MULTI-BIT SUCCESSIVE APPROXIMATION ANALOG-DIGITAL CONVERSION CAPABLE OF GENERATING DIGITAL EXPRESSION BY PROCESSING AN ANALOG INPUT SIGNAL BY SUCCESSIVE STEPS

摘要

PURPOSE: A successive approximation analog-digital conversion circuit is provided to reduce the area of a chip nd power consumption.;CONSTITUTION: An ADC circuit(100) includes a reference voltage division circuit(120), a comparator circuit(130), and a thermometric decoder(140). The reference voltage division circuit divides a reference voltage applied to ports(110,112) into multiple sub-reference voltages. The comparator circuit compares each sub-reference voltage with an analog signal. The thermometric decoder converts the transmitted comparison result into an n-bit output signal(142).;COPYRIGHT KIPO 2013;[Reference numerals] (140) Thermometric decoder; (142) N-bit output code