公开(公告)号：US20130265855A1

公开(公告)日：2013-10-10

申请号：US13907493

申请日：2013-05-31

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Ugo Ghisu ,  Antonio Ricciardo ,  Sandro Rossi

IPC: H03K5/08 ,  H04B11/00

CPC classification number: H03K5/084 ,  H03K17/102 ,  H03K17/6872 ,  H03K17/6874 ,  H03K17/693 ,  H03K2217/0054 ,  H04B11/00

Abstract: A switching circuit for transmission channel for ultrasound applications is electrically coupled between a connection terminal and a low voltage output terminal. The switching circuit includes a receiving switch, a high voltage clamp circuit electrically coupled between the connection terminal and a central node, and a low voltage clamping switch electrically coupled between said central node and a reference voltage. The receiving switch is a low voltage switch and is electrically coupled between the central node and the low voltage output terminal. The clamping switch and the receiving switch are controlled in a complementary way with respect to each other. A transmission channel for ultrasound applications includes the switching circuit

Abstract translation: 用于超声应用的传输通道的切换电路电耦合在连接端子和低电压输出端子之间。 开关电路包括接收开关，电连接在连接端子和中心节点之间的高电压钳位电路以及电耦合在所述中心节点和参考电压之间的低压钳位开关。 接收开关是低压开关，并且电耦合在中心节点和低压输出端子之间。 夹紧开关和接收开关以互补的方式相互控制。 用于超声应用的传输通道包括开关电路

公开(公告)号：US11888397B2

公开(公告)日：2024-01-30

申请号：US17531024

申请日：2021-11-19

Applicant: STMicroelectronics S.r.l.

Inventor： Niccolo' Brambilla ,  Sandro Rossi ,  Valeria Bottarel

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/158 ,  H02M1/0009

Abstract: A DC-DC switching converter includes power switches selectively coupling an output terminal with a first voltage or with a second voltage. A driver stage is coupled with the power switches for driving the power switches. A driver control stage is coupled with the driver stage for controlling the operation of the driver stage. An output current sensing circuit is coupled with the output terminal and with the driver control stage, and is configured to sense a sign of an output current delivered by the DC-DC switching converter at the output terminal and to generate control signals for the driver control stage. The driver control stage controls the operation of the driver stage according to states of the control signals received from the output current sensing circuit, for selectively delaying the activation of the power switches depending on the sensed sign of the output current.

公开(公告)号：US20220166321A1

公开(公告)日：2022-05-26

申请号：US17532867

申请日：2021-11-22

Applicant: STMicroelectronics S.r.l.

Inventor： Niccolo' Brambilla ,  Sandro Rossi ,  Valeria Bottarel ,  Alessandro Nicolosi

IPC: H02M3/158 ,  H02M1/08 ,  H02M1/00 ,  H03K17/687

Abstract: In an embodiment, a switching converter includes: a switching stage configured to receive a direct current input voltage, receive a driving signal for driving the switching stage, and provide a direct current output voltage according to the input voltage and the driving signal; a driving stage configured to provide the driving signal to the switching stage; a current sensing circuit configure to sense an output current provided by the switching stage; and a voltage generation circuit configured to generate at least one supply voltage for powering the driving stage, and adjust the at least one supply voltage according to the output current.

公开(公告)号：US20220166320A1

公开(公告)日：2022-05-26

申请号：US17532833

申请日：2021-11-22

Applicant: STMicroelectronics S.r.l.

Inventor： Niccolo' Brambilla ,  Sandro Rossi ,  Valeria Bottarel ,  Alessandro Nicolosi

IPC: H02M3/158 ,  H02M1/00

Abstract: In an embodiment, a switching converter includes: a switching stage including first and second switching devices for receiving an input voltage and for providing an output voltage; a driving stage including first and second driving devices for driving the first and second switching devices, respectively; a current sensing arrangement for sensing an output current provided by the switching stage; a voltage generation arrangement configured to generate a supply voltage for powering the driving stage, the voltage generation arrangement being configured to adjust the supply voltage according to the sensed output current; and a charge recovery stage configured to store a first electric charge being lost from the first driving device during driving of the first switching device and to release at least partially the stored first electric charge to the second driving device during driving of the second switching device.

公开(公告)号：US10730073B2

公开(公告)日：2020-08-04

申请号：US15691292

申请日：2017-08-30

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Ugo Ghisu ,  Sandro Rossi ,  Andrea Gambero

IPC: H04B1/02 ,  B06B1/02 ,  G01S15/89 ,  G01S7/524 ,  G01S7/52 ,  B06B1/06

Abstract: A circuit for an ultrasonic channel has a first and a second terminal between which extend a resistive and diode signal paths including a pair of diodes with opposing polarities, for example in anti-parallel. Switching circuitry is coupled with the resistive and diode signal paths and is switchable between first and second states. In the first state, the first and the second terminals are coupled with one another via the resistive signal path. In the second state, the first and the second terminals are coupled with one another via the diode signal path. The switching circuitry includes first and second transistor discharge circuits coupled between first and second drive lines and current paths of these transistors, and coupled to control terminals of these transistors. The control terminals are coupled to the first or second drive line and are non-conductive and conductive in first and second operating states, respectively.

公开(公告)号：US20180248544A1

公开(公告)日：2018-08-30

申请号：US15690963

申请日：2017-08-30

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Ugo Ghisu ,  Sandro Rossi ,  Andrea Gambero

IPC: H03K17/567 ,  H03K5/08 ,  A61B8/00

CPC classification number: H03K17/567 ,  A61B8/54 ,  B06B1/0215 ,  B06B2201/77 ,  H03K5/023 ,  H03K5/08

Abstract: A driver circuit for driving, for example, ultrasonic transducers in medical equipment, such as ultrasound scanning equipment. The driver circuit includes first inputs receptive of a pulsed signal, second inputs receptive of an analog signal, an output for applying a pulsed drive signal or an analog drive signal to a load. A pair of output transistors of complementary polarities are positioned with their current paths in series between opposing supply lines with a connection point intermediate between the transistors of the pair of transistors. The connection point between output transistors is coupled to the output of the circuit. The control terminals of the output transistors, which are coupled together, may be coupled to the first inputs with the driver functioning as a pulser, or else coupled to the second inputs with the driver functioning as a linear driver.

公开(公告)号：US09966944B2

公开(公告)日：2018-05-08

申请号：US15216271

申请日：2016-07-21

Applicant: STMicroelectronics S.R.L.

Inventor： Sandro Rossi ,  Valeria Bottarel

IPC: H03K3/00 ,  H03K17/687 ,  H03K19/0175

CPC classification number: H03K17/687 ,  H03K3/3565 ,  H03K17/04123 ,  H03K17/063 ,  H03K17/6872 ,  H03K19/017509 ,  H03K19/018521 ,  H03K2217/0036 ,  H03K2217/0045

Abstract: A gate driver circuit for a half bridge or full bridge output driver stage having a high side branch connected to one or more high side transistors and a low side branch connected to one or more low side transistors. A high side gate driver and a low side gate driver receive input signals at a low voltage level and output signals at a high voltage level as gate driving signals for the high side transistors and low side transistors. Each of the high side and the low side branches of the gate driver includes a set-reset latch having a signal output that is fed as a gate signal to the corresponding transistor of the half bridge or full bridge driver. A differential capacitive level shifter circuit receives the input signals at a low voltage level and outputs high voltage signals to drive the set and reset inputs of the set-reset latch.

公开(公告)号：US09772645B2

公开(公告)日：2017-09-26

申请号：US15076211

申请日：2016-03-21

Applicant: STMicroelectronics S.r.l.

Inventor： Sandro Rossi ,  Davide Ugo Ghisu ,  Fabio Quaglia ,  Antonio Davide Leone

IPC: H03K17/16 ,  G05F3/02 ,  B06B1/02 ,  H03K4/94

CPC classification number: G05F3/02 ,  B06B1/0215 ,  H03K4/94 ,  H03K17/162

Abstract: A transmission channel transmits high-voltage pulses and receives echos of the high-voltage pulses. The transmission channel includes a current generator circuit, which generates current-integrator drive currents. The control circuitry generates one or more control signals to control generation of current-integrator drive currents by the current generator circuit during transducer-driving periods. A current integrator integrates current-integrator drive currents generated by current generator circuit to generate transducer drive signals.

公开(公告)号：US20160332196A1

公开(公告)日：2016-11-17

申请号：US15220208

申请日：2016-07-26

Applicant: STMicroelectronics S.r.l.

Inventor： Davide Ugo Ghisu ,  Sandro Rossi ,  Dario Bianchi

IPC: B06B1/02 ,  H03K17/687

Abstract: A transmission channel transmits high-voltage pulses in a transmission phase and receives echoes of the high-voltage pulses in a receiving phase. The transmission channel includes a buffer with anti-memory circuitry to couple drain conduction terminals of buffer transistors of a high-side of a buffer of the transmission channel to a low-side reference voltage of a low-side of the buffer and couple drain conduction terminals of buffer transistors of the low-side of the buffer to a high-side reference voltage of the high-side of the buffer during the clamping phase.

Abstract translation: 传输通道在传输阶段传输高电压脉冲，并在接收阶段接收高电压脉冲的回波。 传输通道包括具有防存储器电路的缓冲器，用于将传输通道的缓冲器的高侧的缓冲晶体管的漏极导通端子耦合到缓冲器的低侧的低侧参考电压并耦合漏极导通 缓冲器的低侧的缓冲晶体管的端子在钳位阶段期间到缓冲器的高侧的高侧参考电压。

公开(公告)号：US11888384B2

公开(公告)日：2024-01-30

申请号：US17532833

申请日：2021-11-22

Applicant: STMicroelectronics S.r.l.

Inventor： Niccolo′ Brambilla ,  Sandro Rossi ,  Valeria Bottarel ,  Alessandro Nicolosi

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M1/0006 ,  H02M3/158

Abstract: In an embodiment, a switching converter includes: a switching stage including first and second switching devices for receiving an input voltage and for providing an output voltage; a driving stage including first and second driving devices for driving the first and second switching devices, respectively; a current sensing arrangement for sensing an output current provided by the switching stage; a voltage generation arrangement configured to generate a supply voltage for powering the driving stage, the voltage generation arrangement being configured to adjust the supply voltage according to the sensed output current; and a charge recovery stage configured to store a first electric charge being lost from the first driving device during driving of the first switching device and to release at least partially the stored first electric charge to the second driving device during driving of the second switching device.