Title :
An Active "Cold" Noise Source
Author :
Frater, Robert H. ; Williams, David R.
fDate :
4/1/1981 12:00:00 AM
Abstract :
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.
Keywords :
Active noise reduction; Circuit noise; Equivalent circuits; FETs; Frequency; Impedance; Inductance; Low-frequency noise; Noise generators; Temperature;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1981.1130355
