This midrange filter for sound systems was found in the May 1988 issue of Radio Electronics magazine. The circuit is based on a dual amplifier that must be powered by a symmetrical source.
In the figure we have an application for NLAS5113, a new device from on Semiconductor...
This circuit, which draws numbers from 00 to 99, was found in an Italian magazine from 1974, but...
The filter shown in the figure, suggested by Motorola, operates at a cut-off frequency of 1 kHz,...