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公开(公告)号：US11171620B2
公开(公告)日：2021-11-09
申请号：US16785831
申请日：2020-02-10
Applicant: STMicroelectronics S.r.l.
Inventor： Germano Nicollini
IPC: H03F3/45
Abstract: A high-to-low voltage interface circuit includes a differential circuit stage with a differential amplifier circuit having inverting and non-inverting inputs coupled to first and second input pads as well as a differential output having first and second output nodes. A pair of bias amplifier stages sensitive to the common mode voltage of the differential amplifier circuit are arranged in first and second current mirror paths from the first and second input pads to the inverting/non-inverting inputs of the differential amplifier circuit, respectively. The bias amplifier stages are configured to maintain the first input pad and the second input pad of the differential circuit stage at the common mode voltage.
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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：US10389376B2
公开(公告)日：2019-08-20
申请号：US16020678
申请日：2018-06-27
Applicant: STMicroelectronics S.r.l.
Inventor： Luigino D'Alessio , Germano Nicollini
Abstract: In some embodiments, a circuit for use in devices involving digital-to-analog conversion of signals includes: a capacitive digital-to-analog converter array and an amplifier. The capacitive digital-to-analog converter includes an input port for receiving a digital input signal and an output port. The amplifier includes capacitive feedback loops that include a first capacitor coupling the output of the amplifier with the input of the amplifier and a second capacitor coupled to the output port of the digital-to-analog converter array at the input of the amplifier. The circuit further includes a set of switches that include a first switch and a second switch coupled with opposed ends of the second capacitor at the input and at the output of the amplifier, respectively.
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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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15.发明授权公开(公告)号：US10177720B2
公开(公告)日：2019-01-08
申请号：US15156172
申请日：2016-05-16
Applicant: STMICROELECTRONICS S.R.L.
Inventor： Germano Nicollini , Marco Garbarino
IPC: H03F1/34 , G01C19/56 , H03K5/1536 , H03K17/22 , H03F3/45 , H03F1/30 , H03F3/70 , G01C19/5776
Abstract: An electronic circuit for amplifying signals with two components in phase quadrature, which includes: a feedback amplifier with a feedback capacitor; a switch that drives charging and discharging of the feedback capacitor; an additional capacitor; and a coupling circuit, which alternatively connects the additional capacitor in parallel to the feedback capacitor or else decouples the additional capacitor from the feedback capacitor. The switch opens at a first instant, where a first one of the two components assumes a first zero value; the coupling circuit decouples the additional capacitor from the feedback capacitor in a way synchronous with a second instant, where the first component assumes a second zero value.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20180139536A1
公开(公告)日：2018-05-17
申请号：US15868480
申请日：2018-01-11
Applicant: STMicroelectronics S.r.l.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: An amplifier circuit, for a capacitive acoustic transducer defining a sensing capacitor that generates a sensing signal as a function of an acoustic signal, has a first input terminal and a second input terminal, which are coupled to the sensing capacitor and: a dummy capacitor, which has a capacitance corresponding to a capacitance at rest of the sensing capacitor and a first terminal connected to the first input terminal; a first amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second amplifier, which is coupled at input to a second terminal of the dummy capacitor and defines a second differential output of the circuit; and a feedback stage, which is coupled between the differential outputs and the first input terminal, for feeding back onto the first input terminal a feedback signal, which has an amplitude that is a function of the sensing signal and is in phase opposition with respect thereto.
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公开(公告)号：US09706312B2
公开(公告)日：2017-07-11
申请号：US14850714
申请日：2015-09-10
Applicant: STMicroelectronics S.R.L.
Inventor： Germano Nicollini
CPC classification number: H04R19/04 , H04R1/04 , H04R19/005 , H04R2201/003
Abstract: A sensing circuit includes: a follower transistor, having a control terminal; a follower terminal for connection to a load; a bias-current generator, coupled to the follower terminal; and a feedback stage, configured to control the bias-current generator as a function of an input signal on the control terminal of the follower transistor.
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公开(公告)号：US09634628B2
公开(公告)日：2017-04-25
申请号：US14960155
申请日：2015-12-04
Applicant: STMicroelectronics S.R.L.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: An amplifier circuit, for a capacitive acoustic transducer defining a sensing capacitor that generates a sensing signal as a function of an acoustic signal, has a first input terminal and a second input terminal, which are coupled to the sensing capacitor and: a dummy capacitor, which has a capacitance corresponding to a capacitance at rest of the sensing capacitor and a first terminal connected to the first input terminal; a first buffer amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second buffer amplifier, which is coupled at input to a second terminal of the dummy capacitor and defines a second differential output of the circuit; and a feedback stage, which is coupled between the differential outputs and the first input terminal, for feeding back onto the first input terminal a feedback signal, which has an amplitude that is a function of the sensing signal and is in phase opposition with respect thereto.
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19.发明申请DIFFERENTIAL AMPLIFIER CIRCUIT FOR A CAPACITIVE ACOUSTIC TRANSDUCER AND CORRESPONDING CAPACITIVE ACOUSTIC TRANSDUCER 有权用于电容式声学传感器和相应的电容式声学传感器的差分放大器电路公开(公告)号：US20160352294A1
公开(公告)日：2016-12-01
申请号：US14960155
申请日：2015-12-04
Applicant: STMicroelectronics S.R.L.
Inventor： Germano Nicollini , Andrea Barbieri
CPC classification number: H04R3/007 , B06B1/0292 , H03F3/181 , H03F3/187 , H03F3/45076 , H03F3/45475 , H03F2200/03 , H03F2203/45112 , H03F2203/45116 , H04R3/00 , H04R19/005 , H04R19/04 , H04R29/004 , H04R2410/03 , H04R2499/11
Abstract: An amplifier circuit, for a capacitive acoustic transducer defining a sensing capacitor that generates a sensing signal as a function of an acoustic signal, has a first input terminal and a second input terminal, which are coupled to the sensing capacitor and: a dummy capacitor, which has a capacitance corresponding to a capacitance at rest of the sensing capacitor and a first terminal connected to the first input terminal; a first buffer amplifier, which is coupled at input to the second input terminal and defines a first differential output of the circuit; a second buffer amplifier, which is coupled at input to a second terminal of the dummy capacitor and defines a second differential output of the circuit; and a feedback stage, which is coupled between the differential outputs and the first input terminal, for feeding back onto the first input terminal a feedback signal, which has an amplitude that is a function of the sensing signal and is in phase opposition with respect thereto.
Abstract translation: 一种放大器电路，用于定义感测电容器的电容式声学换能器，其产生作为声学信号的函数的感测信号，具有耦合到感测电容器的第一输入端子和第二输入端子，以及虚拟电容器， 其具有对应于感测电容器静止时的电容的电容器和连接到第一输入端子的第一端子; 第一缓冲放大器，其在输入端耦合到第二输入端子并且限定电路的第一差分输出; 第二缓冲放大器，其在输入端耦合到虚拟电容器的第二端子并且限定电路的第二差分输出; 以及反馈级，其耦合在差分输出和第一输入端之间，用于向第一输入端反馈反馈信号，该反馈信号具有作为感测信号的函数的幅度并且相对于其相位相反 。
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公开(公告)号：US11531365B2
公开(公告)日：2022-12-20
申请号：US17380542
申请日：2021-07-20
Applicant: STMicroelectronics S.r.l.
Inventor： Stefano Ramorini , Germano Nicollini
Abstract: A bandgap circuit includes a supply node as well as a first and second bipolar transistors having jointly coupled base terminal at a bandgap node providing a bandgap voltage. First and second current generators are coupled to the supply node and supply mirrored first and second currents, respectively, to first and second circuit nodes. A third circuit node is coupled to the first bipolar transistor via a first resistor and coupled to ground via a second resistor, respectively. The third circuit node is also coupled to the second bipolar transistor so that the second resistor is traversed by a current which is the sum of the currents through the bipolar transistors. A decoupling stage intermediate the current generators and the bipolar transistors includes first and second cascode decoupling transistors having jointly coupled control terminals receiving a bias voltage sensitive to the bandgap voltage.
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