Investigation of Different Input-Matching Mechanisms Used in Wide-Band LNA Design |
| |
Authors: | Robert Hu and Mark S C Yang |
| |
Institution: | (1) Department of Electronics Engineering, National Chiao Tung University, Hsin-Chu, Taiwan Republic of China;(2) VIA Technologies, Taipei, Taiwan Republic of China |
| |
Abstract: | 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 Tn 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. |
| |
Keywords: | Input matching wide-band LNA resistive feedback inductive feedback capacitive feedback reactive feedback |
本文献已被 SpringerLink 等数据库收录! |