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公开(公告)号：US11075580B2
公开(公告)日：2021-07-27
申请号：US16849034
申请日：2020-04-15
Applicant: STMicroelectronics S.r.l.
Inventor： Roberto Pio Baorda , Stefano Ramorini , Paolo Angelini
Abstract: 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.
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公开(公告)号：US10566940B2
公开(公告)日：2020-02-18
申请号：US16539478
申请日：2019-08-13
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Alberto Cattani , Germano Nicollini , Alessandro Gasparini
Abstract: A switching amplifier, such as a Class D amplifier, includes a current sensing circuit. The current sensing circuit is formed by replica loop circuits that are selectively coupled to corresponding output inverter stages of the switching amplifier. The replica loop circuits operated to produce respective replica currents of the output currents generated by the output inverter stages. A sensing circuitry is coupled to receive the replica currents from the replica loop circuits and operates to produce an output sensing signal as a function of the respective replica currents.
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公开(公告)号：US10326418B2
公开(公告)日：2019-06-18
申请号：US15982548
申请日：2018-05-17
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Alberto Cattani , Alessandro Gasparini , Germano Nicollini
Abstract: A circuit includes an input transistor pair with first and second input transistors, the first input transistor having a control terminal configured to receive an input signal and a cascode transistor pair including a first and second cascode transistors having a common control node. A bias circuit has a bias input configured to receive the input signal and a first bias output coupled to the common node of the first and second cascode transistors. The bias circuit includes a signal tracking circuit operating to generate the first bias output to track the input signal. A pair of load transistors are coupled to the input transistor pair and biased by a second bias output of the bias circuit.
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公开(公告)号：US10211722B2
公开(公告)日：2019-02-19
申请号：US15132958
申请日：2016-04-19
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Alessandro Gasparini , Alberto Cattani
Abstract: An energy harvesting interface receives an electrical signal from an inductive transducer and outputs a supply signal. An input branch includes a first switch and a second switch connected in series between a first input terminal and an output terminal, and further a third switch and a fourth switch connected in series between a second input terminal and the output terminal. A first electrical-signal-detecting device coupled across the second switch detects a first threshold value of an electric storage current in the inductor of the transducer. A second electrical-signal-detecting device coupled across the fourth switch detects whether the electric supply current that flows through the fourth switch reaches a second threshold value lower than the first threshold value.
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公开(公告)号：US10116208B2
公开(公告)日：2018-10-30
申请号：US14603597
申请日：2015-01-23
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Alessandro Gasparini , Alberto Cattani
Abstract: A converter includes an inductor configured to receive an input signal and output configured to supply an electrical load with an output signal. The converter operates to charge the inductor until a maximum pre-set current value is reached during a first operating condition in which the electrical load is not supplied. Next, the converter actively supplies the electrical load by partially discharging the inductor during a first time interval of a second operating condition. Then, the converter passively supplies the electrical load by the residual charge of the inductor during a second time interval, subsequent to the first time interval, of the second operating condition, by discharging the inductor completely.
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Patent Agency Ranking
16.发明授权High-efficiency energy harvesting interface and corresponding energy harvesting system 有权高效能量采集接口和相应的能量采集系统公开(公告)号：US09379615B2
公开(公告)日：2016-06-28
申请号：US14749254
申请日：2015-06-24
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Stefano Ramorini , Alessandro Gasparini , Alberto Cattani
Abstract: An electrical-energy harvesting system envisages a transducer for converting energy from an environmental energy source into a transduced signal, an electrical energy harvesting interface for receiving the transduced signal and for supplying a harvesting signal, and an energy storage element coupled to the electrical energy harvesting interface for receiving the harvesting signal. The electrical-energy harvesting system also includes a voltage converter connected to the electrical energy harvesting interface for generating a regulated voltage. The harvesting interface samples an open-circuit voltage value of the transduced signal, generates an optimized voltage value starting from the open-circuit voltage value, and generates an upper threshold voltage and a lower threshold voltage on the basis of the optimized voltage value. The harvesting interface controls the voltage converter in switching mode so that the harvesting signal has a value between the upper and lower threshold voltages in at least one operating condition.
Abstract translation: 电能收集系统设想用于将来自环境能源的能量转换成转换信号的换能器，用于接收转换信号并用于提供收获信号的电能收集界面，以及耦合到电能收集的能量存储元件 用于接收收获信号的接口。 电能收集系统还包括连接到电能收集界面的电压转换器，用于产生调节电压。 采集接口采样转换信号的开路电压值，从开路电压值开始产生优化的电压值，并根据优化电压值生成上阈值电压和下阈值电压。 采集接口以开关模式控制电压转换器，使得收集信号在至少一个操作条件下具有在上限和下限阈值电压之间的值。
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17.发明申请SINGLE INDUCTOR DC-DC CONVERTER WITH REGULATED OUTPUT AND ENERGY HARVESTING SYSTEM 有权单电源DC-DC转换器与调节输出和能量采集系统公开(公告)号：US20160099582A1
公开(公告)日：2016-04-07
申请号：US14505029
申请日：2014-10-02
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Alessandro Gasparini , Alberto Cattani
IPC: H02J7/00
CPC classification number: H02J7/007 , H02J7/0052 , H02J7/345 , H02J2007/0059 , H02M3/158 , H02M2001/009
Abstract: An energy harvesting circuit receives an input voltage from a transducer and uses a single inductor operating in a DC-DC converter charging mode to generate charging current at a first output coupled to an energy storage device where a supply voltage is stored. The energy harvesting circuit further receives the supply voltage from the energy storage device and uses the same single inductor operating in a DC-DC converter regulating mode to generate load current at a second output where a regulated load voltage is provided. The energy harvesting circuit switches between the charging mode and the regulating mode in accordance with a discontinuous mode (DCM) control process.
Abstract translation: 能量收集电路接收来自换能器的输入电压，并使用以DC-DC转换器充电模式工作的单个电感器，在耦合到存储电源电压的能量存储装置的第一输出处产生充电电流。 能量收集电路还从能量存储装置接收电源电压，并且使用以DC-DC转换器调节模式工作的相同的单个电感器，以在提供调节负载电压的第二输出端产生负载电流。 能量收集电路根据不连续模式（DCM）控制过程在充电模式和调节模式之间切换。
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公开(公告)号：US12273030B2
公开(公告)日：2025-04-08
申请号：US17963534
申请日：2022-10-11
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini
Abstract: A power switch current sensing circuit includes matching first and second transistors having sources connected to first and second terminals, respectively, of the power switch. A current mirror has a first node coupled to a drain of the first transistor and a second node coupled to a drain of the second transistor. The current mirror sinks a current from the first node equal to a current flowing through the second transistor. A biasing circuit provides a same biasing voltage to the control terminals of the first and second transistors. An output resistance is coupled between the first node and a reference voltage node. A difference between a current flowing through the first transistor and the current sunk by the current mirror circuit from the first node flows through the output resistance. An output voltage produced at the first node is indicative of the current flowing through the power switch.
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公开(公告)号：US11057028B2
公开(公告)日：2021-07-06
申请号：US16559118
申请日：2019-09-03
Applicant: STMicroelectronics S.r.l.
Inventor： Alessandro Bertolini , Alberto Cattani , Stefano Ramorini , Alessandro Gasparini
Abstract: A DC-DC converter includes clock generation circuitry generating first and second clock signals that are out of phase, and a control signal generator generating a switching control signal at an edge of the second clock signal based upon a comparison of an error voltage to a summed voltage. Boost circuitry charges an energy storage component during an on-phase and discharges the energy storage component during an off-phase to thereby generate an output voltage. The on-phase and off-phase are set as a function of the switching control signal. Sum voltage generation circuitry generates a ramp voltage in response to an edge of the first clock signal and generates the summed voltage at an edge of the second clock signal. The sum voltage represents a sum of the ramp voltage and a voltage representative of the current flowing in the energy storage component during the on-phase.
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20.发明申请公开(公告)号：US20200244168A1
公开(公告)日：2020-07-30
申请号：US16849034
申请日：2020-04-15
Applicant: STMicroelectronics S.r.l.
Inventor： Roberto Pio Baorda , Stefano Ramorini , Paolo Angelini
Abstract: 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.
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