论文部分内容阅读
目前许多家族都有了电视机、录像机、游戏机甚至摄像机等家用电器。如果将录像机、游戏机、摄像机等电器的射频信号用一个电视信号发射器转发出去,供方圆30米内(家庭居室范围)的电视机接收观看或监控,就可省去电缆连接等诸多不便,而且还可多机多地招收。这个电视信号发射器就像一个小小家庭电视台。本文介绍这样一个家庭电视台,它电话极其简单,制作容易,且成本也很低。 工作原理 电视信号发射器电路如图所示。射频信号经75Ω射频电缆输入至高通滤波器HP03,将低于45Mz的频率滤除,然后射频信号经三极管3DG80等组成的前置放
Many families now have household appliances such as televisions, video recorders, game consoles and even video cameras. If the video signal of recorders, game consoles, video cameras and other electrical appliances are forwarded by a television transmitter for viewing or monitoring within a radius of 30 meters (in a family room), the inconvenience of cable connection may be eliminated and Can also recruit more machines. This TV transmitter is like a small home TV station. This article describes such a home TV station, it is extremely simple phone, easy to make, and low cost. Working principle TV signal transmitter circuit as shown. The radio frequency signal is input to the high pass filter HP03 through the 75Ω RF cable, and the frequency lower than 45Mz is filtered out, and then the radio frequency signal is pre-placed by the transistor 3DG80 and the like