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SAR ADC architecture using time domain processing


Successive approximation (SAR) type Analog to Digital Conveter (ADC) is a Nyquist Rate ADC which has acquired tremendous pupularity recently due to its digital nature , minimal complexity and tiny foot print .These merits make them the most energy ecient topology for analog to digital conversion available today well suited for battery powered applications like touch screen controllers , wireless communication systems , Motion detectors etc. Enhancements in these domains is greatly linked to breakthroughs improving speed as well as performance of SAR type ADCs . In this Work we tried to understand SAR topology in depth therby opening up a new 'time' dimesion to harness more information during the SAR conversion process. A new architecture is proposed in which this auxilliary dimension is employed to signicantly improve eciency and throughput over existing SAR ADC implementations .

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