Referenced Items are not available for this document.
A new low-distortion variable-gain amplifier (VGA) is proposed and analyzed. The VGA's gain is controlled through changing the transconductance of a common-drain FET (CDF) in the negative feedback path. The analysis and prototype results indicate that the third-order intermodulation-distortion ratio is greatly improved at high input-power levels due to a drastic reduction in the VGA's input impedance and the CDF's unilateral characteristic. The gain in a wide temperature range maintains stability due to the combination effect of the transconductances of the CDF and the amplifying FET. This CDF feedback VGA is very useful for developing a wide-dynamic range front-end MMIC. The noise and thermal performances were also measured
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:43
,
Issue:
12
)
Date of Publication: Dec 1995
- Page(s):
- 2812 - 2816
- ISSN :
- 0018-9480
- INSPEC Accession Number:
- 5179689
- Digital Object Identifier :
- 10.1109/22.475639
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Dec 1995
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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