Effect of a PWM feedback DAC on the noise and linearity of a delta-sigma ADC
Effect of a PWM feedback DAC on the noise and linearity of a delta-sigma ADC
- Author(s): J.R. Pickering ; D. Georgakopoulos ; J.M. Williams ; P.S. Wright
- DOI: 10.1049/cp:20050150
For access to this article, please select a purchase option:
Buy conference paper PDF
Buy Knowledge Pack
IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.
5th IEE International Conference on ADDA 2005. Advanced A/D and D/A Conversion Techniques and their Applications — Recommend this title to your library
Thank you
Your recommendation has been sent to your librarian.
- Author(s): J.R. Pickering ; D. Georgakopoulos ; J.M. Williams ; P.S. Wright Source: 5th IEE International Conference on ADDA 2005. Advanced A/D and D/A Conversion Techniques and their Applications, 2005 p. 159 – 164
- Conference: 5th IEE International Conference on ADDA 2005. Advanced A/D and D/A Conversion Techniques and their Applications
- DOI: 10.1049/cp:20050150
- ISBN: 0 86341 542 3
- Location: Limerick, Ireland
- Conference date: 25-27 July 2005
- Format: PDF
In the development of a sub ppm, metrology class, delta-sigma ADC, pulse width modulation (PWM) was chosen to achieve multi-bit feedback. PWM DACs have been used in precision DC calibrators operating with linearity in the 1E-7 region and it is well known that multi-bit DACs in delta sigma modulators offer significant advantages over simple 1 bit types. This paper describes many of the practical difficulties encountered and overcome in combining these two techniques to achieve metrology class performance. This work continues from ideas presented at ADDA Pickering, JR (2002) following on from pioneering work reported at ADDA Pett, JG (1999). For a general treatise on delta-sigma see "Candy & Temes" (1992).
Inspec keywords: pulse width modulation; delta-sigma modulation; analogue-digital conversion; modulators
Subjects: Modulators, demodulators, discriminators and mixers; A/D and D/A convertors; Modulation and coding methods
Related content
content/conferences/10.1049/cp_20050150
pub_keyword,iet_inspecKeyword,pub_concept
6
6