论文信息 - A 0.2V, 7.5 μW, 20 kHz ΣΔ modulator with 69 dB SNR in 90 nm CMOS

A 0.2V, 7.5 μW, 20 kHz ΣΔ modulator with 69 dB SNR in 90 nm CMOS

This paper presents a frequency-to-digital SigmaDelta modulator designed in a digital 90nm CMOS process, operating with a supply voltage of 0.2 V. For a 7.5 muW power consumption, the SNR is 68.9 dB and the SNDR is 60.3 dB over a 20Hz-20kHz bandwidth. This work shows that the SNR/SNDR performance of this kind of SigmaDelta converter can be adjusted over a wide range, while maintaining a state-of-the-art flgure-of-merit of 82 fJ/conversion.

U. Wismar | P. Andreani | D. Wisland

[1] Andrea Baschirotto,et al. Low-Voltage, Low-Power Basic Circuits , 2006 .

[2] M. Høvin,et al. Delta-sigma modulators using frequency-modulated intermediate values , 1997, IEEE J. Solid State Circuits.

[3] A. Hajimiri,et al. Jitter and phase noise in ring oscillators , 1999, IEEE J. Solid State Circuits.

[4] W. Sansen,et al. A 1-V 140-/spl mu/W 88-dB audio sigma-delta modulator in 90-nm CMOS , 2004, IEEE Journal of Solid-State Circuits.

[5] Yngvar Berg,et al. Real-time reconfigurable linear threshold elements implemented in floating-gate CMOS , 2003, IEEE Trans. Neural Networks.

[6] Rudy Van De Plassche. Integrated analog-to-digital and digital-to-analog converters / Rudy Van De Plassche , 1994 .

[7] Peter R. Kinget,et al. 3.6 A 0.5V 74dB SNDR 25kHz CT ∆Σ Modulator with Return-to-Open DAC , 2006 .

[8] Yngvar Berg,et al. Pattern Noise in the Frequency ΔΣ Modulator , 2001 .

[9] U. Wismar,et al. Linearity of bulk-controlled inverter ring VCO in weak and strong inversion , 2005, 2005 NORCHIP.

[10] P. Andreani,et al. On the phase-noise and phase-error performances of multiphase LC CMOS VCOs , 2004, IEEE Journal of Solid-State Circuits.

[11] Wismar,et al. A 0 . 2 V , 7 . 5 W , 20 kHz modulator with 69 dB SNR in 90 nm CMOS , 2009 .