Paper Title:
An Auto ranging Data Converter Implementation in FPGA
Author Name:
Jithin Krishnan, Sreekumari B, Jiju K
Abstract:
A novel project is being presented here for implementation an auto ranging analog to digital converter for biomedical applications completely inside an FPGA - i.e. an all-digital analog to digital (A/D) converter system. The only analog part is the auto ranging circuitry and an RC Integrator outside FPGA. The system outputs 24 bits and features a sigma delta ADC of 16 bits resolution, a range detection unit with 7 bits and a sign bit for polarity detection. The analog part of the modulator is done utilizing the LVDS transceiver in the FPGA making it a real digital one. The digital section of sigma delta ADC containing the decimation filter banks is done in a cascaded filter structure form including a CIC decimation filter, droop compensation and half-band filters. The top level module was coded using VHDL and the simulation was carried out with ModelSim and MATLAB.
Keywords:
Autoranging ADC, Sigma Delta ADC, Digital filter section, 16 bit ADC.
Cite this article:
Jithin Krishnan, Sreekumari B, Jiju K.An Auto ranging Data Converter Implementation in FPGA. International Journal of Advanced Computer Research. 2013;3(10):56-60.