公开(公告)号：US20170104481A1

公开(公告)日：2017-04-13

申请号：US15265341

申请日：2016-09-14

Applicant: Microchip Technology Inc.

Inventor： Isaac Ko ,  Ka Wai Ho ,  Wan Tim Chan

IPC: H03K17/16 ,  A61B8/00 ,  A61B8/08

CPC classification number: H03K17/161 ,  A61B8/4483 ,  A61B8/469 ,  A61B8/485 ,  A61B8/546 ,  H03K17/6874 ,  H03K17/693 ,  H03K2217/0054 ,  H04B1/48

Abstract: An improved analog switch for use in an ultrasound elastography probe is disclosed. The improved analog switch results in less heat dissipation compared to prior art analog switches.

公开(公告)号：US20200350901A1

公开(公告)日：2020-11-05

申请号：US16933983

申请日：2020-07-20

Applicant: Microchip Technology Inc

Inventor： Isaac Ko ,  KA WAI HO ,  WAN TIM CHAN ,  JIMES LEI

IPC: H03K17/06 ,  A61B8/00 ,  H03K17/693

Abstract: Described herein are multiple designs for an improved analog switch for use in transmitting high voltage signals without using high voltage power supplies for the switch. The analog switches are able to pass and block input signals in the approximate range of −100 V to +100 V. The use of translinear loops and a bootstrap configuration results in a constant on-resistance of the symmetrical switches and matches the conductance of each analog switch to the transconductance of an NMOS transistor, which can be easily stabilized with a constant gm biasing scheme. In certain embodiments, a shunt termination (T-switch) configuration is used for better off-isolation, and each of the symmetrical switches has its own translinear loop and thus flexibility of on-resistance and termination voltage.

公开(公告)号：US11245391B2

公开(公告)日：2022-02-08

申请号：US16933983

申请日：2020-07-20

Applicant: Microchip Technology Inc.

Inventor： Isaac Ko ,  Ka Wai Ho ,  Wan Tim Chan ,  Jimes Lei

IPC: H03K17/06 ,  A61B8/00 ,  H03K17/693

Abstract: Described herein are multiple designs for an improved analog switch for use in transmitting high voltage signals without using high voltage power supplies for the switch. The analog switches are able to pass and block input signals in the approximate range of −100 V to +100 V. The use of translinear loops and a bootstrap configuration results in a constant on-resistance of the symmetrical switches and matches the conductance of each analog switch to the transconductance of an NMOS transistor, which can be easily stabilized with a constant gm biasing scheme. In certain embodiments, a shunt termination (T-switch) configuration is used for better off-isolation, and each of the symmetrical switches has its own translinear loop and thus flexibility of on-resistance and termination voltage.

公开(公告)号：US20160191036A1

公开(公告)日：2016-06-30

申请号：US14919000

申请日：2015-10-21

Applicant: Microchip Technology Inc.

Inventor： Isaac Ko ,  Ka Wai Ho ,  Wan Tim Chan ,  Jimes Lei

IPC: H03K17/06 ,  A61B8/00

CPC classification number: H03K17/063 ,  A61B8/4444 ,  H03K17/693 ,  H03K2217/0009

Abstract: Described herein are multiple designs for an improved analog switch for use in transmitting high voltage signals without using high voltage power supplies for the switch. The analog switches are able to pass and block input signals in the approximate range of −100V to +100V. The use of translinear loops and a bootstrap configuration results in a constant on-resistance of the symmetrical switches and matches the conductance of each analog switch to the transconductance of an NMOS transistor, which can be easily stabilized with a constant gm biasing scheme. In certain embodiments, a shunt termination (T-switch) configuration is used for better off-isolation, and each of the symmetrical switches has its own translinear loop and thus flexibility of on-resistance and termination voltage.

Abstract translation: 这里描述了用于在不使用用于开关的高压电源的情况下传输高电压信号的改进的模拟开关的多种设计。 模拟开关能够通过和阻止输入信号在-100V至+ 100V的近似范围内。 使用跨线性回路和自举配置导致对称开关的导通电阻恒定，并将每个模拟开关的电导与NMOS晶体管的跨导相匹配，这可以通过恒定的gm偏置方案进行稳定。 在某些实施例中，分流端接（T开关）配置用于更好的非隔离，并且每个对称开关具有其自己的横向线性环路，并因此具有导通电阻和终止电压的灵活性。

公开(公告)号：US10756719B2

公开(公告)日：2020-08-25

申请号：US14919000

申请日：2015-10-21

Applicant: Microchip Technology Inc.

Inventor： Isaac Ko ,  Ka Wai Ho ,  Wan Tim Chan ,  Jimes Lei

IPC: H03K17/693 ,  H03K17/06 ,  A61B8/00

Abstract: Described herein are multiple designs for an improved analog switch for use in transmitting high voltage signals without using high voltage power supplies for the switch. The analog switches are able to pass and block input signals in the approximate range of −100V to +100V. The use of translinear loops and a bootstrap configuration results in a constant on-resistance of the symmetrical switches and matches the conductance of each analog switch to the transconductance of an NMOS transistor, which can be easily stabilized with a constant gm biasing scheme. In certain embodiments, a shunt termination (T-switch) configuration is used for better off-isolation, and each of the symmetrical switches has its own translinear loop and thus flexibility of on-resistance and termination voltage.

公开(公告)号：US10171072B2

公开(公告)日：2019-01-01

申请号：US15265341

申请日：2016-09-14

Applicant: Microchip Technology Inc.

Inventor： Isaac Ko ,  Ka Wai Ho ,  Wan Tim Chan

IPC: H03K17/687 ,  A61B8/08 ,  H03K17/16 ,  A61B8/00 ,  H03K17/693 ,  H04B1/48

Abstract: An improved analog switch for use in an ultrasound elastography probe is disclosed. The improved analog switch results in less heat dissipation compared to prior art analog switches.