Abstract: A device for determining the concentration of a predefined gas in a medium includes a first sensor for determining the gas concentration in a flow of the medium; a second sensor for determining a physical parameter of the medium in the flow of the medium; and a processing device, which is set up to determine the quality of the determination using the first sensor on the basis of a signal from the second sensor.

Abstract: The present disclosure provides an analog counter circuit for use in a minimal-sized circuitry. The analog counter circuit of the present disclosure can provide much higher resolution versus power consumption and layout area as compared to conventional digital counters. The analog counter circuit of the present disclosure can also provide much better bias supply management, step accuracy, multi-element step uniformity and lower supply spiking as compared to conventional analog counter architectures. The compact size of the disclosed counter circuit allows better integration of arrayed elements, such as, an array of image sensing pixels or an array of artificial neurons.