Analog

Introduction Let me take a detour from the HDL and digital things and go back for a while into analog domain. For this whole system I’m building to be any useful, the signal from the guitar has to have enough amplitude to: Dominate the noise of the processing chain Use as much as possible the XADC dynamic range. In any case, I need something simple while also thinking I wouldn’t be able to respect myself if I do it in a circuit mounted into a breadboard. So, I took also the chance to learn the skill of PCB production in a long afternoon. ...

Introduction It took me a while to come with worthy content, but here I am. I have been working on getting my FPGA board to sample analog audio with the internal ADC for a project proposed by a colleague as a way to learn the intricacies of digital design. Let me tell you straight: documentation about the ADC of this Artix 7 device does a great job at being confusing. I’m not ashamed to say that this is the part that took me the longest to figure, also considering the paranoia about damaging the components with non-compliant voltages. ...