Browsing by Author "Yang, MSC"

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Investigation of different input-matching mechanisms used in wide-band LNA design
(2005-02-01)
Hu, R
;
Yang, MSC
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper analyzes different input-matching mechanisms used in designing the wide-band amplifiers in general, and the low noise amplifiers (LNA) in particular, and their corresponding noise impact. Among them, the most promising one is the reactive-feedback circuit configuration, which is a combination of high-frequency inductive feedback and low frequency capacitive feedback. In this paper the simulated result that both matched input impedance and low noise temperature T-n can be achieved simultaneously over a wide bandwidth in the single-ended low noise amplifier is proved mathematically and is well interpreted. This understanding of reactive feedback is crucial for the future development of ultra-wide-band low-noise amplifiers.