BBD-MN3010 and MN3011- is a MN3101 clock necessary?

[Dana Scott]

To make a quick and dirty non-overlap circuit  try  a resistor and
diode on both outputs of the 4013. The diode and resistor would be in
parallel, with the cathode towards the 4013. The resistor value would
depend on the input capacitance BBD.  I'd start at about 3.3K.
-Dana


>I don't know that the MN3101 has any dead-zone between pulses... and
the
>4013 is
>certainly closer that the "cascaded inverter" approach that is also
used.
>The 4013 has been used in many clock circuits... although it is
probably not
>optimum. I'd like more drive, thank you.
>
>The non-overlapping clock (with dead zone...) has been proposed
before
>(maybe it was you, Tony... I don't remember.) I think it is worth
>investigating... but I don't plan on it anytime soon (like in the
next 100
>years....). To be honest I don't do BBD's but IF I did..
>I d try this idea.
>
>H^) harry
>
>Tony Allgood wrote:
>
>> >...the old standby is to make the clock run a 2X the frequency you
>> need, and then
>> use a 4013 D flip-flop as a divide by 2 circuit. The Q and notQ
outputs
>> are non-overlapping.
>>
>> Although this may seem true, I do not think they are non
overlapping
>> when you drive the BBD chip. Capacitance in the BBD's clock inputs
will
>> produce a certain degree of overlap. I think you really need some
dead
>> time between the two trains. I have a chorus unit made from two
TDA1022s
>> and I used a 4013 to derive my clocks. I will be redoing this board
at
>> some time to see if the amount of dead time can have a significant
>> effect on the amount of noise. Currently, the unit is not very
useful
>> since it is too noisy. Its not companded either, which doesn't help
>> matters.
>>
>> Regards,
>>
>> Tony Allgood  Penrith, Cumbria, UK
>>
>> Modular synth circuits, TB303 clone and Filter Rack
>>
>> http://www.techrepairs.freeserve.co.uk/projects.htm
>