Title :
A 10-bit 20MHz 38mW 950MHz CT ΣΔ ADC with a 5-bit noise-shaping VCO-based quantizer and DEM circuit in 0.13u cmos
Author :
Straayer, Matthew Z. ; Perrott, Michael H.
Author_Institution :
Massachusetts Inst. of Technol., Cambridge
Abstract :
A combined 5-bit, 1st order noise-shaped quantizer and DEM circuit running at 950MHz based on a multi-phase VCO is presented. This quantizer structure is the key element in a 3rd order noise shaped ADC with 2nd order loop dynamics and a single opamp. Measured performance is 60dB SNR at 20MHz bandwidth in 0.13u CMOS while consuming 32mA from a 1.2V supply.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF oscillators; sigma-delta modulation; voltage-controlled oscillators; CMOS; CT SigmaDelta ADC; DEM circuit; VCO-based quantizer; bandwidth 20 MHz; frequency 950 MHz; multiphase VCO; noise figure 60 dB; noise-shaped quantizer; power 38 mW; size 0.13 mum; voltage 1.2 V; Bioluminescence; Biosensors; CMOS image sensors; CMOS technology; Circuits; Image converters; Noise shaping; Quantization; Sensor arrays; Signal resolution;
Conference_Titel :
VLSI Circuits, 2007 IEEE Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-4-900784-04-8
Electronic_ISBN :
978-4-900784-05-5
DOI :
10.1109/VLSIC.2007.4342737
