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1. 发明申请

US20220357375A1 CURRENT SENSING CIRCUIT 有权
公开(公告)号：US20220357375A1
公开(公告)日：2022-11-10
申请号：US17655891
申请日：2022-03-22
申请人： STMicroelectronics S.r.l.
发明人： Paolo Angelini
IPC分类号： G01R19/25 , G01R15/14
摘要： In accordance with an embodiment, a method of measuring a load current flowing through a current measurement resistor coupled between a source node and a load node includes: measuring a first voltage across a replica resistor when a first end of the replica resistor is coupled to the source node and a second end of the replica resistor is coupled to a reference current source; measuring a second voltage across the replica resistor when the second end of the replica resistor is coupled to the source node and the first end of the replica resistor is coupled to the reference current source; measure a third voltage across the current sensing resistor; and calculating a corrected current measurement of the load current based on the measured first voltage, the measured second voltage and the measured third voltage.

2. 发明授权

US11075580B2 Current sensing system comprising a scaled transistor and methods of operation thereof 有权
公开(公告)号：US11075580B2
公开(公告)日：2021-07-27
申请号：US16849034
申请日：2020-04-15
申请人： STMicroelectronics S.r.l.
发明人： Roberto Pio Baorda , Stefano Ramorini , Paolo Angelini
IPC分类号： H02M3/158 , H02M1/08 , H02M1/00
摘要： A sensor comprises a first transistor comprising a first control terminal, a second transistor that is a scaled version of and connected to the first transistor and comprising a second control terminal, an operational amplifier connected to both the first and second transistors and configured to generate an intermediate signal at an output terminal, a variable current source, a current mirror, a measurement circuit, and a chopper circuit. The first and second control terminals are configured to receive a drive signal. The variable current source is configured to generate a first variable current as a function of the intermediate signal. The current mirror configured to apply a second variable current proportional to the first variable current to the second transistor. The measurement circuit is configured to generate a measurement signal indicative of current through the first transistor. The chopper circuit is configured to shift an offset of the operation amplifier.

3. 发明授权

US09389256B2 High signal to noise ratio capacitive sensing analog front-end 有权
公开(公告)号：US09389256B2
公开(公告)日：2016-07-12
申请号：US13717780
申请日：2012-12-18
申请人： STMicroelectronics Asia Pacific Pte. Ltd. , STMicroelectronics S.r.l.
发明人： Paolo Angelini , Giovanni Carlo Tripoli , Ernesto Lasalandra , Tommaso Ungaretti , Kien Beng Tan , Yannick Guedon , Dianbo Guo , Sze-Kwang Tan
IPC分类号： G06F3/044 , G01R27/26 , G06F3/041
CPC分类号： G01R27/2605 , G06F3/0418 , G06F3/044
摘要： Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise.

4. 发明申请

US20140292375A1 ANALOG ACCUMULATOR 有权
标题翻译：模拟累加器
公开(公告)号：US20140292375A1
公开(公告)日：2014-10-02
申请号：US13853870
申请日：2013-03-29
申请人： STMicroelectronics Asia Pacific Pte. Ltd. , STMicroelectronics S.r.l.
发明人： Paolo Angelini , Yannick Guedon , Ming Zi Zhu
IPC分类号： G11C27/02
CPC分类号： G06F3/044 , G03G7/00 , G06F3/0418 , G06G7/00
摘要： Accumulators that operate to fully or partially remove noise from a signal, including removing noise inserted into the signal by the accumulator itself. In some embodiments, an accumulator may be operated in a sampling phase and a transfer phase each time the accumulator samples an input signal. In some such embodiments, an op-amp of an accumulation circuit of the accumulator may be auto-zeroed during some or all of the sampling phases of an accumulation period. In some embodiments in which the op-amp is auto-zeroed during some or all of the sampling phases, the accumulation circuit may include a holding capacitor that, during an auto-zeroing process, holds a value output by the op-amp during a prior transfer phase. Including such a holding capacitor in an accumulator may reduce a voltage that the op-amp output rises following the auto-zero process, which may reduce a bandwidth and noise of the accumulation circuit.
摘要翻译：用于完全或部分地从信号中去除噪声的累加器，包括消除蓄电池本身插入到信号中的噪声。在一些实施例中，每当累加器对输入信号进行采样时，累加器可以在采样阶段和传送阶段中操作。在一些这样的实施例中，累加器的累加电路的运算放大器可以在累积周期的某些或全部采样阶段期间自动归零。在一些实施例中，在某些或所有采样相位期间运算放大器自动归零，其中累积电路可以包括保持电容器，其在自动归零过程期间保持由运算放大器输出的值先前转移阶段。在存储器中包括这种保持电容器可以降低运算放大器输出在自动归零过程之后上升的电压，这可以降低积累电路的带宽和噪声。

5. 发明申请

US20220283202A1 SENSING CIRCUIT, CORRESPONDING DEVICE AND METHOD 有权
公开(公告)号：US20220283202A1
公开(公告)日：2022-09-08
申请号：US17664522
申请日：2022-05-23
申请人： STMicroelectronics S.r.l.
发明人： Paolo Angelini , Roberto Pio Baorda , Francesco Borgioli
IPC分类号： G01R19/00 , H02J50/12 , G01R1/20 , G01R19/165
摘要： 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.

6. 发明授权

US10942228B2 Temperature compensation circuit, corresponding device and method 有权
公开(公告)号：US10942228B2
公开(公告)日：2021-03-09
申请号：US16013559
申请日：2018-06-20
申请人： STMicroelectronics S.r.l.
发明人： Paolo Angelini , Roberto Pio Baorda , Danilo Karim Kaddouri
IPC分类号： G01R33/00 , H01L27/22 , G01R33/07 , H01L43/04 , H01L43/06 , H03G3/30
摘要： A compensation circuit receives a sensing signal from a Hall sensor and outputs a compensated Hall sensing signal. The compensation circuit has a gain that is inversely proportional to Hall sensor drift mobility. The compensated Hall sensing signal is temperature-compensated.

7. 发明申请

US20140312919A1 CONFIGURABLE ANALOG FRONT-END FOR MUTUAL CAPACITANCE SENSING AND SELF CAPACITANCE SENSING 有权
标题翻译：可配置模拟前端用于电容传感和自检电感
公开(公告)号：US20140312919A1
公开(公告)日：2014-10-23
申请号：US14322244
申请日：2014-07-02
申请人： STMICROELECTRONICS ASIA PACIFIC PTE LTD , STMICROELECTRONICS S.R.L.
发明人： Kien Beng Tan , Ernesto Lasalandra , Tommaso Ungaretti , Yannick Guedon , Dianbo Guo , Paolo Angelini , Giovanni Carlo Tripoli
IPC分类号： G01R27/26 , G06F3/044
CPC分类号： G01R27/2605 , G06F3/0416 , G06F3/044 , G06F2203/04104
摘要： Capacitance sensing circuits and methods are provided. A dual mode capacitance sensing circuit includes a capacitance-to-voltage converter having an amplifier and an integration capacitance coupled between an output and an inverting input of the amplifier, and a switching circuit responsive to mutual mode control signals for a controlling signal supplied from a capacitive touch matrix to the capacitive to voltage converter in a mutual capacitance sensing mode and responsive to self mode control signals for controlling signals supplied from the capacitive touch matrix to the capacitance-to-voltage converter in a self capacitance sensing mode, wherein the capacitance sensing circuit is configurable for operation in the mutual capacitance sensing mode or the self capacitance sensing mode.
摘要翻译：提供电容感测电路和方法。双模电容感测电路包括具有放大器和耦合在放大器的输出和反相输入端之间的积分电容的电容 - 电压转换器，以及响应于从模拟信号提供的控制信号的相互模式控制信号的开关电路电容式触摸矩阵到互电容感测模式中的电容到电压转换器，并且响应于用于在自电容感测模式中控制从电容式触摸矩阵提供给电容 - 电压转换器的信号的自模式控制信号，其中电容感测电路可配置为在互电容感测模式或自身电容感测模式下工作。

8. 发明授权

US10928464B2 Temperature compensation circuit, corresponding device and method 有权
公开(公告)号：US10928464B2
公开(公告)日：2021-02-23
申请号：US16149937
申请日：2018-10-02
申请人： STMicroelectronics S.r.l.
发明人： Roberto Pio Baorda , Paolo Angelini
IPC分类号： G01R33/00 , G01R19/32 , G01R33/07 , G01R15/20
摘要： A Hall sensor compensation circuit includes an input node configured for receiving a bias signal for a Hall sensor. A bias node provides to the Hall sensor a compensated bias signal. A compensation network coupled between the input node and the bias node has a gain inversely proportional to Hall mobility, μn′, wherein the Hall sensing signal is temperature-compensated.

9. 发明授权

US10794738B2 Sensor device with integrated calibration system and calibration method 有权
公开(公告)号：US10794738B2
公开(公告)日：2020-10-06
申请号：US16049262
申请日：2018-07-30
申请人： STMICROELECTRONICS S.R.L.
发明人： Dario Paci , Francesco Procopio , Carlo Valzasina , Paolo Angelini , Francesco Diazzi , Roberto Pio Baorda , Danilo Karim Kaddouri
IPC分类号： G01K15/00 , G01D18/00 , G01K13/00 , H05B3/16 , B81C99/00 , G01R33/00 , G01R33/09
摘要： An integrated sensor device including a first die, housing a sensor element to detect a quantity external to the sensor device and transduce the external quantity into an electrical sensing signal; a second die mechanically coupled to the first die so that the first and second dies are stacked on one another along one and the same axis; and at least one heater of a resistive type integrated in the first die and/or in the second die, having a first conduction terminal and a second conduction terminal configured to couple respective first and second conduction terminals of a signal generator for causing an electric current to flow, in use, between the first and second conduction terminals of the heater and generate heat by the Joule effect. It is possible to carry out calibration in temperature of the sensor element.

10. 发明授权

US10528197B2 Current conveyor circuit, corresponding device, apparatus and method 有权
公开(公告)号：US10528197B2
公开(公告)日：2020-01-07
申请号：US15689908
申请日：2017-08-29
申请人： STMicroelectronics S.r.l.
发明人： Danilo Karim Kaddouri , Roberto Pio Baorda , Paolo Angelini
IPC分类号： G06F3/044 , G06F3/041
摘要： A circuit includes a first transistor having a control terminal and a current path between first and second current path terminals. A second transistor has a control terminal and a current path between first and second current path terminals. The first current path terminal of the first transistor is coupled to the first current path terminal of the second transistor at an intermediate point. A first current buffer has an input and an output. The input of the first current buffer is coupled to the second current path terminal of the first transistor. A second current buffer has an input and an output, the input of the second current buffer being coupled to the second current path terminal of the second transistor. A summation node is coupled to the outputs of the first and second current buffer.

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