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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

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Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of
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REAL-TIME FACE DETECTION AND TRACKING

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Face detection and tracking has been an important and active research field because it offers many applications, especially in video surveillance, biometrics, or video coding. The goal of this project was to implement a real-time system on an FPGA board to detect and track a human’s face. The face detection algorithm involved color-based skin segmentation and image filtering. The face location was determined by calculating the centroid of the detected region. A software version of the algorithm was independently implemented and tested on still pictures in MATLAB. Although the transition from MATLAB to Verilog was not as smooth as expected, experimental results proved the accuracy and effectiveness of the real-time system, even under varying conditions of lights, facial poses and skin colors. All calculation of the hardware implementation was done in real time with minimal computational effort, thus suitable for power-limited applications.
 lab setup

Full report (pdf)

Code