Re: Low pass filter on a PIC

Randy Yates wrote:
> "Manfred" <mmornhin@[EMAIL PROTECTED]
> writes:
> 
>> Hi Randy,
>>
>>> I have the advantage of seeing the other posters' suggestions and
>>> your repsonse,
>> For some reason my follow-up ended up posted as a new thread! I don't
know
>> if I pressed the wrong button, or if it happened for some other reason.
So
>> now we have two threads with this...
>>
>>> but how about the following:
>>>
>>>  y[n] = x[n] - 0.61803 * x[n-1] + x[n-2]
>>>
>>> ? This is an FIR notch filter with a notch right at 20 Hz. 
>>> The 0.61803 term is 2*cos(0.4*pi).
>> But I don't need a notch filter! I need a low pass... Anyway, it's
>> interesting! 
> 
> Hi Manfred,
> 
> I thought what you needed was to get rid of the 20 Hz interference. Is
> this not true? If it is true, then either one will work, no? In fact,
> if this is your only goal, the 20 Hz notch should be better. 

I think he said 420 Hz jitter.

Jerry
-- 
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