Hi All... I've been thinking about using a Cypress Semiconductor (www.cypress.com) serial Programmable Clock Generator (PCG) as a VFO. I think the PLL-based design would have much cleaner output compared to a DDS. But I have some questions:
Do any of the decent PC programs for SDR control either the Blueberry or Peppermint PGC eval boards via USB? Are the Cypress parts the best solution out there in terms of PLL-based PCGs? It seems Cypress has discontinued the Blueberry evaluation board for the CY27EE16 PCG (P/N CY30703). There is a $20 USD Peppermint eval board available though (P/N CY30701). Peppermint is USB capable. Peppermint is based on the CY22393 part, which seems fine, SPI programmable, three PLL's, up to 200MHz 4X4 crosspoint switch. Has anyone used the Peppermint board? Are there any disadvantages to using the CY22393 instead of the older CY27EE16 that was on the now discontinued Blueberry board? The only down-side I can see is minor: The older part supported both SPI and I2C serial protocols, the latter part does SPI only. Thanks, David
