clock multiplier

[Paul Perry]

At 03:56 PM 15/04/98 +0200, you wrote:

>At 12:57 PM 15/04/98 +0200, Martin Czech  wrote:
>>Another idea for multiplying frequency:
>>
>>A sawtooth input wave is converted with a thermometer code ADC
>>in order to get equidistant time markers. 
>>
>>This sounds horribly complicated and expensive, but it is not.  It
>>takes just a handfull of LF311 comparators
>
>....this is good.... but I think possibly what people were wanting is
>to multiply the clock rate, which will be changing with tempo.. so you
>will have to derive a triangle (or more likely sawtooth) with fixed 
>height from the input clock, which is not easy!
>which is why I suggest a variable comparator comparison level which 
>tracks the triangle peak..
>
>paul perry melbourne australia