Generate 70MHz signal with 5 voltage levels

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Generate 70MHz signal with 5 voltage levels

Post by jeskiddin » Tue Jul 04, 2017 9:09 pm

I'm working on my own communication protocol for a research project. As a start I want to emulate the Gigabit Ethernet protocol which has 2 properties:
-- Uses at least 5 voltage levels to encode information
-- Operates on a wavelength of ~70MHz+

I have a few questions:
1) What are good FPGAs or programmable devices that operates and can generate and modulate 70MHz signals?
2) Since GPIO pins only produce two voltage levels (0V and high), would a voltage translator be a good option to produce 5 different voltage levels? If not what are some techniques I can use to achieve this?

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Joined: Sat Dec 19, 2009 12:16 pm

Re: Generate 70MHz signal with 5 voltage levels

Post by markaren1 » Tue Sep 05, 2017 11:48 am

Have a look at the terASIC DE0-nano; complete, and low cost FPGA dev board.

Multi-level high speed stuff; might want to use an 8 bit DAC running at 200MSPS to synthesize a 70MHz signal, you will then have plenty of flexibility for design changes.


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