Overkill, yes, but a good idea.  The bucket brigade is made for audio
delay which means thousands of steps and analog.  Neither of which
is needed.  But the digital equivalent would be a shift register
and a clock.   With 1 MHz and two flip-flops you can get
a delay that would be 1-2 us.  If you want more resolution
just add more stages and up the clock, thus upping the "refresh"
rate.

>Porbably overkill for what you want to do but one device I remember reading
>about that does this sort of thing is a "bucket brigade" device. It is used
>in audio to create echos. TTYL
>

>> I was wondering if some of you guys happen to know a simple circuit to
>> create a 1us (approx.) delay for a 20kHz PWM signal coming out of a
>> PIC. I need this to create a death-time in order to avoid current
>> shoot through in an H-bridge.
>>
>> The circuit I have right now consists of a small RC to slow down the
>> ramps of the pulse, followed by a comparator with significant
>> hysteresis. The comparator hysteresis is set at 1/3 and 2/3 of vdd.
>> This circuit seems to work ok, but I was wondering if there were other
>> options too. Or is my current approach not so bad after all?
>>
>> Thanks!
>>
>> Daniel...

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