公开(公告)号：US20140190258A1

公开(公告)日：2014-07-10

申请号：US14151426

申请日：2014-01-09

Applicant: STMicroelectronics S.r.l.

Inventor： Andrea Donadel ,  Davide Magnoni ,  Marco Garbarino

IPC: G01C19/5776

CPC classification number: G01C19/5776 ,  G01C19/5726

Abstract: A gyroscope includes: a mass, which is movable with respect to a supporting body; a driving loop for keeping the mass in oscillation according to a driving axis; a reading device, which supplying an output signal indicating an angular speed of the body; and a compensation device, for attenuating spurious signal components in quadrature with respect to a velocity of oscillation of the mass. The reading device includes an amplifier, which supplies a transduction signal indicating a position of the mass according to a sensing axis. The compensation device forms a control loop with the amplifier, extracts from the transduction signal an error signal representing quadrature components in the transduction signal, and supplies to the amplifier a compensation signal such as to attenuate the error signal.

Abstract translation: 陀螺仪包括：可相对于支撑体移动的质量块; 用于根据驱动轴保持质量在振荡中的驱动回路; 读取装置，其提供表示身体的角速度的输出信号; 以及补偿装置，用于相对于质量的振荡速度衰减正交的寄生信号分量。 读取装置包括放大器，其根据感测轴提供指示质量位置的换能信号。 补偿装置与放大器形成控制回路，从换能信号中提取表示换能信号中的正交分量的误差信号，并向放大器提供补偿信号，以便衰减误差信号。

公开(公告)号：US11366140B2

公开(公告)日：2022-06-21

申请号：US17102037

申请日：2020-11-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli ,  Marco Garbarino

IPC: G01R19/00 ,  H02J50/12 ,  G01R1/20 ,  G01R19/165

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

公开(公告)号：US20210165023A1

公开(公告)日：2021-06-03

申请号：US17102037

申请日：2020-11-23

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Angelini ,  Roberto Pio Baorda ,  Francesco Borgioli ,  Marco Garbarino

IPC: G01R19/00 ,  G01R19/165 ,  H02J50/12 ,  G01R1/20

Abstract: A current measurement circuit, for wireless charging systems, for instance, comprises a differential input configured to have applied an input voltage sensed across a shunt resistor traversed by a current to be measured, a voltage reversal switch arrangement selectively switchable to reverse the polarity of the input voltage as applied between a first and a second voltage sensing nodes as well as a first and a second current flow line between the voltage sensing nodes and ground. A difference resistor intermediate the two current flow lines is traversed by a current which is a function of the input voltage as applied to the first and second sensing nodes via the voltage reversal switch arrangement. First and second current sensing nodes at the two current flow lines are coupled to a differential current output via a current reversal switch arrangement selectively switchable to reverse the output current polarity.

公开(公告)号：US09455668B1

公开(公告)日：2016-09-27

申请号：US14947908

申请日：2015-11-20

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Marco Garbarino ,  Andrea Donadel

IPC: H03F3/52 ,  H03F1/02 ,  H03F3/45

CPC classification number: H03F1/0205 ,  H03F3/45475 ,  H03F3/45968 ,  H03F2200/171 ,  H03F2203/45116 ,  H03F2203/45521 ,  H03F2203/45526

Abstract: A method and apparatus for compensating current leakage is disclosed. In the method and apparatus, a differential amplifier receives a first input signal and a second input signal and outputs a first output signal and a second output signal. The first output signal is filtered to obtain a first filtered signal. The first filtered signal is compared to the first input signal and a first compensation signal is outputted having a first voltage that is a function of a difference between a voltage of the first filtered signal and a voltage of the first input signal. Current leakage in the first input signal is compensated for using the first compensation signal.

Abstract translation: 公开了一种用于补偿电流泄漏的方法和装置。 在该方法和装置中，差分放大器接收第一输入信号和第二输入信号，并输出第一输出信号和第二输出信号。 对第一输出信号进行滤波以获得第一滤波信号。 将第一滤波信号与第一输入信号进行比较，并输出具有作为第一滤波信号的电压与第一输入信号的电压之差的函数的第一电压的第一补偿信号。 使用第一补偿信号补偿第一输入信号中的电流泄漏。

公开(公告)号：US09146109B2

公开(公告)日：2015-09-29

申请号：US13685364

申请日：2012-11-26

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Magnoni ,  Marco Garbarino ,  Andrea Donadel

IPC: G01C19/56 ,  G01C19/5726

CPC classification number: G01C19/5726 ,  G01C19/56

Abstract: A driving device of a driving mass of a gyroscope comprises a differential read amplifier to supply first signals indicating a rate of oscillation of the driving mass; a variable-gain amplifier to supply second signals to drive the driving mass based on said first signals; a voltage elevator providing a power supply signal to the variable-gain amplifier; a controller generating a first control signal to control a gain of the variable-gain amplifier; and a first comparator, coupled to the variable-gain amplifier, generating a second control signal based on a comparison of the first control signal with a threshold, the second control signal controlling at least one among: (i) the variable-gain amplifier in such a way that the gain is increased only during the start-up phase of the gyroscope, and (ii) the voltage elevator in such a way that the power supply signal is increased only during the start-up phase.

Abstract translation: 陀螺仪的驱动质量的驱动装置包括差分读取放大器，用于提供表示驱动质量的振荡速率的第一信号; 可变增益放大器，用于根据所述第一信号提供第二信号以驱动所述驱动质量; 向可变增益放大器提供电源信号的电压升降器; 产生控制可变增益放大器的增益的第一控制信号的控制器; 以及耦合到所述可变增益放大器的第一比较器，基于所述第一控制信号与阈值的比较产生第二控制信号，所述第二控制信号控制以下中的至少一个：（i）所述可变增益放大器 这样一种方式使增益仅在陀螺仪的启动阶段增加，和（ii）电压升降机使得电源信号仅在起动阶段增加。