Title :
A VCO-based analog-to-digital converter with second-order Sigma-Delta noise shaping
Author :
Park, Min ; Perrott, Michael H.
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
A voltage-controlled oscillator (VCO) based analog-to-digital converter (ADC) utilizing Sigma-Delta (Sigma-Delta) techniques for second order quantization noise shaping is presented. A custom IC prototype of this highly digital architecture achieves 60-dB signal-to-noise ratio (SNR) over a 1-MHz bandwidth with 800-MHz sampling rate. It was fabricated in a 0.18-mum 1-poly 5-metal CMOS technology.
Keywords :
CMOS integrated circuits; sigma-delta modulation; voltage-controlled oscillators; ADC; CMOS technology; SNR; VCO-based analog-to-digital converter; bandwidth 1 MHz; noise figure 60 dB; second order quantization noise shaping; second-order sigma-delta noise shaping; signal-to-noise ratio; size 0.18 mum; Analog-digital conversion; Bandwidth; CMOS technology; Delta-sigma modulation; Digital integrated circuits; Noise shaping; Prototypes; Quantization; Signal to noise ratio; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118466
