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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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Quad Lock Case announced

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Annex Products has announced the rollout of its Quad Lock Case, which is touted to be the ultimate multipurpose mounting system for your precious iPhone.
Just what is the Quad Lock Case capable of? For starters, this is touted to be a safe and easy mounting solution which is capable of mounting itself to just about any surface, ensuring that your iPhone remains in a convenient position regardless of either it being in a portrait or landscape mode, letting you view your favorite photos, enjoy movies and read news, hands-free.
The Quad Lock Case Mount comes in an ultra slim form factor, where it is made up of tough polycarbonate plastic in order to help protect your iPhone’s back during everyday use. You know what they say – the simpler something is, the more beautiful it becomes, and that is exactly the case (pun not intended) with the Quad Lock Case Mount. Featuring a built-in holder which enables it to snap securely on to any of the Quad Lock Mounts, you need not worry about your iPhone’s safety any more even though it might seem as though it is hanging precariously from some other place.

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