Dave McGuire <mcgu...@neurotica.com> writes: > On 3/27/11 6:05 AM, Stephan Boettcher wrote: >> I am designing a lot of boards with an LPC2141 ARM7, Altera 3c25, USB >> client, RS232, SPI, uSD. No ram, no Linux, just the builtin flash and >> RAM of the ARM and FPGA, and 1MByte SPI flash. The frontend is fitted >> with a variable number of ADCs of various types. >> >> It is optimized for precision analog measurements. The FPGA and the ARM >> live on differnt ground planes, with LVDS-IO between, to isolate the >> noisy digital world (computer) from the frontend. This board is >> sandwiched between a power regulator board and a preamplifier board. >> The inputs to the preamps are usially quoted in pA or fC, that is just a >> few electrons. >> >> I don't think this is what you asked for, but, if that comes close to >> what you need, and are ready to do your board yourself, I will share my >> design to work from. Most work is in the software/firmware. > > That sounds like a very powerful platform for general metrology > applications. I'd love to get my hands on one of those boards. If > you decide to publish the info or sell any boards, please let me know!
Well, I design a new board for every problem, because each problem requires it's special frontend, like == 18 * AD7276, 3 MSPS, 12bit, each with a shaper AD8005 == 2 * AD9251, 4 channels, 80MSPS, 14 bit, with AD8138 preamps. == 9 * AD7690, 9 channels, 400 kSPS, 18 bit, with AD8131 preamps. == 1 * AD9649, and LVDS IO, to test variuos ASICS. == 0 * ADC, but an SRAM, to test/emulate interfaces with downstream systems. The backend, ARM, FPGA is always the same, as is the ARM firmware, and a good part of the FPGA code. So, no boards, but I may put the design online when I find the time to package it. -- Stephan _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user