• DOI:10.2478/s13531-012-0009-1
• Corpus ID: 109947130

A power efficient bandwidth regulation technique for a low-noise high-gain RF wideband amplifier

@article{Roy2012APE,
  title={A power efficient bandwidth regulation technique for a low-noise high-gain RF wideband amplifier},
  author={Apratim Roy and S. M. Shahriar Rashid},
  journal={Central European Journal of Engineering},
  year={2012},
  volume={2},
  pages={383-391}
}

• A. Roy, S. Rashid
• Published 6 June 2012
• Physics
• Central European Journal of Engineering

In this paper, a single-stage deep sub-micron wideband amplifier (LNA) using a reactive resonance tank and passive port-matching techniques is demonstrated operating in the microwave frequency range (K band). A novel power-efficient bandwidth (BW) regulation technique is proposed by incorporating a small impedance in the resonance tank of the amplifier configuration. It manifests a forward gain in the range of 5.9–10.7 dB covering a message bandwidth of 10.6–6.3 GHz. With regulation, input-output reflection parameters (S11, S22) and noise figure can be manipulated by −12.7 dB, −22.7 dB and 0.36 dB, respectively. Symmetric regulation is achieved for bandwidth and small signal gain with respect to moderate tank impedance (36.5% and −26.8%, respectively) but the effect on noise contribution remains relatively low (increase of 7% from a base value of 2.39 dB). The regulated architecture, when analyzed with 90 nm silicon CMOS process, supports low power (9.1 mW) on-chip communication. The circuit is tested with a number of combinations for tank (drain) impedance to verify the efficiency of the proposed technique and achieves better figures of merit when compared with published literature.