-
131.发明授权公开(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
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
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.
-
135.发明申请公开(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
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。
-
Patent Agency Ranking
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
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。
-
137.发明授权Switching converter to operate in pulse width modulation mode or pulse skipping mode 有权开关转换器工作在脉宽调制模式或脉冲跳过模式公开(公告)号：US09423816B2
公开(公告)日：2016-08-23
申请号：US14531314
申请日：2014-11-03
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Meng Wang , Xue Lian Zhou
IPC: G05F3/26
CPC classification number: G05F3/262 , H02M1/08 , H02M3/158 , H02M2001/0032 , Y02B70/16
Abstract: An electronic device may include a switching converter configured to convert an input voltage to an output voltage, and being selectively operable in a pulse skipping mode based upon a control signal. The switching converter may include a comparator having a first input configured to receive an error signal, a second input configured to receive a skipping mode reference signal, and an output configured to generate the control signal. A reference generator may be configured to generate the skipping mode reference signal as a function of a difference between the output voltage and the input voltage.
Abstract translation: 电子设备可以包括被配置为将输入电压转换为输出电压并且可以基于控制信号以脉冲跳过模式选择性地操作的开关转换器。 开关转换器可以包括具有被配置为接收错误信号的第一输入的比较器，被配置为接收跳过模式参考信号的第二输入和被配置为产生控制信号的输出。 参考发生器可以被配置为根据输出电压和输入电压之间的差产生跳跃模式参考信号。
-
138.发明申请TWO-STAGE ERROR AMPLIFIER WITH NESTED-COMPENSATION FOR LDO WITH SINK AND SOURCE ABILITY 有权具有针对LDO的消除补偿的两级错误放大器，具有吸收和源极性公开(公告)号：US20160187902A1
公开(公告)日：2016-06-30
申请号：US14592040
申请日：2015-01-08
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Ni Zeng
IPC: G05F1/575
CPC classification number: 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.
Abstract translation: 低压差放大器可以包括分别具有耦合到参考信号和反馈信号的第一和第二输入的误差放大器。 误差放大器可以被配置为基于参考信号和反馈信号之间的差异，分别在第一和第二输出处产生第一和第二误差信号，第一和第二误差信号。 宿台可以耦合到第一输出并且被配置为基于第一误差信号产生宿电流。 源级可以耦合到第二输出并被配置为基于第二误差信号产生源电流。 输出节点可以被耦合以接收信宿和源电流。
-
139.发明授权Input clamping structure for sound quality improvement in car-radio class-AB power amplifier design 有权输入钳位结构，用于汽车无线电类AB功率放大器设计中的音质改善公开(公告)号：US09331644B2
公开(公告)日：2016-05-03
申请号：US14599701
申请日：2015-01-19
Applicant: STMICROELECTRONICS (SHENZHEN) R&D CO. LTD
Inventor： Mei Yang , YueHua Wang , Xaut Zhang , Kelvin Wen , XiangSheng Li
CPC classification number: H03F3/211 , H03F3/187 , H03F3/26 , H03F3/4508 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2203/21131 , H03F2203/45102 , H03F2203/45154 , H03F2203/45244 , H03F2203/45528 , H03F2203/45552
Abstract: A clamping circuit for a class AB amplifier includes a reference voltage circuit, four NPN Darlington transistors having inputs coupled to the reference voltage circuit, and outputs for providing four clamped voltages and a split NPN Darlington transistor having an input coupled to the reference voltage circuit, and four separate outputs for providing four AC ground voltages.
Abstract translation: 用于AB类放大器的钳位电路包括参考电压电路，具有耦合到参考电压电路的输入的四个NPN达林顿晶体管和用于提供四个钳位电压的输出和具有耦合到参考电压电路的输入的分立NPN达林顿晶体管， 和四个单独的输出，用于提供四个交流接地电压。
-
公开(公告)号：US20160065148A1
公开(公告)日：2016-03-03
申请号：US14487313
申请日：2014-09-16
Applicant: STMicroelectronics (Shenzhen) R&D Co. Ltd
Inventor： Qi Yu Liu , Ru Feng Du
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.
Abstract translation: D类音频放大器包含实现两个过流阈值的过流保护方案，以避免动态阻抗下降。 当输出电流由于扬声器上的阻抗降低而达到第一阈值时，过电流保护电路将输出电流限制在第一阈值的值，但不关闭电路。 第二个阈值用于检测过电流状态以关闭电路。 第一通道的电流限制逻辑监视第二通道的过电流状况并响应于此控制第一通道输出。 这允许第二通道输出电流达到第二阈值，如果电路正在经历短路状态。 如果第二通道的过电流状态是由输出扬声器上的阻抗下降引起的，则该方案还允许输出电流降至低于第一阈值。
-
-
-
-
-
-
-
-
-
Search Results
201
records
(took 0.023 seconds)
