Operation of an opamp at liquid helium temperature.

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 languageEnglish
Pages (from-to)157-158
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberPART 1
StatePublished - 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


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