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This paper presents a 5-bit noninterleaved time-based analog-to-digital converter (ADC), which operates at a 5-GS/s rate. The ADC is designed for the use in radio-astronomy telescopes, for which time interleaving is not acceptable. The ADC employs a dynamic, differential voltage-to-time converter, a folded-flash time-to-digital converter (TDC), and calibration circuitry. To generate reference delays,...
A 4-bit 65nm time-based analog-to-digital converter (ADC) targeting the next-generation Square Kilometre Array (SKA) is presented. This ADC is composed of an analog voltage-to-time converter (VTC) front end and a digital time-to-digital converter (TDC) back end. The two components can be physically separated to minimize the impact of digital noise from the ADC on high-gain, high-sensitivity receiver...
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