Abstract
The stray capacitance between long wires in a cryogenics systems will slow down measurement rate, and also introduce unnecessary noise pick up. It is necessary to install the preamplifier as close to the signal source as possible to diminish the capacitive coupling effects. The most commonly used semiconducting device for this purpose is the MOSFET, which can function at liquid helium temperatures. Under special operation procedures, an all MOSFET operational amplifier can also be operated at liquid helium temperature. The use of opamp will simplify the construction of more complicated circuitry for low temperature applications.
Original language | English |
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Pages (from-to) | 157-158 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 194-196 |
Issue number | PART 1 |
DOIs | |
State | Published - Feb 2 1994 |
Bibliographical note
Funding Information:*Research supported by NSF grants DMR-89-13854 and EHR-91-08764.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering