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An Active "Cold" Noise Source

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2 Author(s)

An active circuit which behaves like a "cold" noise source is described. The circuit which uses a gallium arsenide FET is given the name COLFET. The appropriate theory is developed and practical circuits described using the circuit. Equivalent noise temperatures of less than 50 K have been measured for a 50-omega source at 1400 MHz.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:29 ,  Issue: 4 )

Date of Publication:

Apr 1981

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