公开(公告)号：US20230288946A1

公开(公告)日：2023-09-14

申请号：US17694182

申请日：2022-03-14

Applicant: STMicroelectronics S.r.I.

Inventor： Alberto Cattani ,  Alessandro Gasparini ,  Stefano Ramorini

IPC: G05F1/56

CPC classification number: G05F1/56

Abstract: In an embodiment, a method includes: providing a voltage setpoint to a voltage converter; generating an output voltage at a voltage rail with the voltage converter based on the voltage setpoint; when the voltage setpoint is transitioning from a first voltage setpoint to a second voltage setpoint that has a lower magnitude than the first voltage setpoint, providing a first constant current to a first node coupled to a control terminal of an output transistor to turn on the output transistor, where the output transistor includes a source terminal coupled to a first terminal of a first resistor, and where a current path of the output transistor is coupled to the voltage rail; and turning off the output transistor after the output voltage reaches the target output voltage corresponding to the second voltage setpoint.

公开(公告)号：US20150214841A1

公开(公告)日：2015-07-30

申请号：US14603597

申请日：2015-01-23

Applicant: STMicroelectronics S.r.I

Inventor： Stefano Ramorini ,  Alessandro Gasparini ,  Alberto Cattani

IPC: H02M3/158

CPC classification number: H02M3/158 ,  H02M1/36 ,  H02M3/1582 ,  H02M3/1584 ,  H02M3/1588 ,  H02M2001/0022 ,  H02M2001/0032 ,  Y02B70/1466 ,  Y02B70/16

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.

Abstract translation: A转换器包括被配置为接收输入信号的电感器和被配置为向负载提供输出信号的输出。 转换器用于对电感器充电，直到在不提供电气负载的第一操作条件期间达到最大预设电流值。 接下来，转换器通过在第二操作条件的第一时间间隔期间部分地放电电感器来主动地供应电负载。 然后，通过完全放电电感器，在第二工作状态的第一时间间隔之后的第二时间间隔内，转换器被动地提供电感负载。

公开(公告)号：US20140084876A1

公开(公告)日：2014-03-27

申请号：US14036751

申请日：2013-09-25

Applicant: STMicroelectronics S.r.I.

Inventor： Stefano Ramorini ,  Alessandro Gasparini ,  Alberto Cattani

IPC: H02J15/00

CPC classification number: H02J15/00 ,  H02M3/1588 ,  H02M7/04 ,  H02M7/217 ,  H02M2001/0009 ,  H02N2/181 ,  Y02B70/1466

Abstract: An energy-scavenging interface includes first and second switches connected in series between an input and reference, and third and fourth switches connected in series between the input and an output. A control circuit closes the first and second switches and opens the third switch for a first time interval to store charge in a storage element. A scaled copy of a peak value of the charging current is obtained. The control circuit then opens the first switch and closes the third and fourth switches to generate an output signal as long as the value in current of the output signal is higher than the value of said scaled copy of the peak value.

Abstract translation: 能量清除界面包括在输入和参考之间串联连接的第一和第二开关以及串联连接在输入和输出之间的第三和第四开关。 控制电路关闭第一和第二开关并打开第一开关第一时间间隔以将电荷存储在存储元件中。 获得充电电流的峰值的缩放副本。 只要输出信号的电流值高于峰值的缩放副本的值，控制电路就打开第一开关并闭合第三和第四开关以产生输出信号。

公开(公告)号：US20140139029A1

公开(公告)日：2014-05-22

申请号：US13683937

申请日：2012-11-21

Applicant: STMICROELECTRONICS S.R.I.

Inventor： Alessandro Gasparini ,  Andrea Donadel ,  Stefano Ramorini

IPC: H02J1/00

CPC classification number: G06F1/26 ,  Y10T307/696

Abstract: A dual input single output (DISO) regulator, includes a comparator configured to receive a first and second power supply signal and to provide a first compared signal; a first switch configured to couple the first power supply source to an intermediate node, and a second switch configured to couple the second power supply source to the intermediate node; a control logic circuit, coupled to the first comparator, to the first switch, and to the second switch, and configured to receive the compared signal to control the first and the second switch in a first and second operating condition based on the compared signal. The intermediate node being biased by an intermediate power supply signal correlated to the first or second power supply signal. The DISO regulator includes a low-dropout regulator, configured to provide a regulated power supply signal based on the intermediate power supply signal.

Abstract translation: 双输入单输出（DISO）调节器包括比较器，被配置为接收第一和第二电源信号并提供第一比较信号; 配置为将第一电源耦合到中间节点的第一开关和被配置为将第二电源耦合到中间节点的第二开关; 耦合到第一比较器的控制逻辑电路连接到第一开关和第二开关，并且被配置为接收比较的信号，以基于所比较的信号在第一和第二操作条件下控制第一和第二开关。 中间节点被与第一或第二电源信号相关的中间电源信号偏置。 DISO调节器包括一个低压差稳压器，配置成基于中间电源信号提供稳压电源信号。

公开(公告)号：US20140093089A1

公开(公告)日：2014-04-03

申请号：US14030584

申请日：2013-09-18

Applicant: STMicroelectronics S.r.I.

Inventor： Alessandro Gasparini ,  Daniele Depascalis

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H04R19/013 ,  H04R29/001

Abstract: A MEMS speaker device including a membrane that forms a first capacitor and a second capacitor, respectively, with a top plate and with a bottom plate. The device includes a driving circuit that operates, during a first operating period, to move the membrane into a first position, in which the membrane is close to the bottom plate, and during a second operating period, to move the membrane into a second position, in which the membrane is close to the top plate. The device includes a testing circuit having a measuring circuit, which generates a first signal, based on a capacitance of one of the first capacitor and the second capacitor and a second signal based on a capacitance of one of the first capacitor and the second capacitor; and a comparator, which compares the first and second signals with at least one first electrical reference quantity.

Abstract translation: 一种MEMS扬声器装置，包括分别与顶板和底板形成第一电容器和第二电容器的膜。 该装置包括驱动电路，该驱动电路在第一操作期间操作以将膜移动到第一位置，其中膜靠近底板，并且在第二操作期间，将膜移动到第二位置 ，其中膜接近顶板。 该装置包括具有测量电路的测试电路，其基于第一电容器和第二电容器之一的电容产生第一信号，基于第一电容器和第二电容器之一的电容产生第二信号; 以及比较器，其将第一和第二信号与至少一个第一电参考量进行比较。

公开(公告)号：US20140084900A1

公开(公告)日：2014-03-27

申请号：US14036458

申请日：2013-09-25

Applicant: STMicroelectronics S.r.I.

Inventor： Stefano Ramorini ,  Alessandro Gasparini ,  Alberto Cattani

IPC: H02M3/155 ,  F03G5/06

CPC classification number: H02M3/155 ,  F03G5/06 ,  H01F27/40 ,  H02M1/32 ,  H02M1/4208 ,  H02M3/158 ,  H02M7/06 ,  H02M7/068 ,  H02M7/217 ,  Y02B70/126

Abstract: An energy-scavenging interface receives an input signal from a transducer and supplies an output signal to a load. A switch is connected between the transducer and a reference node, and a diode is connected between the transducer and the load. A control circuit closes the switch for a time interval to permit energy storage in the transducer. A scale copy of a peak value of stored electric current is obtained. The switch is opened when the time interval elapses and the stored energy exceeds a threshold. The stored energy is then released to supply the load through the diode. The switch remains open as long as the value of current in the output signal exceeds the value of the scaled copy of the peak value.

Abstract translation: 能量清除界面接收来自换能器的输入信号并将输出信号提供给负载。 开关连接在传感器和参考节点之间，二极管连接在传感器和负载之间。 控制电路将开关闭合一段时间间隔，以允许传感器中的能量存储。 获得存储电流的峰值的比例拷贝。 当经过时间间隔并且存储的能量超过阈值时，开关被打开。 然后释放存储的能量以通过二极管提供负载。 只要输出信号中的电流值超过峰值的缩放副本的值，开关就保持打开。

公开(公告)号：US20130279721A1

公开(公告)日：2013-10-24

申请号：US13921033

申请日：2013-06-18

Applicant: STMicroelectronics S.r.I.

Inventor： Filippo David ,  Alessandro Gasparini

IPC: G05F1/46

CPC classification number: G05F1/467 ,  H02M3/07

Abstract: A biasing circuit for an acoustic transducer is provided with: a voltage-booster stage, which supplies, on a biasing terminal, a boosted voltage for biasing a first terminal of the acoustic transducer; and filtering elements, set between the biasing terminal and the acoustic transducer, for filtering disturbances on the boosted voltage. The biasing circuit is further provided with switches, which can be actuated so as to connect the first terminal to the biasing terminal of the voltage-booster stage, directly during a start-up step of the biasing circuit, and through the filtering elements at the end of the start-up step.

Abstract translation: 用于声学换能器的偏置电路设置有：升压级，其在偏置端子上提供用于偏置声换能器的第一端的升压电压; 以及设置在偏置端子和声换能器之间的滤波元件，用于滤波升压电压上的干扰。 偏置电路还设置有开关，其可被致动以便在偏置电路的启动步骤期间直接将偏置端子连接到升压级的偏置端子，并且通过滤波元件 启动步骤结束。