On 3 Feb, 2012, at 14:15 , Orin Eman wrote:
On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net wrote:
It's possible to use Bresenham with two integers 10,000,000 and 32,768
but I
found no way to perform all the 24-bit calculations on an 8-bit PIC quick
enough. Removing
On Fri, Feb 3, 2012 at 1:08 AM, Dennis Ferguson dennis.c.fergu...@gmail.com
wrote:
On 3 Feb, 2012, at 14:15 , Orin Eman wrote:
On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net
wrote:
It's possible to use Bresenham with two integers 10,000,000 and 32,768
but I
t...@leapsecond.com said:
I'm curious how a 10 MHz-driven high-end DDS would generate 32 kHz with the
lowest possible jitter?
What do you mean by high-end DDS? A chip from Analog Devices or one from
Xilinx? :)
If you use a classic DDS chip with a binary adder and ROM, it will have low
Hi Roberto:
By changing the timer count dynamically it's possible to lower the jitter to
one timer count. See:
http://www.prc68.com/I/PClock.shtml#BA
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html
Roberto Barrios wrote:
Hi Tom,
I'm
Hi Roberto:
By changing the timer count dynamically it's possible to lower the jitter to
one timer count. See:
http://www.prc68.com/I/PClock.shtml#BA
Have Fun,
Brooke Clarke
Hi Brooke,
You're a fellow PIC guy; let me explain.
Correct, that method works with a modest interrupt rate to
On Thu, Feb 2, 2012 at 12:21 PM, Tom Van Baak t...@leapsecond.com wrote:
I'm curious how a 10 MHz-driven high-end DDS would generate
32 kHz with the lowest possible jitter?
I wonder if your 32K diver could be improved if it used interpolation.
In other words use an analog output. So at
Now I'm thinking that starting with a first run of 8 cycles at 500nS + 2
cycles at 400nS to be repeated for 10 times and then inserting 2 cycles of
400nS, a first approximation of my 2.048MHz can be done. Maybe with a
deltaF/F of 10 at -4 for tau 1 second but it can be done. In the very long
run
Hi Tom:
I like the leap year idea. Does this fit into one of the 8-pin PICs?
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/Brooke4Congress.html
Tom Van Baak wrote:
Hi Roberto:
By changing the timer count dynamically it's possible to lower the jitter to
It's possible to use Bresenham with two integers 10,000,000 and 32,768 but I
found no way to perform all the 24-bit calculations on an 8-bit PIC quick
enough. Removing the GCD often helps but in this case the accumulator
remains 3-bytes wide.
To generate 32 kHz you have to toggle a pin and
On Thu, Feb 2, 2012 at 12:21, Tom Van Baak t...@leapsecond.com wrote:
It's possible to use Bresenham with two integers 10,000,000 and
32,768 but I found no way to perform all the 24-bit calculations
on an 8-bit PIC quick enough. Removing the GCD often helps
but in this case the accumulator
On Thu, Feb 2, 2012 at 7:16 PM, Hal Murray hmur...@megapathdsl.net wrote:
It's possible to use Bresenham with two integers 10,000,000 and 32,768
but I
found no way to perform all the 24-bit calculations on an 8-bit PIC quick
enough. Removing the GCD often helps but in this case the
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