Resonanzmesser (digitales Dipmeter mit 4x BF494)

This circuit is intended as a practical sup· plement to earlier articles on the subject of constant voltage filters (see Elektor 25/26 `active loudspeaker-crossover filters`; and Ejektor, Elektor 26). The design is based on a circuit published in the article `Active and passive filters as loudspeaker crossover networks` JABS, June 1971.