：2017-05-30

申请号：US15002589

申请日：2016-01-21

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Ru Feng Du ,  Qi Yu Liu

IPC: H03F3/217 ,  H03F1/52 ,  H03F3/183 ,  H03F3/185 ,  H03F3/45 ,  H03F3/21

CPC classification number: H03F1/523 ,  H03F3/183 ,  H03F3/185 ,  H03F3/211 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/462 ,  H03F2200/78 ,  H03F2203/45512 ,  H03F2203/45528 ,  H03F2203/45594

Abstract: A class-D audio amplifier incorporates an overcurrent protection scheme implementing two overcurrent thresholds to avoid a dynamic impedance drop. When output current reaches the first threshold as a result of an impedance drop across the speaker, the overcurrent protection circuitry limits the output current to the value of the first threshold, but does not shut down the circuit. The second threshold is used to detect an overcurrent condition to shut down the circuit. Current limiting logic of a first channel monitors the overcurrent condition of a second channel and controls the first channel output in response thereto. This permits the second channel output current to reach the second threshold if the circuit is experiencing a short-circuit condition. This scheme also allows the output current to drop below the first threshold if the overcurrent condition of the second channel is caused by an impedance drop across the output speaker.

公开(公告)号：US20170149328A1

公开(公告)日：2017-05-25

申请号：US14955116

申请日：2015-12-01

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Meng Wang ,  Xue Lian Zhou

IPC: H02M3/07

CPC classification number: H02M3/07 ,  H02M2003/071

Abstract: A charge pump circuit is coupled between a positive supply node and a ground node. The charge pump circuit operates in response to clock signals output from a clock generator to produce a negative voltage at a negative voltage output node. A soft-start circuit for the charge pump circuit includes a comparison circuit configured to compare a varying intermediate voltage sensed between a rising supply voltage and the negative voltage to a ramp voltage during a start-up period of the charge pump circuit. The clock generator is selectively enabled to generate the clock signals in response to the comparison to provide for pulse-skipping.

公开(公告)号：US09608522B2

公开(公告)日：2017-03-28

申请号：US13469287

申请日：2012-05-11

Applicant: Hongwu Lin

Inventor： Hongwu Lin

IPC: G05F1/00 ,  H02M3/158 ,  H02M1/36 ,  H02M1/00

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.

公开(公告)号：US20170040889A1

公开(公告)日：2017-02-09

申请号：US14825267

申请日：2015-08-13

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Min Chen ,  Wen Liu

IPC: H02M3/08

CPC classification number: H02M3/08 ,  G05F3/205 ,  G05F3/242 ,  H03K17/302 ,  H03K2217/0018

Abstract: An electronic device includes a transistor having a body and a body biasing circuit. The body biasing circuit includes a threshold estimator circuit to estimate a threshold voltage of the transistor and a comparison circuit to compare the threshold voltage of the transistor to a reference threshold voltage and to generate a comparison signal based thereupon. A bias adjust circuit generates a body biasing voltage that biases the body of the transistor as a function of the comparison signal, the body biasing voltage being a voltage that, when applied to the body of the transistor, adjusts the threshold voltage thereof to be equal to the reference threshold voltage.

Abstract translation: 电子设备包括具有主体和主体偏置电路的晶体管。 身体偏置电路包括用于估计晶体管的阈值电压的阈值估计器电路和用于将晶体管的阈值电压与参考阈值电压进行比较的比较电路，并且基于此产生比较信号。 偏置调节电路产生作为比较信号的函数来偏置晶体管本体的主体偏置电压，主体偏置电压是当施加到晶体管的主体时将其阈值电压调整为相等的电压 到参考阈值电压。

公开(公告)号：US09525385B2

公开(公告)日：2016-12-20

申请号：US14534727

申请日：2014-11-06

Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd

Inventor： Hong Wu Lin

IPC: H03F3/38 ,  H03F1/32 ,  H03F3/185 ,  H03F3/217

CPC classification number: H03F1/3205 ,  H03F3/185 ,  H03F3/2171 ,  H03F3/2173 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2200/66

Abstract: Limiting clipping in an amplifier is accomplished in the feedback loop of a class D PWM amplifier that includes an integrator coupled to an input node and configured to generate an integrated input signal such that a comparator may then generate a PWM signal for driving an amplifier output stage based on a comparison to a triangle wave signal. To this end, the amplifier also includes a threshold signal generator for generating high and low voltage thresholds based on the triangle wave signal to be used to engage compensation circuits for limiting the overall amplification. Such compensation circuits may be bipolar junction transistors that are disposed in the feedback loop of the integrator. Thus, the overall bandwidth of the amplifier itself is not affected by adding a limiter circuit aimed at reducing clipping.

Abstract translation: 在D类PWM放大器的反馈回路中实现限幅放大器的削波，其包括耦合到输入节点并被配置为产生积分输入信号的积分器，使得比较器然后可以产生用于驱动放大器输出级的PWM信号 基于与三角波信号的比较。 为此，放大器还包括一个阈值信号发生器，用于基于三角波信号产生高和低电压阈值，以用于接合用于限制整个放大的补偿电路。 这种补偿电路可以是布置在积分器的反馈回路中的双极结型晶体管。 因此，放大器本身的总体带宽不受增加限制电路的影响，目的是减少削波。