Continuous signals like modulation, or stepped, as in VCO CVs? If the latter, the device you want is an analog shift register. Basically, it's a set of seriesed sample and holds: the first register locks in a CV value on a timing pulse, then on the second pulse that CV gets passed to the second register and a new CV gets sampled into the first, and so on. And since this uses basic clock timing pulses, whatever time base you want to use to obtain your step times would allow for a lot of flexibility for delaying the pass-on process. This won't work for anything that's a continuous voltage curve, however.