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A third-order CT ΔΣ ADC that replaces the multi-bit quantizer and feedback DAC by a pulsewidth modulation (PWM) generator and time-to-digital converter (TDC) is implemented in 65 nm CMOS technology. The TDC provides a 50-level binary output code and a time-quantized feedback pulse to the modulator. It is shown that the TDC can achieve 11 bit linearity in time steps without calibration...
Low-power, small-area, 20 MHz-BW ADCs that can be integrated in nanoscale CMOS technologies are of immense interest to the wireless communication industry. Implementation of high-performance analog circuits in nanometric technologies faces several challenges. Time-domain digital signal processing (TDSP) can be used as an alternative for some analog circuits to overcome these challenges. The TDSP technique...
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