Title :
A 75dB DR 50MHz BW 3rd order CT-ΔΣ modulator using VCO-based integrators
Author :
Young, B. ; Reddy, Karthikeyan ; Rao, Smitha ; Elshazly, Amr ; Anand, Tejasvi ; Hanumolu, Pavan Kumar
Author_Institution :
Oregon State Univ., Corvallis, OR, USA
Abstract :
A wide bandwidth, high sample rate 3rd order continuous-time ΔΣ modulator using VCO-based integrators is presented. Non-idealities caused by VCOs at the modulator frontend are addressed using both circuit- and architecture-level techniques. Fabricated in 65 nm CMOS, the prototype modulator operates at 1.28 GS/s and achieves a dynamic range of 75 dB, SNR of 71 dB in 50 MHz bandwidth, while consuming 38 mW of total power.
Keywords :
CMOS integrated circuits; delta-sigma modulation; voltage-controlled oscillators; 3rd order CT-ΔΣ modulator; CMOS process; VCO-based integrators; architecture-level techniques; circuit-level techniques; frequency 50 MHz; modulator frontend; power 38 mW; size 65 nm; Bandwidth; CMOS integrated circuits; Delays; Modulation; Signal to noise ratio; Voltage-controlled oscillators;
Conference_Titel :
VLSI Circuits Digest of Technical Papers, 2014 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4799-3327-3
DOI :
10.1109/VLSIC.2014.6858395
