Inherently Linear Time Symmetric Pulse Width Modulation

被引：0

作者：

Hu, Yue ^{[1
]}

Xu, Yang ^{[1
]}

Moon, Un-Ku ^{[1
]}

机构：

[1] Oregon State Univ, Corvallis, OR 97331 USA

来源：

2014 IEEE PROCEEDINGS OF THE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC) | 2014年

关键词：

CMOS analog integrated circuits; delta-sigma modulation; pulse width modulation; time-based quantization;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes a new category of pulse-width-modulation (PWM), time-symmetric PWM (TSPWM). This TSPWM technique removes the intrinsic harmonic distortion from PWM without using calibration or adding circuit complexity. To demonstrate the proposed technique, a PWM modulator using TSPWM is implemented as the voltage-to-time interface that modulates the voltage input to binary pulses at modulation frequency of 25MHz. It is followed by a first order noise-shaped switched-ring-oscillator (SRO) time-to-digital converter (TDC) quantizing the pulse train at sample rate of 400MHz. Built in 0.18 mu m, the prototype chip shows a SFDR improvement of 24dB on the TDC output when TSPWM is used.

引用

页数：4

共 6 条

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[4] Rao S., 2011, 2011 Symposium on VLSI Circuits. Digest of Technical Papers, P270
[5] Razavi B., 2017, Design of Analog CMOS Integrated Circuits, V2nd
[6] The frequency spectrum of pulse width modulated signals
Song, ZK
Sarwate, DV
[J]. SIGNAL PROCESSING, 2003, 83 (10) : 2227 - 2258

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