可全部集成化的R有源滤波器数种新电路的设计

• 作 者: 孙致孝
• 出 处: 电子技术应用
• 发表日期: 1980年05期
• 关键词: 有源滤波器 开环增益 运放 滤波器 电感线圈 电容 上限 带阻 单极点 带通

一、序言众所周知,滤波器的集成化是困难的。为使滤波器集成化,曾作过大量研究工作。为了消除电感线圈,曾产生了RG有源滤波器。但其中仍含有不易集成化的电容,而且频率越低,电容越大,体积也越大。在频率上限,因受运放开环增益大大下降的影响,又使RC有源滤波器的运用受到了限制。

First, the preamble As we all know, the integration of the filter is difficult. To make the filter integrated, a great deal of research work has been done. In order to eliminate the inductor, RG active filters have been produced. But which still contain difficult to integrate the capacitor, and the lower the frequency, the greater the capacitance, the greater the volume. The upper limit of the frequency, due to greatly affected by the operational amplifier open-loop gain, but also the use of RC active filter has been limited.