Özet:

FET based biosensors are more promising devices for detecting cancer due to cost benefits, faster response and simple approach. For a biosensor to be used in a real environment for both clinical and lab applications, the electronic circuits that process the signals from biosensors and identify the changes in signal properties is a significant activity. The design of interface circuits and signal conditioning circuits need to be designed according to the biosensor responses.In this work, the design of a biosensor array interfacing circuit is carried out using CNTFETs. In order to improve the sensor performances, sensor arrays are developed. The design of sub-circuits for interfacing circuits and signal conditioning circuits is also presented. The sensitivity is enhanced with a sensor array model that has eight columns of series-connected biosensors. The 8x8 array model is interfaced with an instrumentation amplifier. The analog readout circuit is designed with a reference electrode for the real-time comparison of the sensor array model. All of the circuits are designed using CNTFETs, modelled using SPICE coding and simulated in SPICE environment.

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