A FET* Operational Amplifier Circuit for Photoelectric Photometry

Details A FET* Operational Amplifier Circuit for Photoelectric Photometry A FET* Operational Amplifier Circuit for Photoelectric Photometry

Jun 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972javso...1...60s&link_type=abstract

The Journal of the American Association of Variable Star Observers, vol. 1, no. 2, p. 60-61

Computer Science

1

Variables, Photoelectric Photometry, Field Effect Transistor

Scientific paper

Recent improvements in solid state semiconductor technology have resulted in a number of manufactures (Intersil, Signetics, Fairchild) offering low cost operational amplifiers with input resistances of the order of 10^12 ohms and input currents of the order of a few picoamperes. These components are ideal for the low current measurements made in stellar photometry. Along with low cost, these components are very small and extremely stable.

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