[sdiy] Synthex Oscillator

[Tom Wiltshire]

On 9 Jul 2017, at 05:07, rsdio at audiobanshee.com wrote:

> In my mind, a boardful of LS series logic begs to be put into an FPGA, but only if the cost is right. So far, every design I've done has turned out to be cheaper as discrete LS logic, simply because those parts are so damn cheap and prevalent. The equivalent FPGA has always been more expensive. There's also the inherent advantage that LS logic does what it's supposed to do as soon as it's soldered on the board, whereas programmable logic has to be programmed before it will do what you want.
> 
> I mention this because you should consider making your design first, and after you're settled on the logic you could take a look at how it would affect size and price to squeeze all or part of the logic into a CPLD, FPGA, or other device.

I totally agree about this. Whilst reading the Synthex schematics your brain starts screaming "FPGA! CPLD!". Unfortunately I have no experience with such things, but there's always a first time. The idea of getting the Synthex oscillators down to a chip or two is certainly appealing. I assume that if you'd programmed a pair of oscillators (with all the cross-mod and whathaveyou) copying that seven more times would be easy enough? Perhaps what you'd save on the PCB cost would compensate a bit for the more expensive chip.

Thanks,
Tom

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Synth & Stompbox DIY
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