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11. 发明授权

US07728649B1 Leakage current cancellation for integrated analog switch 有权
标题翻译：集成模拟开关的泄漏电流消除
公开(公告)号：US07728649B1
公开(公告)日：2010-06-01
申请号：US12261087
申请日：2008-10-30
申请人： Robert W. Webb , Gregg D. Croft
发明人： Robert W. Webb , Gregg D. Croft
IPC分类号： H03K3/01
CPC分类号： H03K17/165 , H03K2217/0036
摘要： An integrated analog switch including first and second semiconductor devices and a current mirror. The first device is a switching device having first and second current terminals coupled between first and second switch terminals. When turned off, the body of the first device is pulled to a bias voltage, and a first leakage current flows between its body and the first switch terminal. The second device is a reduced-size replica of the first device having one current terminal coupled to the first switch terminal and having its body pulled to about the bias voltage when turned off. The second device provides a second leakage current which is proportional to the leakage current of the first device. The current mirror circuit mirrors and amplifies the second leakage current to provide a cancellation current which is applied to the first switch terminal to cancel leakage current.
摘要翻译：包括第一和第二半导体器件和电流镜的集成模拟开关。第一装置是具有耦合在第一和第二开关端子之间的第一和第二电流端子的开关装置。当关闭时，第一装置的主体被拉到偏置电压，并且第一泄漏电流在其主体和第一开关端子之间流动。第二装置是第一装置的缩小尺寸的复本，其具有耦合到第一开关端子的一个电流端子，并且在关闭时将其主体拉至约偏置电压。第二装置提供与第一装置的泄漏电流成比例的第二泄漏电流。电流镜电路镜像并放大第二泄漏电流，以提供施加到第一开关端子以消除泄漏电流的消除电流。

12. 发明授权

US5670799A High voltage protection using SCRs 失效
标题翻译：使用SCR的高压保护
公开(公告)号：US5670799A
公开(公告)日：1997-09-23
申请号：US253287
申请日：1994-08-26
申请人： Gregg D. Croft
发明人： Gregg D. Croft
IPC分类号： H01L27/02 , H01L29/74 , H01L31/111
CPC分类号： H01L27/0259 , H01L27/0251 , H01L2224/49171 , H01L2924/01014 , H01L2924/12032 , H01L2924/13034 , H01L2924/1305 , H01L2924/13091 , H01L2924/19041 , H01L2924/30107 , H01L2924/3011
摘要： A high voltage protection circuit includes breakdown networks for providing a discharge path between a pair of terminals of a circuit to be protected. Each network conducts current between a supply terminal and another terminal at a low threshold voltage value when power is removed from the supply terminal. The network increases the threshold value when power is applied to the supply terminal to prevent conduction through the breakdown network during normal operation of the circuit to be protected. In one implementation, the protection circuit includes anti-latching circuitry connected to the breakdown network for preventing the breakdown network from latching on after or during the time power is applied to the supply terminals. To minimize the degradation of DC operating characteristics, the leakage currents, due to the protection circuit, between the first terminal and the positive supply terminal, and between the first terminal and the negative supply terminal cancel each other. The protection circuit may be incorporated on the same substrate as the circuit to be protected or it may be incorporated on a separate substrate sharing a common housing with the circuit to be protected. Alternately, the protection circuit say be in its own housing with its external leads connected to the leads of a first housing including the circuit to be protected.
摘要翻译：高压保护电路包括用于在要保护的电路的一对端子之间提供放电路径的击穿网络。当电源从供电端子移除时，每个网络以低阈值电压值在电源端子和另一个端子之间传导电流。当电源施加到供电端子时，网络增加阈值，以防止在要保护的电路的正常工作期间通过击穿网络导通。在一个实施方式中，保护电路包括连接到击穿网络的防闩锁电路，用于防止击穿网络在向电源端子施加电力之后或期间锁定。为了最小化直流工作特性的劣化，由于第一端子和正电源端子之间以及第一端子和负电源端子之间的保护电路引起的漏电流彼此抵消。保护电路可以被结合在与要保护的电路相同的衬底上，或者它可以被结合在与要保护的电路共享共同壳体的单独衬底上。或者，保护电路说在自己的壳体中，其外部引线连接到包括要保护的电路的第一壳体的引线。

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