![]() ![]() ![]() The clock used to trigger the S&H-like chain would "leak" into the signal. The BBD uses "sampled analog" and is thus subject to aliasing.ĬCDs also had another characteristic that affected the sound of a bucket brigade delay: clock noise. To change the delay time the sample clock needs to change a slower clock means a longer delay. The number of S&Hs in the CCD is fixed so the delay time through the CCD is constant for a given sample clock frequency. This is analogous to the old way water was brought to fires, the bucket brigade hence the name. So samples where passed from one S&H to the next at a rate determined by the clock. When a sample trigger occurred one S&H captured the voltage held by the previous S&H. ![]() The S&H triggers were all clocked by the same signal think of it as a sample clock. One way to think about CCDs is that they were a very long string of analog sample and holds (S&H). BBDs made use of a then new semiconductor device, the CCD (charge coupled device). If your goal is to emulate the behavior and sound of a bucket brigade delay (BBD) then some background on how BBDs worked may be helpful. ![]()
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