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Browse Journals & Magazines > Ultrasonics, Ferroelectrics a ...> Volume:44 Issue:2 Help

Guidelines for designing BJT amplifiers with low 1/f AM and PM noise

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3 Author(s)
Ferre-Pikal, E.S. ; Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Walls, F.L. ; Nelson, C.W.

In this paper we discuss guidelines for designing linear bipolar junction transistor amplifiers with low 1/f amplitude modulation (AM) and phase modulation (PM) noise. These guidelines are derived from a new theory that relates AM and PM noise to transconductance fluctuations, junction capacitance fluctuations, and circuit architecture. We analyze the noise equations of each process for a common emitter (CE) amplifier and use the results to suggest amplifier designs that minimize the 1/f noise while providing other required attributes such as high gain. Although we use a CE amplifier as an example, the procedure applies to other configurations as well. Experimental noise results for several amplifier configurations are presented.

Published in:
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on  (Volume:44 ,  Issue: 2 )

Date of Publication: March 1997

Page(s):
335 - 343
ISSN :
0885-3010
INSPEC Accession Number:
5562924
Digital Object Identifier :
10.1109/58.585118
Product Type:
Journals & Magazines
Date of Current Version :
06 August 2002
Issue Date :
March 1997
Sponsored by :
IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society
PubMed ID :
18244131

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