A Low Distortion 3rd-Order Continuous-Time Delta-Sigma Modulator for a Worldwide Digital TV-Receiver

Authors :: Shiro Sakiyama
Masao Takayama
Shiro Dosho
Yosuke Mitani
Yusuke Tokunaga
Koji Obata
Kazuo Matsukawa
Source :: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. :471-478
Publication Year :: 2012
Publisher :: Institute of Electronics, Information and Communications Engineers (IEICE), 2012.
Abstract: This paper presents a low distortion 3rd-order continuous-time delta-sigma modulator for a worldwide digital TV-receiver whose peak SNDR is 69.8dB and SNR is 70.2dB under 1V power supply. To enhance SNDR performance, the mechanisms to occur harmonic distortions at feedback current-steering DAC and flash ADC have been analyzed. A low power tuning system using RC-relaxation oscillator has been developed in order to achieve high yield against PVT variations. A 3rd-order modulator with modified single opamp resonator contributes to cost reduction by realizing a very compact circuit. Reduction schemes of the distortions enabled the modulator to achieve FOM of 0.18pJ/conv-step.

Subjects :: Total harmonic distortion
Computer science
Applied Mathematics
Flash ADC
Delta-sigma modulation
Computer Graphics and Computer-Aided Design
Power (physics)
law.invention
Reduction (complexity)
Resonator
law
Control theory
Signal Processing
Harmonic
Operational amplifier
Electronic engineering
Electrical and Electronic Engineering

ISSN :: 17451337 and 09168508
Database :: OpenAIRE
Journal :: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Accession number :: edsair.doi...........4cb8d072eb9bd1cdc02c8ca8d7311a52
Full Text :: https://doi.org/10.1587/transfun.e95.a.471

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