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公开(公告)号：US5748101A
公开(公告)日：1998-05-05
申请号：US492945
申请日：1995-06-21
CPC分类号： G07C9/00857 , E05B47/00 , E05B65/0021 , E05F15/77 , E05Y2900/106 , G07C2009/00793
摘要： A method for actuating an access control transmitter in which a four code access transmitter is employed with the dimmer switch flashed once to produce a first signal, twice in rapid succession to produce a second signal, three times in rapid succession to produce a third signal, and four times in rapid succession to produce a fourth succession. Each separate signal is an access controlled signal to gain access to an access controlled area such as a garage. Programming of the access controlled transmitter occurs by actuating a standard transmitter nearby, when the access transmitter is in a programming mode. A programming access mechanism is provided to prevent authorized programming of the access transmitter by one not having the programming access code.
摘要翻译： 一种用于致动访问控制发射机的方法，其中四个码接入发射机与调光器开关一起闪烁以产生第一信号，两次快速相继产生第二信号，三次快速连续地产生第三信号， 并迅速连续四次进行第四次继承。 每个单独的信号是访问控制信号，以访问诸如车库的访问控制区域。 访问控制的发射机的编程通过在接入发射机处于编程模式时致动附近的标准发射机而发生。 提供了编程访问机制，以防止没有编程访问代码的访问发射机的授权编程。
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公开(公告)号：US5397927A
公开(公告)日：1995-03-14
申请号：US934924
申请日：1992-08-25
摘要： An AC power line is monitored for currents and voltages at non-fundamental frequencies (including harmonics). A controlled active filter injects compensating current into the AC power line. The injected compensating current is responsive to both the sensed non-fundamental frequency current and to the sensed non-fundamental frequency voltage residing on the power line. In one embodiment, the controlled active filter comprises a transconductance amplifier which obtains its operating power from a controlled flow of power from the AC power line being monitored.
摘要翻译： 对非基频（包括谐波）的电流和电压监测交流电源线。 受控有源滤波器将补偿电流注入到交流电源线中。 注入的补偿电流响应于感测的非基频电流和驻留在电力线上的感测的非基频电压。 在一个实施例中，受控有源滤波器包括跨导放大器，其从受监控的AC电力线路的受控的功率流中获得其工作功率。
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