1 Correction to: Circuits Syst Signal Process https://doi.org/10.1007/s00034-017-0530-9

The original version of the article is missing the below funding information. This has been corrected with this erratum.

The work of P. Patronik was supported by Polish Narodowe Centrum Nauki (NCN) under Grant UMO-2011/01/B/ST7/06120