Low-noise amplifier design with dual reactive feedback for broadband simultaneous noise and impedance matching

Chang Tsung Fu*, Chien-Nan Kuo, Stewart S. Taylor

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

The simultaneous noise and impedance matching (SNIM) condition for a common-source amplifier is analyzed. Transistor noise parameters are derived based on the more complete hybrid-π model, and the dominant factors jeopardizing SNIM are identified. Strategies for narrowband and broadband SNIM (BSNIM) are derived accordingly. A dual reactive feedback circuit along with an LC-ladder matching network is proposed to achieve the BSNIM. It includes a capacitive and an inductive feedback, where the former utilizes the transistor parasitic gate-to-drain capacitance and the latter is formed by transformer coupling. This circuit topology has been validated in 0.18- and 0.13- μm CMOS technologies for a 311-GHz ultra-wideband (UWB) and a 2.45.4-GHz multistandard application, respectively. The 311-GHz UWB low-noise amplifier is detailed as a design example.

Original languageEnglish
Article number5431031
Pages (from-to)795-806
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Volume58
Issue number4
DOIs
StatePublished - 1 Apr 2010

Keywords

  • Broadband input matching
  • Capacitive feedback
  • Low power
  • Low-noise amplifier (LNA)
  • Noise optimized design
  • Simultaneous noise and impedance matching (SNIM)
  • Transformer feedback
  • Ultra-wideband (UWB)

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