Неперервно-логічні аналого-цифрові перетворювачі на віддзеркалювачах струму для процесорів зображень та їх моделювання

Abstract

A simple CL_ADC with low power consumption 3 mW and a supply voltage of 1.8- 3.3 V, and at the same time with good dynamic characteristics (conversion frequency even for 1.5 um CMOS technologies is 40 MHz, can be increased 10 times) and accuracy (quantization=15.662.5 nA for Imax=416 mA). The range of optical signals, taking into account the sensitivity of modern photodetectors, can be 1-200 mW One channel ADC with iteration is based on one DAG-(G) and SHD and has only 3540 CMOS transistors, so such 1D, 2D arrays of serial ADCs are very promising for sensors and image processors. The total power consumption of one ADC is only 5070 uW for a maximum input current of 4 mA. For higher productivity and conversion frequency, a parallel-conveyor circuit with parallel-serial outputs is proposed. The maximum error is about 1 LSB, and only for the maximum input current is about 2 LSB for the 8-bit CL_ADC.