Tiens une lecture interessante en rapport avec le fonctionneemnt du DF2:
Citation:
4046-based design ideas file:
Marston's4046circuits.PDF
000029
5/27/101 3:24 am
This is an interesting set of pages from Ray Marston's 1987 book "CMOS Circuits Manual", covering 4046-based oscillators and other circuit fragments. The 4046 phase-locked loop is able to track the frequency of an input signal and generate a signal. I've seen them used in crude frequency to voltage convertors, and the 4046 also forms an essential part of the BOSS DF-2 Distortion Feedbacker. For the uninitiated, the DF-2 tracks the note being played, and produces a parallel note that sounds a bit like a feedback-overtone if you hold the note a bit.