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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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Scoche CellControll mobile phone blocker

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Imagine yourself driving a car. Suddenly, you receive a text message or a phone call, but you can’t answer it. You know that you shouldn’t answer while driving, but that flashing indicator just can’t get out of your mind. It tempts you to answer. If you know what I’m talking about, the thing above is just for you.


The CellControl designed to block certain use of a mobile phone while you drive. The phone will receive any information sent by the operator but it won’t show up until you stop the car. The hardware part of the system plugs into the car’s OBD-II port and is online only when you move. The app part must be installed on your phone. Unfortunately, there is no app for iPhone and there is no information releasing one. The CellControl device sells for $ 129.95 and is available now.

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