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A new differential Voltage-Controlled Delay Unit (VCDU) is proposed. The VCDU converts an input voltage into a pulse delay, and delivers it to a Time-to-Digital Converter (TDC) which outputs a digital word. Both circuits form a Time-Based Analog-to-Digital Converter (ADC). In scaled CMOS technology, the Time-Based ADC is a substantial block in designing Software Defined Radio (SDR) receivers, as it...
Time-Based Analog-to-Digital Converter (ADC) becomes the key of the new era of scaling CMOS technology. It provides a lower power and area than conventional ADCs. These improvements urges the Time-Based ADC to overcome Software Defined Radio (SDR) receivers' challenges and to be a dominant module in designing them. Such an SDR receiver can adapt itself automatically to deal with the desired bandwidth...
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