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公开(公告)号：US20190238130A1
公开(公告)日：2019-08-01
申请号：US16261267
申请日：2019-01-29
Applicant: STMicroelectronics S.r.l.
Inventor： Edoardo Botti , Giovanni Gonano
IPC: H03K17/687 , H03F3/217
Abstract: A bi-directional switch circuit includes first and second transistors having their control electrodes coupled at a first common node and the current paths coupled at a second common node in an anti-series arrangement. First and second electrical paths coupled between the first common node and the first and second transistors, respectively, include first and second switches switchable between a conductive state and a non-conductive state. A third electrical path between the first and second common nodes includes a third switch switchable between a conductive state and a non-conductive state. The third switch is coupled with the first and second switches by a logical network configured to switch the third switch to the conductive state with the first and second switches switched to the non-conductive state, and to the non-conductive state with either one of the first and second switches switched to the conductive state.
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公开(公告)号：US20190238094A1
公开(公告)日：2019-08-01
申请号：US16261236
申请日：2019-01-29
Applicant: STMicroelectronics S.r.l.
Inventor： Edoardo Botti , Giovanni Gonano
Abstract: A switching circuit includes a switching circuit stage configured to supply a load via filter networks. Control circuitry is provided to control alternate switching sequences of transistors in the half-bridges of the switching circuit stage. A current flow line is provided between the output nodes of the half-bridges including an inductance between two switches. First and second capacitances are coupled with the output nodes of the half-bridges. The control circuitry switches first and second switches to the conductive state at intervals in the alternate switching sequences of the transistors in the half-bridges between switching the first pair of transistors to a non-conductive state and switching the second pair of transistors to a conductive state.
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公开(公告)号：US11463052B2
公开(公告)日：2022-10-04
申请号：US17107269
申请日：2020-11-30
Inventor： Hong Wu Lin , Giovanni Gonano , Edoardo Botti
IPC: H03F3/217 , H03K17/687 , H03K19/20 , H04R3/00
Abstract: In an embodiment, a method for shaping a PWM signal includes: receiving an input PWM signal; generating an output PWM signal based on the input PWM signal by: when the input PWM signal transitions with a first edge of the input PWM signal, transitioning the output PWM signal with a first edge of the output PWM signal; and when the input PWM signal transitions with a second edge before the first edge of the output PWM signal transitions, delaying a second edge of the output PWM signal based on the first edge of the output PWM signal.
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公开(公告)号：US20210391856A1
公开(公告)日：2021-12-16
申请号：US17322100
申请日：2021-05-17
Applicant: STMicroelectronics S.r.l.
Inventor： Marco Raimondi , Giovanni Gonano
Abstract: An embodiment pulse-width modulation (PWM) modulator circuit comprises a first half-bridge stage having a first output node and a second half-bridge stage having a second output node. The first output node and the second output node are configured to have an electrical load coupled therebetween to apply thereto a PWM-modulated output signal. The circuit comprises a differential stage having input nodes configured to receive an input signal applied between the input nodes and produce a differential control signal for the first half-bridge stage and the second half-bridge stage. A current comparator is arranged intermediate the differential stage and the first and second half-bridge stages. The current comparator is configured to produce a PWM-modulated drive signal to drive the half-bridge stages as a function of the input signal applied between the input nodes in the differential stage.
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公开(公告)号：US09973151B2
公开(公告)日：2018-05-15
申请号：US15389169
申请日：2016-12-22
Applicant: STMicroelectronics S.r.l.
Inventor： Giovanni Gonano
CPC classification number: H03F1/083 , G01R31/2825 , H03F3/183 , H03F3/217 , H03F3/2173 , H03F3/45071 , H03F3/45475 , H03F2200/03 , H03F2200/171 , H03F2200/351 , H03F2200/391 , H03F2200/393 , H03F2200/462 , H03F2203/45008 , H03F2203/45528 , H03F2203/45631 , H04R29/001
Abstract: A method can be used to measure a load driven by a switching amplifier having a differential input, an LC output demodulator filter and a feedback network between the amplifier output and the differential input. The amplifier is AC driven in a differential and in a common mode by applying a common. The feedback network provides feedback towards the differential input from downstream the LC demodulator filter by computing the impedance of the load as a function of the differential mode output current and the common mode output current. The feedback network provides feedback towards the differential input from upstream the LC demodulator filter by measuring the impedance value of the inductor of the LC demodulator filter, and computing the impedance of the load as a function of the differential mode output current, the common mode output current and the impedance value of the inductor of the LC demodulator filter.
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Patent Agency Ranking
6.发明授权Method and circuit for testing an audio high-frequency loudspeaker being part of a loudspeaker system 有权用于测试作为扬声器系统一部分的音频高频扬声器的方法和电路公开(公告)号：US09398388B2
公开(公告)日：2016-07-19
申请号：US14036506
申请日：2013-09-25
Applicant: STMicroelectronics S.r.l.
Inventor： Edoardo Botti , Giovanni Gonano , Pietro Mario Adduci
CPC classification number: H04R29/001 , H04R1/26 , H04R29/003 , H04R2420/05
Abstract: The present invention relates to a method and a circuit for testing a tweeter. The tweeter is part of a loudspeaker system. The method includes the steps of: applying a high-frequency voltage signal to one terminal of the tweeter, whereby the high-frequency voltage signal is generated by first electronic means. The method also includes applying a constant voltage signal to the other terminal of the tweeter, whereby the constant voltage signal is generated by second electronic means. The method includes measuring a current (Iload) that flows through the tweeter into the second electronic means and determining a connect/disconnect state of the tweeter from the value of the current.
Abstract translation: 本发明涉及一种用于测试高音单元的方法和电路。 高音扬声器是扬声器系统的一部分。 该方法包括以下步骤：向高音单元的一个端子施加高频电压信号，由此通过第一电子装置产生高频电压信号。 该方法还包括将恒定电压信号施加到高音单元的另一端，由此恒定电压信号由第二电子装置产生。 该方法包括测量流经高音单元的电流（Iload）到第二电子装置中，并确定高音扬声器的连接/断开状态与电流值。
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公开(公告)号：US11463078B2
公开(公告)日：2022-10-04
申请号：US17322100
申请日：2021-05-17
Applicant: STMicroelectronics S.r.l.
Inventor： Marco Raimondi , Giovanni Gonano
Abstract: An embodiment pulse-width modulation (PWM) modulator circuit comprises a first half-bridge stage having a first output node and a second half-bridge stage having a second output node. The first output node and the second output node are configured to have an electrical load coupled therebetween to apply thereto a PWM-modulated output signal. The circuit comprises a differential stage having input nodes configured to receive an input signal applied between the input nodes and produce a differential control signal for the first half-bridge stage and the second half-bridge stage. A current comparator is arranged intermediate the differential stage and the first and second half-bridge stages. The current comparator is configured to produce a PWM-modulated drive signal to drive the half-bridge stages as a function of the input signal applied between the input nodes in the differential stage.
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公开(公告)号：US10749474B2
公开(公告)日：2020-08-18
申请号：US16261236
申请日：2019-01-29
Applicant: STMicroelectronics S.r.l.
Inventor： Edoardo Botti , Giovanni Gonano
Abstract: A switching circuit includes a switching circuit stage configured to supply a load via filter networks. Control circuitry is provided to control alternate switching sequences of transistors in the half-bridges of the switching circuit stage. A current flow line is provided between the output nodes of the half-bridges including an inductance between two switches. First and second capacitances are coupled with the output nodes of the half-bridges. The control circuitry switches first and second switches to the conductive state at intervals in the alternate switching sequences of the transistors in the half-bridges between switching the first pair of transistors to a non-conductive state and switching the second pair of transistors to a conductive state.
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公开(公告)号：US11848675B2
公开(公告)日：2023-12-19
申请号：US18049852
申请日：2022-10-26
Applicant: STMicroelectronics S.r.l.
Inventor： Giovanni Gonano , Marco Raimondi
Abstract: An embodiment apparatus comprises a switching-type output power stage, a modulator circuit configured for carrying out a pulse-width modulation and converting an electrical input signal into an input signal pulsed between two electrical levels, having a mean value proportional to the amplitude of the input signal, and a circuit arrangement for controlling saturation of an output signal supplied by the switching-type output power stage. The circuit arrangement comprises a pulse-remodulator circuit, between the output of the modulator circuit and the input of the switching-type output power stage, that is configured for supplying, as a driving signal to the switching-type output power stage, a respective modulated signal pulsed between two electrical levels, measuring a pulse width as pulse time interval elapsing between two consecutive pulsed-signal edges of the pulsed input signal, and, if the measurement indicates that the latter is below a given minimum value, remodulating the pulsed input signal.
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10.发明申请公开(公告)号：US20230076765A1
公开(公告)日：2023-03-09
申请号：US18049852
申请日：2022-10-26
Applicant: STMicroelectronics S.r.l
Inventor： Giovanni Gonano , Marco Raimondi
Abstract: An embodiment apparatus comprises a switching-type output power stage, a modulator circuit configured for carrying out a pulse-width modulation and converting an electrical input signal into an input signal pulsed between two electrical levels, having a mean value proportional to the amplitude of the input signal, and a circuit arrangement for controlling saturation of an output signal supplied by the switching-type output power stage. The circuit arrangement comprises a pulse-remodulator circuit, between the output of the modulator circuit and the input of the switching-type output power stage, that is configured for supplying, as a driving signal to the switching-type output power stage, a respective modulated signal pulsed between two electrical levels, measuring a pulse width as pulse time interval elapsing between two consecutive pulsed-signal edges of the pulsed input signal, and, if the measurement indicates that the latter is below a given minimum value, remodulating the pulsed input signal.
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