Cancellation of Spurious Spectral Components in One-Bit Stimuli Generator
2010 (English)In: Proceedings of IEEEInternational Conference on Signals and Electronic Systems, (ICSES 10) / [ed] Andrzej Pułka and Tomasz Golonek, IEEE , 2010, 393-396 p.Conference paper (Refereed)
This work presents a cancellation technique of non-linear distortion components of one-bit digital stimulus sequence which is generated in software by a ΣΔ modulator. The stimulus is stored in a cyclic memory and applied to a circuit under test through a driving buffer and a simple lowpass reconstruction filter. The distortion components originate from buffer imperfections which result in a possible asymmetry between rising and falling edges of a NRTZ waveform representing the encoded stimulus. We show that the distortion components can be cancelled by using a simple predistortion technique. In addition an on-chip DC-calibrated ADC can be used to identify the second-order nonlinear products of the driving buffer. This procedure allows for cancellation of all the second-order distortions before the actual test and it can be extended to the third order terms as well.
Place, publisher, year, edition, pages
IEEE , 2010. 393-396 p.
IdentifiersURN: urn:nbn:se:liu:diva-61668ISBN: 978-1-4244-5307-8 (print)OAI: oai:DiVA.org:liu-61668DiVA: diva2:370691
International Conference on Signals and Electronic Systems (ICSES), 7-10 Sept, Gliwice, Poland