sigma Delta adc is designed mainly by oversampling the signal much higher than Nyquist rate.you can post any document regarding the topic.

Both microcontroller and FPGA is an important part of embedded system design. But both of them have some limitation. Post if you have any idea about it...

Here is a simple data logger designed by 8951 and 0804 adc . Data transferred serially to PC. Data is checked by hyper terminal.A user access program is required to represent the data properly