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Need schematic for frequency divider
Need schematic for frequency divider
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Old 13th February 2020, 07:55 PM   #1
alapri is offline alapri
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Default Need schematic for frequency divider

Hello everyone



I'm novice in the audio modding, but I have soldering experience.
And I want to make a audio reclocker for my Raspberry Pi 4 model B.
For this project I have two precession quartz oscillators (45..M/49..M) covering both audio frequencies.
Mainly problem is low jitter frequency divider.
Easy way is using divider by FPGA, but this not better solution, not my way.
I want to make better divider, that based on the logical microchips.
Dear community guys, how you do about my idea and can you do help me choose better divider schematic?
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Old 14th February 2020, 01:07 AM   #2
Terry Demol is offline Terry Demol  Australia
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Us a Flip flop - Here you go:

https://www.electronics-tutorials.ws...r/count_1.html

cheers

TCD
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Old 14th February 2020, 07:26 PM   #3
Mark Tillotson is offline Mark Tillotson
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For 49MHz your options are limited to only the fastest logic families, or specialized clock-divider chips. Attention to trace impedance and preventing signal reflections and ringing will give best results.


75LVC163 4 bit counter will give you divide by 2, 4, 8 or 16, clocks upto 120MHz or so, 3.3V logic note.
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Old 15th February 2020, 12:26 AM   #4
alapri is offline alapri
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Thank you very much guys!


Speed of clock-divider chips is very important.
In this case I will get fixed frequency at out.
How to switch of sample rates (44.1, 88.2 ...)?
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Old 15th February 2020, 01:16 AM   #5
Terry Demol is offline Terry Demol  Australia
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WRT speed, this will also work.

http://www.potatosemi.com/potatosemi...t/PO74G74A.pdf

cheers

TCD
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Old 15th February 2020, 01:49 AM   #6
nigelwright7557 is offline nigelwright7557  United Kingdom
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Perhaps a phase locked loop ?

Maybe over kill, but put clock into a PIC32MX and get clock out after the phase locked loop multiplier/divider.
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Old 15th February 2020, 06:31 PM   #7
alapri is offline alapri
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Terry Demol
Potatosemi produce very speed a logic IC.
I want to test them too!
I'm sorry, what is "WRT speed"?

nigelwright7557
I don't understand how it should work, you suggest using PIC32MX as a frequency divider?
But this will not give a jitter gain?
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