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This paper introduces a low-noise, low-power amplifier for high-impedance sensors. An innovative circuit using an auto-zeroed architecture combined with frequency modulation to reject offset and low-frequency noise is proposed and analysed. Special care was given to avoid broadband noise aliasing and chopping in the signal path, and to minimize both the resulting equivalent input offset voltage and...
The design and measurements results of analog-to-digital converter implemented in CMOS 180 nm technology have been presented in this paper. The successive approximation architecture with charge redistribution has been chosen. Much emphasis was placed on limiting the area occupancy of the whole chip so as its power consumption, which makes the described circuit suitable for multichannel applications...
This paper presents a discrete model of the DC charge-up phase in a single MOS diode rectifier for an inductively coupled RFID system. The model was derived for a rectifier driven by a coil antenna and with a storage capacitor connected to the output. A comparison between the model and a simulation of a rectifier implemented in a 0.35 µm CMOS process demonstrated fast and accurate modeling of the...
Polyethylenedioxythiophene polystyrene-sulphonate PEDOT:PSS, is a conductive polymer which is widely investigated. The conductivity of the material depends highly on the purity of the product and the application process. It varies from 90–5000 Ωcm. Different brands (3) of PEDOT:PSS have been used in making “capatteries”, devices which are somewhat in between capacities and batteries. The textile based...
In this paper we present a measurement system for multichannel recordings of the electrophysiological activity of brain tissue in vivo. The system consists of: penetrating Microelectrode Array (MEA), three versions of a Conditioning Module each equipped with different Application Specific Integrated Circuits (ASIC's), Digitizer and PC Application for recorded data presentation and storage. The MEA...
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