DocumentCode
2790856
Title
A 69.8 dB SNDR 3rd-order Continuous Time Delta-Sigma Modulator with an Ultimate Low Power Tuning System for a Worldwide Digital TV-Receiver
Author
Matsukawa, Kazuo ; Mitani, Yosuke ; Takayama, Masao ; Obata, Koji ; Tokunaga, Yusuke ; Sakiyama, Shiro ; Dosho, Shiro
Author_Institution
Panasonic Corp., Moriguchi, Japan
fYear
2010
fDate
19-22 Sept. 2010
Firstpage
1
Lastpage
4
Abstract
This paper presents a 3rd-order continuous time delta-sigma modulator for a worldwide digital TV-receiver whose SNDR is 69.8 dB. An ultimate low power tuning system using RC-relaxation oscillator is 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 very compact circuit. The mechanism to occur 2nd-order harmonic distortion at current feedback DAC was analyzed and a reduction scheme of the distortion enabled the modulator to achieved FOM of 0.18 pJ/conv-step.
Keywords
circuit tuning; continuous time systems; cost reduction; delta-sigma modulation; harmonic distortion; low-power electronics; operational amplifiers; relaxation oscillators; 2nd-order harmonic distortion; 3rd-order modulator; FOM; PVT variations; RC-relaxation oscillator; SNDR 3rd-order continuous time delta-sigma modulator; compact circuit; cost reduction; current feedback DAC; single opamp resonator; ultimate low power tuning system; worldwide digital TV-receiver; Calibration; Frequency modulation; Harmonic distortion; Oscillators; Signal to noise ratio; Tuning;
fLanguage
English
Publisher
ieee
Conference_Titel
Custom Integrated Circuits Conference (CICC), 2010 IEEE
Conference_Location
San Jose, CA
ISSN
0886-5930
Print_ISBN
978-1-4244-5758-8
Type
conf
DOI
10.1109/CICC.2010.5617591
Filename
5617591
Link To Document