Abstract
In this paper, a modified resistive shunt feedback topology is proposed that performs noise cancelation and serves as an opposite polarity non-linearity generator to cancel the distortion produced by the main stage. The proposed topology has a bandwidth similar to a resistive shunt feedback LNA, but with a superior noise figure (NF) and linearity. The proposed wideband LNA is fabricated in 130 nm CMOS technology and occupies an area of 0.5 mm2. Measured results depict 3-dB bandwidth from 50 to 830 MHz. The measured gain and NF at 420 MHz are 17 dB and 2.2 dB, respectively. The high value of the 1/f noise is one of the key problems in low-frequency CMOS designs. The proposed topology also addresses this challenge and a low NF is attained at low frequencies. Measured S11 and S22 are better than −8.9 dB and −8.5 dB, respectively within the 0.05–1 GHz band. The 1-dB compression point is −11.5 dBm at 700 MHz, while the IIP3 is −6.3 dBm. The forward core consumes 14 mW from a 1.8 V supply. This LNA is suitable for VHF and UHF SDR communication receivers.
Original language | English |
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Pages (from-to) | 63-73 |
Number of pages | 11 |
Journal | Integration, the VLSI Journal |
Volume | 60 |
DOIs | |
Publication status | Published - Jan 2018 |
Keywords
- CMOS
- Distortion
- FOM
- Feedback
- LNA
- Linearity
- Noise
- Wideband
ASJC Scopus subject areas
- Software
- Hardware and Architecture
- Electrical and Electronic Engineering