公开(公告)号：US20150171861A1

公开(公告)日：2015-06-18

申请号：US14109249

申请日：2013-12-17

Applicant: David AHERNE

Inventor： David AHERNE

IPC: H03K17/687

CPC classification number: H03K17/6872 ,  H03K2217/0018

Abstract: An analog switch may be maintained reliably in an off state. The switch comprises: a P-type first transistor having a source, a drain and a gate, a N-type second transistor having a source, a drain and a gate, and a switch control circuit to drive the gates of the first and second transistors. The drain of the first transistor and the source of the second transistor are connected at a first node, and the source of the first transistor and the drain of the second transistor are connected at a second node. When the voltage at the first or second nodes falls outside of a supply voltage range of the switch control circuit, the switch control circuit is operable, in response to a signal to make the switch high impedance, by adjusting the gate voltages of the first transistor and the second transistor.

Abstract translation: 可以将模拟开关可靠地维持在关闭状态。 开关包括：具有源极，漏极和栅极的P型第一晶体管，具有源极，漏极和栅极的N型第二晶体管，以及用于驱动第一和第二栅极的栅极的开关控制电路 晶体管。 第一晶体管的漏极和第二晶体管的源极连接在第一节点处，并且第一晶体管的源极和第二晶体管的漏极连接在第二节点处。 当第一或第二节点处的电压落在开关控制电路的电源电压范围之外时，开关控制电路可响应于使开关高阻抗的信号通过调节第一晶体管的栅极电压而工作 和第二晶体管。

公开(公告)号：US20140312935A1

公开(公告)日：2014-10-23

申请号：US14245125

申请日：2014-04-04

Applicant: David AHERNE

Inventor： David AHERNE

IPC: H03K17/081

CPC classification number: H03K17/08104 ,  H03K17/002 ,  H03K17/693

Abstract: A circuit and a system that uses the circuit for connecting a plurality of input channels to a receiving device. The circuit includes a plurality of DMOS switches, each of which connects a respective one of the input channels to the receiving device in response to a respective control signal. The control signals are referenced to a ground signal. Each input channel includes a common mode voltage that is non-referenced to the ground signal. The circuit also includes a switch driver that generates the control signals such that the input channels are activated one at a time.

Abstract translation: 一种电路和系统，其使用该电路将多个输入通道连接到接收装置。 电路包括多个DMOS开关，每个DMOS开关响应于相应的控制信号将各个输入通道连接到接收装置。 控制信号参考地面信号。 每个输入通道包括非参考地面信号的共模电压。 电路还包括产生控制信号的开关驱动器，使得输入通道一次一个地被激活。