The invention relates to devices for performing single step assays for the determination of the presence or absence of an analyte in a liquid sample, and methods of determining the presence or absence of such analytes using such devices. The operation of generating multiple descriptions further includes the operations of obtaining a spectral representation of the data, including bands associated to different ranges, the bands being obtained by a suitable quantization operation and including at least one highly quantized band, that is subjected to a higher degree of quantization. The driving unit is disposed in the body. This allows for a stable glow discharge to be maintained for a wide range of operating pressures and in a wide range of electric fields include DC and RF fields of varying strength. The isolated stack-gate flash cell structure is used to form two contactless parallel divided sourcedrain diffusion bit-lines arrays.