公开(公告)号：US20190267791A1

公开(公告)日：2019-08-29

申请号：US16226693

申请日：2018-12-20

Applicant: Symptote Technologies, LLC

Inventor： Mark D. Creech

IPC: H02H3/093 ,  H02H1/04 ,  H02H3/087

Abstract: Two-transistor devices protect electrical circuits from sustained overcurrent conditions. Some cases provide normally-on depletion mode transistors biased into enhancement mode for lower impedance during normal current conditions, and then the transistors are biased into blocking depletion mode during sustained overcurrent conditions to block the current to the circuit. Optionally, the devices have only two terminals and require no auxiliary power to operate. Other cases provide protective circuitry for the transistors' gates, timing circuitry designed to ignore brief nuisance spikes, and/or timing circuitry to delay resetting the device until the current has returned to an acceptable level.

公开(公告)号：US11355916B2

公开(公告)日：2022-06-07

申请号：US16943512

申请日：2020-07-30

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H03K17/082 ,  H02H3/087 ,  H03K17/042 ,  H03K17/0412 ,  H01L27/02 ,  H02H9/02 ,  H02M1/32 ,  H03K17/687

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US11031769B2

公开(公告)日：2021-06-08

申请号：US16226693

申请日：2018-12-20

Applicant: Symptote Technologies, LLC

Inventor： Mark D. Creech

IPC: H02H3/093 ,  H02H1/04 ,  H02H3/087

Abstract: Two-transistor devices protect electrical circuits from sustained overcurrent conditions. Some cases provide normally-on depletion mode transistors biased into enhancement mode for lower impedance during normal current conditions, and then the transistors are biased into blocking depletion mode during sustained overcurrent conditions to block the current to the circuit. Optionally, the devices have only two terminals and require no auxiliary power to operate. Other cases provide protective circuitry for the transistors' gates, timing circuitry designed to ignore brief nuisance spikes, and/or timing circuitry to delay resetting the device until the current has returned to an acceptable level.

公开(公告)号：US20230352927A1

公开(公告)日：2023-11-02

申请号：US18102443

申请日：2023-01-27

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H03K17/082 ,  H02H3/087 ,  H03K17/042 ,  H03K17/0412 ,  H01L27/02 ,  H02H9/02 ,  H02M1/32

CPC classification number: H02H3/085 ,  H03K17/0822 ,  H02H3/087 ,  H03K17/04206 ,  H03K17/04123 ,  H01L27/0266 ,  H01L27/0288 ,  H02H3/08 ,  H02H9/025 ,  H02M1/32 ,  H03K2217/0081 ,  H03K2017/6875

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US20220302695A1

公开(公告)日：2022-09-22

申请号：US17830402

申请日：2022-06-02

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H03K17/082 ,  H02H3/087 ,  H03K17/042 ,  H03K17/0412 ,  H01L27/02 ,  H02H9/02 ,  H02M1/32

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US11611206B2

公开(公告)日：2023-03-21

申请号：US17830402

申请日：2022-06-02

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H02H9/02 ,  H03K17/082 ,  H02H3/087 ,  H03K17/042 ,  H03K17/0412 ,  H01L27/02 ,  H02M1/32 ,  H03K17/687

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US10770883B2

公开(公告)日：2020-09-08

申请号：US15755744

申请日：2016-09-21

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H03K17/082 ,  H02H3/087 ,  H03K17/042 ,  H03K17/0412 ,  H01L27/02 ,  H02H9/02 ,  H02M1/32 ,  H03K17/687

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US11962141B2

公开(公告)日：2024-04-16

申请号：US18102443

申请日：2023-01-27

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H01L27/02 ,  H02H3/087 ,  H02H9/02 ,  H02M1/32 ,  H03K17/0412 ,  H03K17/042 ,  H03K17/082 ,  H03K17/687

CPC classification number: H02H3/085 ,  H01L27/0266 ,  H01L27/0288 ,  H02H3/08 ,  H02H3/087 ,  H02H9/025 ,  H02M1/32 ,  H03K17/04123 ,  H03K17/04206 ,  H03K17/0822 ,  H03K2017/6875 ,  H03K2217/0027 ,  H03K2217/0081

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.

公开(公告)号：US10205313B2

公开(公告)日：2019-02-12

申请号：US15216758

申请日：2016-07-22

Applicant: Symptote Technologies, LLC

Inventor： Mark D. Creech

IPC: H02H3/087 ,  H02H3/093 ,  H02H1/04

Abstract: Two-transistor devices protect electrical circuits from sustained overcurrent conditions. Some cases provide normally-on depletion mode transistors biased into enhancement mode for lower impedance during normal current conditions, and then the transistors are biased into blocking depletion mode during sustained overcurrent conditions to block the current to the circuit. Optionally, the devices have only two terminals and require no auxiliary power to operate. Other cases provide protective circuitry for the transistors' gates, timing circuitry designed to ignore brief nuisance spikes, and/or timing circuitry to delay resetting the device until the current has returned to an acceptable level.

公开(公告)号：US20180248353A1

公开(公告)日：2018-08-30

申请号：US15755744

申请日：2016-09-21

Applicant: Symptote Technologies LLC

Inventor： Mark D. Creech

IPC: H02H3/08 ,  H02H9/02 ,  H01L27/02 ,  H03K17/082 ,  H02M1/32

Abstract: Devices having one primary transistor, or a plurality of primary transistors in parallel, protect electrical circuits from overcurrent conditions. Optionally, the devices have only two terminals and require no auxiliary power to operate. In those devices, the voltage drop across the device provides the electrical energy to power the device. A third or fourth terminal can appear in further devices, allowing additional overcurrent and overvoltage monitoring opportunities. Autocatalytic voltage conversion allows certain devices to rapidly limit or block nascent overcurrents.