Sensitivity of single-bit continuous-time Delta Sigma analogue-to-digital converters to out-of-band blockers Academic Article

abstract

• The sensitivity of single-bit continuous-time (CT) analogue-to-digital converters to out-of-band (OOB) blockers received in companion with desired signals is investigated. In essence, the residual interferer signal appearing at the output of the CT loop filter can flip the single-bit quantiser decision near the zero crossings of the loop filter output signal. An intuitive analysis of this effect on the performance of single-bit modulators in the presence of OOB interferers is provided. System level simulations for a single-bit fifth-order CT modulator at an oversampling ratio of 40 have been carried out. A reduction in the achievable signal-to-noise-plus-distortion ratio, that can be as large as 10dB when applying a 0 dBFS OOB blocker tone along with a weak -75dBFS desired tone, has been observed. The simulation results show good agreement with the adopted theoretical discussion. 2010 The Institution of Engineering and Technology.

authors

• Hoyos, Sebastian

published proceedings

• ELECTRONICS LETTERS

author list (cited authors)

• Saad, R., & Hoyos, S.

citation count

• 1

complete list of authors

• Saad, R||Hoyos, S

publication date

• June 2010

publisher

• Institution of Engineering and Technology (IET)  Publisher

published in

• Electronics Letters  Journal

keywords

• 40 Engineering
• 4006 Communications Engineering
• 4009 Electronics, Sensors And Digital Hardware

Digital Object Identifier (DOI)

• 10.1049/el.2010.1164

start page

• 826

end page

• 827

volume

• 46

issue

• 12

URL

• http%3A%2F%2Fdx.doi.org%2F10.1049%2Fel.2010.1164