2005•Unpublished venueRequires access

Broadband RF feedback amplifier design with simple feedback network

Arjuna Marzuki, T. Zainal, A. Zulkifli, Norlaili Mohd Noh, Zalina Abdul Aziz

Abstract

The paper presents a simple and fast design technique for an RF feedback amplifier. The amplifier uses a series resistor and capacitor as the feedback element. An overview of the amplifier impedance analysis and the noise theory of the amplifier is presented. A high frequency passive component model is also presented. With a current consumption of 6 mA, the simulated amplifier features a noise figure of 2.4 dB and an S/sub 21/ of 14.7 dB at 2 GHz. It achieves a very flat S/sub 21/ over 50 MHz to 2.5 GHz.

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Available abstract

Key concepts: Direct-coupled amplifier, Current-feedback operational amplifier, Low-noise amplifier, Electronic engineering, Amplifier, Negative feedback amplifier, Linear amplifier, Y-factor