Title :
A purely-VCO-based single-loop high-order continuous-time ΣΔ ADC
Author :
Yeonam Yoon ; Kyoungtae Lee ; Peijun Wang ; Nan Sun
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
This paper reports a voltage-controlled oscillator (VCO)-based single-loop continuous-time (CT) ΣΔ analog-to-digital converter (ADC) that does not need any OTA-based analog integrator. It achieves the second-order noise shaping by cascading two VCO-based integrators and removing the sampling operation in the first VCO-based integrator. Behavioral simulations confirm the validity of the proposed ADC architecture.
Keywords :
sigma-delta modulation; voltage-controlled oscillators; CT ΣΔ ADC architecture; VCO-based integrators; analog-to-digital converter; behavioral simulations; purely-VCO-based single-loop high-order continuous-time ΣΔ ADC; second-order noise shaping; voltage-controlled oscillator; Bandwidth; Noise; Noise shaping; Pulse width modulation; Quantization (signal); Standards; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865288
