𝔖 Bobbio Scriptorium
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Use of precision low noise monolithic instrumentation amplifiers at low temperatures

✍ Scribed by M.C.M. Atkinson; R.G. Scurlock

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
148 KB
Volume
25
Category
Article
ISSN
0011-2275

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✦ Synopsis

The FET analogue devices AD524AD and AD624AD, precision instrumentation amplifiers, have been successfully used at 77 K. The devices ceased to function when immersed in liquid helium but recovered, without damage, after warming. The gain, set by internal resistors on the chips, was almost independnet of temperature, but a small temperature dependent offset voltage was a standard feature. A pre-amplifier operating down to nitrogen temperatures can thus be implemented by a single low power integrated circuit device with minimal external components for use in cryogenics, metrology and space physics.

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