A Continuous-Time VCO-assisted VCO-based ΣΔ Modulator with 76.6dB SNDR and 10MHz BW

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	A Continuous-Time VCO-assisted VCO-based ΣΔ Modulator with 76.6dB SNDR and 10MHz BW
	Du, Y; He, T; Jiang, Y; Sin, S. W.; U, S.P.; Martins, R. P.
	2013-05-19
Source Publication	IEEE International Symposium on Circuits and Systems (ISCAS)
Pages	373-376
Publication Place	US
Publisher	IEEE
Abstract	In this paper, a new VCO-assisted VCO-based sigma-delta (ΣΔ) modulator is proposed to improve the linearity of the VCO-based quantizer. The assistant network in the digital feedforward path reduces the input swing of the VCO-based quantizer in the main path, and then adds it together through the digital cancellation path to keep the same signal before and after quantization. Moreover, the merit of the auxiliary VCO increases the tolerance to DAC mismatches because of its intrinsic DEM function, which also simplifies the digital circuit part. A first order continuous-time (CT) ΣΔ modulator with the proposed structure is designed and simulated in a 65nm CMOS process. The performance of the modulator can reach 76.6dB/82.4dB SNDR/SNR with second order noise shaping and 84dB DR within a 10MHz bandwidth and a sampling frequency of 1.4GHz, consuming 9.4mW of power.
Keyword	Analog-to-Digital Converters ADC
URL	View the original
Language	英語English
The Source to Article	PB_Publication
PUB ID	10655
Document Type	Conference paper
Collection	DEPARTMENT OF PUBLIC HEALTH AND MEDICINAL ADMINISTRATION
Recommended Citation GB/T 7714	Du, Y,He, T,Jiang, Y,et al. A Continuous-Time VCO-assisted VCO-based ΣΔ Modulator with 76.6dB SNDR and 10MHz BW[C], US:IEEE, 2013, 373-376.
APA	Du, Y., He, T., Jiang, Y., Sin, S. W.., U, S.P.., & Martins, R. P. (2013). A Continuous-Time VCO-assisted VCO-based ΣΔ Modulator with 76.6dB SNDR and 10MHz BW. IEEE International Symposium on Circuits and Systems (ISCAS), 373-376.

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