公开(公告)号：US20190222185A1

公开(公告)日：2019-07-18

申请号：US15940709

申请日：2018-03-29

Applicant: Microchip Technology Incorporated

Inventor： Dong Wang ,  Jim Nolan ,  Kumen Blake ,  Milan Rai

IPC: H03F3/45 ,  H01B11/10

Abstract: An amplifier includes a differential positive input, a differential negative input, and a transistor. The transistor is communicatively coupled to the differential positive input and differential negative input at a source of the transistor. The transistor is configured to track input common mode of the differential positive input and differential negative input.

公开(公告)号：US20180088152A1

公开(公告)日：2018-03-29

申请号：US15712771

申请日：2017-09-22

Applicant: Microchip Technology Incorporated

Inventor： Dong Wang ,  Jim Nolan ,  Kumen Blake

IPC: G01R15/14 ,  G01R1/30 ,  H01L23/60 ,  H03F3/217

CPC classification number: G01R15/146 ,  G01R1/30 ,  G01R19/0023 ,  H01L23/60 ,  H03F3/2171 ,  H03F3/393 ,  H03F3/45475 ,  H03F2200/171

Abstract: A high side current sensing amplifier architecture is simplified and improved over prior art current sensing amplifier circuits by using chopping only, without requiring auto-zeroing, and by using a simpler (and faster) switched capacitor filter instead of an auto-zeroing integrator filter. Also, VIP (positive DC sense node) is merged with the VDDHV (power supply) node, such that the integrated circuit package requires only a single node (package pin) to accommodate both the VIP and VDDHV connections for the current sensing amplifier circuit, resulting in being able to use a smaller integrated circuit package. A small resistor is coupled between VIP and VDDHV to reduce the offset considerably. A low latency time high voltage level shifter is provided which is essential for precise chopping operation.

公开(公告)号：US10564186B2

公开(公告)日：2020-02-18

申请号：US15712771

申请日：2017-09-22

Applicant: Microchip Technology Incorporated

Inventor： Dong Wang ,  Jim Nolan ,  Kumen Blake

IPC: G01R15/14 ,  G01R1/30 ,  H01L23/60 ,  H03F3/217

Abstract: A high side current sensing amplifier architecture is simplified and improved over prior art current sensing amplifier circuits by using chopping only, without requiring auto-zeroing, and by using a simpler (and faster) switched capacitor filter instead of an auto-zeroing integrator filter. Also, VIP (positive DC sense node) is merged with the VDDHV (power supply) node, such that the integrated circuit package requires only a single node (package pin) to accommodate both the VIP and VDDHV connections for the current sensing amplifier circuit, resulting in being able to use a smaller integrated circuit package. A small resistor is coupled between VIP and VDDHV to reduce the offset considerably. A low latency time high voltage level shifter is provided which is essential for precise chopping operation.

公开(公告)号：US10511275B2

公开(公告)日：2019-12-17

申请号：US15940709

申请日：2018-03-29

Applicant: Microchip Technology Incorporated

Inventor： Dong Wang ,  Jim Nolan ,  Kumen Blake ,  Milan Rai

IPC: H03F3/45 ,  H01B11/10 ,  H03F1/14

Abstract: An amplifier includes a differential positive input, a differential negative input, and a transistor. The transistor is communicatively coupled to the differential positive input and differential negative input at a source of the transistor. The transistor is configured to track input common mode of the differential positive input and differential negative input.

公开(公告)号：US20240405730A1

公开(公告)日：2024-12-05

申请号：US18658240

申请日：2024-05-08

Applicant: Microchip Technology Incorporated

Inventor： Gerald Steele ,  David Gammie ,  Dong Wang

IPC: H03F3/00

Abstract: Integrated circuits and methods to provide an operative coupling comprising an input stage and an output stage between an analog input and an analog output; synchronously operate a plurality of high voltage domain switches of the input stage and a plurality of low voltage domain switches of the output stage at a frequency to galvanically isolate the input stage from the output stage across a plurality of capacitors having a plurality of input plates respectively connected to the switches of the input and output stages; supply an analog input signal to the input stage; transfer a differential voltage signal component within a range of a common mode voltage supply from the high voltage domain of the input stage to the low voltage domain of the output stage; differentially amplify the low voltage domain differential voltage signal component; and output an analog output signal.

公开(公告)号：US20240355809A1

公开(公告)日：2024-10-24

申请号：US18520616

申请日：2023-11-28

Applicant: Microchip Technology Incorporated

Inventor： Dong Wang ,  Jim Nolan ,  HongZhong Xu

IPC: H01L27/02

CPC classification number: H01L27/0266 ,  H01L27/0292

Abstract: A circuit for electrostatic discharge (ESD) protection may protect sensitive circuits in the presence of both positive and negative ESD events. A protection transistor may be coupled to a pad, and a protection clamp may be coupled to the protection transistor. The protection transistor may be in an isolation n-well, and a current limiting resistor may be coupled from the pad to the isolation n-well. In operation, the current limiting resistor may limit the current during negative ESD events.