由多路负反馈有源滤波电路组成的多频段图示均衡器

本文给出一种用反馈放大器型有源滤波器组成的参量均衡(Parametric EQ)电路,用以构成一个29段图示均衡器,并给出了实用电路、实验数据和测试结果。本电路的优点是各频段的中心频率Q值和增益等参量可以分别独立调节,互不影响。特别适用于频段数较多的专业图示均衡器,对10段以下的民用均衡器同样具有参考价值。

A Multi-band Graphic Equalizer Compesed of Multichannel Negative Feedback Active Filter Circuits

Both the parametric equalizing circuit composed of feedback amplifier-type active filters forming a 29-band graphic equalizer and the practical circuit, experimental data and test results are given. The advantage of this circuit is that the central frequency, Q-value and gain of every band can be adjusted independently, without mutual influences, especially suitable for professional graphic equalizers. Similarly it has valuable reference for the domestic equalizers with less than 10 bands.