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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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ipad 5 coming in march 2013

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iPad 5 rumored to launch in march 2013

finally  the rumors of the fifth-generation iPad (iPad 5) and iPad Mini 2 have surfaced in china. the leaks are to be believed, the iPad 5 will be thinner and lighter, and also feature a new design that’s similar to the iPad Mini . 
 
The iPad Mini 2 will keep the same 7.9-inch display, but make the jump to Retina resolution (2048×1536) and also move to the A6X SoC (currently in the iPad 4).
The new fifth-generation iPad will be 4mm shorter, 16mm narrower, and 2mm thinner than the fourth-gen iPad — in other words, it’ll look a lot like the iPad Mini, with its narrower portrait bezel. By decresing 2mm in depth, the iPad 5 would be just 7.4mm. 
This size reduction will reduce the weight of the iPad 5, but it might also impact battery life, unless Apple has a new technology hidden to give the users with more power in minimum possible size.
iPad Mini, front, back, side
The iPad Mini 2 is probably a more exciting proposition. If the rumors are correct, this diminutive iPad will feature a 2048×1536 (326 PPI) display and the bleeding-edge A6X SoC. 
This would mean that the iPad Mini 2 would have the same hardware spec as the iPad 4 — but half the weight and half the price. Suffice it to say, if the iPad Mini wasn’t exciting enough to divert attention away from the Nexus 7 and Kindle Fire, then this second generation certainly would be.  It will probably be released in March 2013 . 

 Apple’s last few product refreshes have focused more on gradual evolution (i.e. milking profits) than making huge technological leaps. At the moment there is a clear technological gap between the full-size iPad and the Mini — this rumored iPad Mini 2 would basically mean the iPad’s only advantage is a slightly larger screen. But who knows: If Apple feels threatened in the 7-inch tablet space, then an overpowered iPad Mini 2 would be a very good way of silencing the rival market products.
so keep your fingers crossed to get your hands on the new upcoming ipad 5.

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