公开(公告)号：US10243550B2

公开(公告)日：2019-03-26

申请号：US15625261

申请日：2017-06-16

Applicant: STMicroelectronics, Inc.

Inventor： Pavan Nallamothu

IPC: H03K5/153 ,  H03K17/082 ,  H03K5/24 ,  G05F1/56

Abstract: An electronic device includes a power switch having a control terminal coupled to a first node, a first conduction terminal coupled to a second node, and a second conduction terminal coupled to a third node. A monitoring circuit has a first input coupled to the first node and a second input coupled to the second node, the monitoring circuit to generate a monitor signal indicating gate oxide stress on the power switch as a function of first and second voltages received at the first and second inputs thereof. A protection circuit actuates to protect the power switch from the gate oxide stress when the monitor signal indicates the gate oxide stress on the power switch. The monitoring signal is generated based upon a comparison of currents generated based upon the voltages at the first and second node, as well as a current generated based upon a programmable reference voltage.

公开(公告)号：US20180131341A1

公开(公告)日：2018-05-10

申请号：US15346064

申请日：2016-11-08

Applicant: STMicroelectronics, Inc.

Inventor： Pavan Nallamothu

IPC: H03G3/00 ,  H03K5/02 ,  H03K17/687

CPC classification number: H03G3/001 ,  H03K5/02 ,  H03K17/6872

Abstract: A low voltage to high voltage (LV2HV) conversion circuit has an input configured to receive an input signal (at a relatively low voltage) and an output configured to generate an output signal (at a relatively high voltage). The LV2HV conversion circuit includes a voltage to current conversion circuit referenced to the relatively low voltage and configured to convert a voltage of the input signal to a first current, wherein a magnitude of the first current is dependent on said voltage of the input signal and a gain setting value. A current mirroring circuit mirrors the first current and outputs a second current. A current to voltage conversion circuit converts the second current to a voltage of the output signal. The current mirroring circuit and current to voltage conversion circuit are referenced to the relatively high voltage.

公开(公告)号：US20180239163A1

公开(公告)日：2018-08-23

申请号：US15958808

申请日：2018-04-20

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Chih-Hung Tai ,  James L. Worley ,  Pavan Nallamothu

IPC: G02B27/64 ,  H04N5/225 ,  G03B5/00 ,  H02K41/035 ,  H02P7/025 ,  H04N5/232

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US20180138898A1

公开(公告)日：2018-05-17

申请号：US15351542

申请日：2016-11-15

Applicant: STMicroelectronics, Inc.

Inventor： Pavan Nallamothu

IPC: H03K3/012 ,  H03K17/687 ,  G05F1/575

CPC classification number: H03K3/012 ,  G05F1/575 ,  H03K17/687

Abstract: A voltage generator circuit uses a feedback loop to regulate an output voltage at an output node. A pair of opposite conductivity source-follower transistors are coupled to the output node. A first one of the source-follower transistors operates to provide a fast current transient for charging a capacitive load that is switchably connected to the output node. A second one of the source-follower transistor operate under feedback control to regulate the voltage level at the output node.

公开(公告)号：US09964777B2

公开(公告)日：2018-05-08

申请号：US14976937

申请日：2015-12-21

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Chih-Hung Tai ,  James L. Worley ,  Pavan Nallamothu

IPC: G02B27/64 ,  H02K41/035 ,  H02P7/025

CPC classification number: G02B27/646 ,  H02K41/0356 ,  H02P7/025

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US20200089021A1

公开(公告)日：2020-03-19

申请号：US16694749

申请日：2019-11-25

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Pavan Nallamothu ,  Chih-Hung TAI ,  James L. WORLEY

IPC: G02B27/64 ,  H02P7/025 ,  H02K41/035

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US10527867B2

公开(公告)日：2020-01-07

申请号：US15958808

申请日：2018-04-20

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Chih-Hung Tai ,  James L. Worley ,  Pavan Nallamothu

IPC: G02B27/64 ,  G03B5/00 ,  H02K41/035 ,  H04N5/225 ,  H04N5/232 ,  H02P7/025

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US10075139B2

公开(公告)日：2018-09-11

申请号：US15346064

申请日：2016-11-08

Applicant: STMicroelectronics, Inc.

Inventor： Pavan Nallamothu

IPC: H03K3/00 ,  H03G3/00 ,  H03K5/02 ,  H03K17/687

CPC classification number: H03G3/001 ,  H03K5/02 ,  H03K17/6872

Abstract: A low voltage to high voltage (LV2HV) conversion circuit has an input configured to receive an input signal (at a relatively low voltage) and an output configured to generate an output signal (at a relatively high voltage). The LV2HV conversion circuit includes a voltage to current conversion circuit referenced to the relatively low voltage and configured to convert a voltage of the input signal to a first current, wherein a magnitude of the first current is dependent on said voltage of the input signal and a gain setting value. A current mirroring circuit mirrors the first current and outputs a second current. A current to voltage conversion circuit converts the second current to a voltage of the output signal. The current mirroring circuit and current to voltage conversion circuit are referenced to the relatively high voltage.

公开(公告)号：US20170176764A1

公开(公告)日：2017-06-22

申请号：US14976937

申请日：2015-12-21

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Chih-Hung Tai ,  James J. Worley ,  Pavan Nallamothu

IPC: G02B27/64 ,  H02K41/035

CPC classification number: G02B27/646 ,  H02K41/0356 ,  H02P7/025

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.

公开(公告)号：US10649229B2

公开(公告)日：2020-05-12

申请号：US16697028

申请日：2019-11-26

Applicant: STMicroelectronics, Inc.

Inventor： Mark A. Lysinger ,  Chih-Hung Tai ,  James L. Worley ,  Pavan Nallamothu

IPC: G02B27/64 ,  H02P7/025 ,  H04N5/232 ,  G03B5/00 ,  H04N5/225 ,  H02K41/035

Abstract: Various embodiments provide an optical image stabilization circuit including a drive circuit having a power waveform generator and a power waveform conversion circuit. The power waveform generator generates a power waveform. The power waveform conversion circuit converts the power waveform to a power drive signal. An actuator is then driven by the power drive signal to move a lens accordingly and compensate for any movements and vibrations of a housing of the lens.