公开(公告)号：US11063587B1

公开(公告)日：2021-07-13

申请号：US17007398

申请日：2020-08-31

申请人： DB HiTek Co., Ltd.

发明人： Sang Mok Lee ,  Joon Tae Jang ,  Seung Hoo Kim

IPC分类号： G01R19/155 ,  H03K17/082 ,  H03K17/18 ,  H03K3/037 ,  H03K17/687 ,  G01R19/18

摘要： A voltage on-off detector includes an inverter between a first voltage source and a first node and having an input terminal that receives a third voltage, a first transistor having a first gate, and a first source and a first drain between the first node and a second voltage source, a second transistor having a second source connected to the second voltage source, and a second gate and a second drain connected to the first node, and an amplifier having an input terminal connected to an output terminal of the inverter and configured to output a first voltage from the first voltage or a second voltage from the second voltage source based on or in response to an output of the inverter.

公开(公告)号：US11715947B2

公开(公告)日：2023-08-01

申请号：US17555405

申请日：2021-12-18

申请人： DB HiTek Co., Ltd.

发明人： Sang Mok Lee ,  Joon Tae Jang ,  Won Suk Park ,  Li Yan Jin ,  Seung Hoo Kim

IPC分类号： H02H9/04

CPC分类号： H02H9/046

摘要： An electrostatic discharge (ESD) protection circuit includes an ESD detector connected between a pad and a first power source and configured to generate a detection signal when ESD is detected at the pad, a switch transistor including a gate controlled by the detection signal and a source and a drain connected between the pad and the memory, and a leakage current prevention circuit including a first transistor including a first gate connected to a second power source and a source and a drain connected between the pad and a first node, and a second transistor including a second gate connected to the pad and a source and a drain connected between the first node and the second power source. The first node is connected to or in electrical communication with a bulk node of the switch transistor.

公开(公告)号：US11215648B1

公开(公告)日：2022-01-04

申请号：US17007744

申请日：2020-08-31

申请人： DB HiTek Co., Ltd.

发明人： Sang Mok Lee ,  Joon Tae Jang ,  Seung Hoo Kim

IPC分类号： G01R19/15 ,  G01R19/155

摘要： A voltage on-off detector includes an inverter between a first voltage source and a third voltage source providing a third voltage and having an input terminal that receives a second voltage, a first transistor having a gate that receives the second voltage, and a first source and a first drain between the third voltage source and a first node, a second transistor having a second gate that receives the third voltage, and a second source and a second drain between a second voltage source providing the second voltage and the first node, and an amplifier configured to output a first voltage from the first voltage source or a voltage on the first node based on or in response to an output of the inverter.

公开(公告)号：US10985754B1

公开(公告)日：2021-04-20

申请号：US16884694

申请日：2020-05-27

申请人： DB HiTek Co., Ltd.

发明人： Sang Mok Lee ,  Joon Tae Jang ,  Seung Hoo Kim

IPC分类号： H03K17/687

摘要： An input/output circuit includes a logic unit configured to generate a first signal and a second signal based on data and a first control signal, a driver including a first PMOS transistor having a first gate, a first source that receives a first voltage from a first voltage source, and a first drain, and a first NMOS transistor having a second gate that receives the second signal, a second source that receives a second voltage from a second voltage source less than the first voltage, and a second drain connected to the first drain, a gate-tracking circuit configured to receive the first signal and transfer the received first signal to the first gate of the first PMOS transistor based on a second control signal, and an input/output terminal connected to the first drain and the second drain.