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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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Western Digital MyBook Thunderbolt Duo

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Western Digital MyBook Thunderbolt Duo  eyes on 



6TB specs


  • Desktop hard drive
  • 6 TB
  • Platter
  • January 10, 2012

General

  • Desktop hard drive
  • 6 TB
  • Platter
  • 3.5 inches

Connections

  • 2 port(s)

Power

  • External

Pricing & availability


  • Pre-release
  • January 10, 2012

Colors



at Macworld 2012, Western Digital demoed a preview of their essentially finished, yet not final, MyBook Thunderbolt Duo. Scheduled to ship in Q1 for an "aggressive price," the unit plays host to two 3.5-inch drives, which'll come stuffed from the factory in either 4TB (2x 2TB) or 6TB (2x 3TB) configurations. On the outside, you're looking at the MyBook aesthetic you either love or loathe, but around back you'll find all connectivity has been gutted, save for power and two Thunderbolt ports. The latter means that up to six can be daisy-chained off one interconnect, which when setup in RAID 0 equates to rather speedy transfers, like 700MB/sec reads and 500MB/sec writes in the four-unit demonstration configuration we toyed with. And it's future proof too, as there's a door up-top which enables plebes to swap drives should the need arise. We'll keep an ear out for pricing, but until that day arrives, peep them in the gallery below, or in video form after the break.

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