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使用单芯传输技术已成为船用电测海洋仪器的一个重要发展方向。单芯传输技术中目前用得较多的是频分制。这需要解决调频式传感器和性能较优异的滤波器这两大问题。本文提出一种没计和制作都很简便的RC有源滤波器的制作原理和方法。这种滤波器在这种场合下运用是十分合适的。本文提出用已知性能的单元电路串接起来做成所需的RC的源滤波器。文中收集的几种放大倍数近似为一的单元电路,分析了元件值及放大倍数的变化对单元电路响应曲线的影响。作者提出并分析了一种新的,在放大倍数小于一时调整性能较好的三阶电路,将它与其它单元电路配合制作滤波器时,具有较优异的性能。文中提出的在制作滤波器时的单元电路串接方案,没计简便,制作方便,形象直观,容易掌握。
The use of single-core transmission technology has become an important direction of development for marine electrical measurement and marine instruments. Single-core transmission technology is currently used more frequency division. This needs to solve two major problems that the frequency modulation type sensor and the better performance filter. This paper presents a production method and method of RC active filter which is very simple and easy to measure. This filter is used in this case is very appropriate. In this paper, it is proposed to connect the unit circuits of known performance in cascade to form the required RC source filter. The paper collects several kinds of unit circuits with approximate one magnification, and analyzes the influence of component value and magnification on the unit circuit response curve. The author proposes and analyzes a new third-order circuit with better performance when the magnification is less than one, and has excellent performance when it is combined with other unit circuits to make a filter. The proposed scheme of unit circuit connection when making filter is not easy, easy to manufacture, visual and easy to grasp.