Nettsider med emneord «PCB»

The development of integrated circuit technologies makes it possible to integrate complete systems on one chip consisting of microprocessors, RAM, dedicated digital modules as well as analogue elements like sensor front-ends, RF modules and power regulators, image pixels, MEMS-structures (pressure sensors, mechanical switches, accelerometers), high quality coils and capacitors etc. This is known as System on Chip (SoC). Development of a SoC is done in several steps where the different modules are developed and verified in different devices before they may be combined into one circuit.

At the nanoelectronics group we have recently produced an integrated CMOS chip with a micro-electrode array (MEA) on it's surface for the purpose of measuring bio-impedance of biological cell cultures. The principle of measuring bio-impedance is to measure detailed electrical properties of biological samples. The presence of certain molecules has an influence on these electrical properties and one can thus for instance indirectly detect blood glucose or other substances. Even more suited are structural and physiological changes in the cell cultures. It's for example possible to distinguish a healthy cell culture from one that is straining, or to simply monitor the growth of a cell culture.