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1. 发明授权

US06542036B2 Low current amplifier circuit with protection against static electricity 失效
标题翻译：低电流放大器电路，防止静电
公开(公告)号：US06542036B2
公开(公告)日：2003-04-01
申请号：US09769540
申请日：2001-01-25
申请人： Keiji Kusachi
发明人： Keiji Kusachi
IPC分类号： H03F122
CPC分类号： H03F3/1935 , H03F1/226 , H03F1/523
摘要： A low current amplifier circuit which stably operates at a low current and has a reduced tendency to cause static breakdown includes first and second field-effect transistors. The first field-effect transistor has a gate with a small width for passing a small current when a bias voltage is applied to the gate to compensate for variations in threshold voltage. The second field-effect transistor has a gate with a larger width than that of the first field-effect transistor and a source connected to a drain of the first field-effect transistor. The second field-effect transistor reduces a current flowing through the first field-effect transistor due to static electricity.
摘要翻译：稳定地以低电流工作并且具有降低的引起静电击穿的趋势的低电流放大器电路包括第一和第二场效应晶体管。当偏置电压施加到栅极以补偿阈值电压的变化时，第一场效应晶体管具有用于通过小电流的小宽度的栅极。第二场效应晶体管具有比第一场效应晶体管宽的栅极和连接到第一场效应晶体管的漏极的源极。第二场效应晶体管由于静电而减小流经第一场效应晶体管的电流。

2. 发明申请

US20070069798A1 Switch circuit for high-frequency-signal switching 审中-公开
标题翻译：开关电路用于高频信号切换
公开(公告)号：US20070069798A1
公开(公告)日：2007-03-29
申请号：US11527424
申请日：2006-09-27
申请人： Keiji Kusachi
发明人： Keiji Kusachi
IPC分类号： H03K17/687
CPC分类号： H03K17/693 , H03K2017/6875
摘要： A switch circuit includes first and second input/output terminals; first depletion-mode transistors serially-connected between first and second nodes; second depletion-mode transistors serially-connected between third and fourth nodes; a common terminal connected to a connection node; a bias circuit feeding a first bias voltage to gates of the first depletion-mode transistors, and feeding a second bias voltage to selected one of the third and fourth nodes; and a switch control terminal receiving a control voltage. The first node is connected to the first input/output terminal, while the third node is connected to the second input/output terminal. The second and fourth nodes are connected to the connection node. A capacitor element is connected between the connection node and selected one of the second and fourth nodes. The switch control terminal is connected to gates of the second depletion-mode transistors, and to selected one of the first and second nodes.
摘要翻译：开关电路包括第一和第二输入/输出端子; 在第一节点和第二节点之间串联连接的第一耗尽型晶体管; 串联连接在第三和第四节点之间的第二耗尽型晶体管; 连接到连接节点的公共终端; 向所述第一耗尽型晶体管的栅极馈送第一偏置电压的偏置电路，以及将第二偏置电压馈送到所述第三和第四节点中的所选择的一个; 以及接收控制电压的开关控制端子。第一节点连接到第一输入/输出端，而第三节点连接到第二输入/输出端。第二和第四节点连接到连接节点。电容器元件连接在连接节点和第二和第四节点之间的选定的一个之间。开关控制端子连接到第二耗尽型晶体管的栅极，并连接到第一和第二节点中的一个。

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