-
公开(公告)号：US5864582A
公开(公告)日：1999-01-26
申请号：US806264
申请日：1997-02-24
IPC分类号： H03K7/08
CPC分类号： H03K7/08
摘要： A method of modulating the pulse width of a pulse width signal in response to an analog signal. The steps include changing the analog signal to a digital signal, changing the digital signal to a number of counts, changing the number of counts to a time delay, and then using the logic circuit to combine the time delay with a pulse with modulated input to change the pulse width of an output signal.
摘要翻译： 响应于模拟信号调制脉冲宽度信号的脉冲宽度的方法。 这些步骤包括将模拟信号改变为数字信号，将数字信号改变为多个计数，将计数数量改变为时间延迟，然后使用逻辑电路将时间延迟与具有调制输入的脉冲组合 改变输出信号的脉冲宽度。
-
公开(公告)号：US4917213A
公开(公告)日：1990-04-17
申请号：US364871
申请日：1989-06-12
CPC分类号： B66F11/046
摘要： An electrohydraulic control system that includes a plurality of electrohydraulic devices coupled to a remote master controller by a high-speed serial communication bus. The bus has a serial differential transmission line, and a control line for indicating impending transmission of data from one controller and conditioning the other controllers to receive information. Sections of the communication bus are electrically isolated from each other, while maintaining data and control line signal integrity therebetween, by electro-optical interface modules that include transmitters and receivers interconnected by lengths of fiber optic line, and interface drivers having signal ports respectively interconnecting the fiber optic transmitters and receivers to associated sections of the communication bus. An oscillator in the interface module at the isolated end of the bus cooperates with a filter in the module at the bus end of the optic fibers to condition the interface driver at the bus end to receive or transmit data from or to the bus as a function of the transmit/receive control output from the isolated controller. Interconnection is thus accomplished employing only a pair of fiber optic transmitters and receivers, and a pair of fiber optic lines, greatly reducing the cost that would otherwise be incurred if the transmit/receive control line were handled by separate fiber optics.
-
搜索结果
2 条记录 (耗时 0.012 秒)
