This paper describes flash ADC design using linearity improved threshold quantized comparator. Here, the need for a reference voltage generation network has been eliminated in a 4 bit flash ADC; with completely digital cell based comparators. Output generated from comparator called thermometer code is related mathematically with binary conversion. This conversion property is used for mathematical modeling and complexity reduction of decoder circuitry by semi-parallel structuring of comparators.

more »

... Circuit is designed in 250nm technology and it exhibits satisfactory performance even in temperature and process variation.