analogue delay line

There are numerous applications requiring the use of an audio delay line, for example phasing and vibrato units, echo and reverberation units, and sophisticated loudspeakers with active time-delay compensation. One of the simplest ways to achieve this electronically is to use an analogue (bucket brigade) shift register. There are various types on the market and a particularly interesting one is the Reticon SAD 512, which has 512 stages and a built-in clock buffer. The clock buffer enables it to be driven from a simple, single-phase clock circuit such as a CMOS multi-vibrator.