Journal ArticleDOI
A Compact Wideband CMOS Low Noise Amplifier With Gain Flatness Enhancement
TLDR
The proposed gain-peaking technique results in better wideband noise canceling and quick gain roll-off outside the desired signal band to reject interference.Abstract:
This paper presents a compact 0.18-?m CMOS wideband gain-flattened low noise amplifier (LNA). The low noise characteristic of the LNA is achieved by the noise canceling technique and the gain flatness is enhanced by the gate-inductive gain-peaking technique. In addition to extending flat-gain bandwidth, the proposed gain-peaking technique results in better wideband noise canceling and quick gain roll-off outside the desired signal band to reject interference. Without using any passive inductor, the core size of the fully-integrated CMOS LNA circuit is only 145 ? m × 247 ? m. The measured gain and noise figure of the CMOS LNA are 16.4 dB and 2.1 dB, respectively. The gain variation of the LNA is ±0.4 dB from 50 to 900 MHz. Operated at 1.8 V, the chip consumes 14.4 mW of power.read more
Citations
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Journal ArticleDOI
Inductorless Wideband CMOS Low-Noise Amplifiers Using Noise-Canceling Technique
Ke-Hou Chen,Shen-Iuan Liu +1 more
TL;DR: Experimental results demonstrate that the first LNA shows the largest bandwidth, and the second LNA has the lowest power consumption among the inductorless wideband LNAs.
Journal ArticleDOI
Wideband LNA Using Active Inductor With Multiple Feed-Forward Noise Reduction Paths
Mohsen Moezzi,M. Sharif Bakhtiar +1 more
TL;DR: In this article, an area-efficient LNA with on-chip input matching circuit utilizing an active inductor is presented, which is implemented based on the gyrator structure and its noise is improved by employing a feed-forward path (FFP).
Journal ArticleDOI
A 0.044-mm 2 0.5-to-7-GHz Resistor-Plus-Source-Follower-Feedback Noise-Cancelling LNA Achieving a Flat NF of 3.3±0.45 dB
TL;DR: A wideband noise-cancelling low-noise amplifier (LNA) combining resistor feedback and source-follower feedback (SFF) is proposed, which facilitates upsizing of the feedback resistor to improve the gain and noise figure (NF), without compromising the input-impedance matching.
Journal ArticleDOI
Wideband and multiband CMOS LNAs
TL;DR: This review infers that future LNAs suitable for SDR must be highly linear and scalable with future technology nodes.
Journal ArticleDOI
Design and Analysis of CMOS LNAs with Transformer Feedback for Wideband Input Matching and Noise Cancellation
TL;DR: This paper presents a new transformer-feedback technique for RF and millimeter-wave low-noise amplifiers (LNAs) that not only achieves wideband input matching but also enables noise cancellation through an auxiliary out-of-phase forward path.
References
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Wide-band CMOS low-noise amplifier exploiting thermal noise canceling
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TL;DR: This paper presents a cognitive radio system, called KNOWS, which includes a new hardware platform and a spectrum-aware Medium Access Control (MAC) protocol, and results show that in most scenarios KNOWS increases the throughput by more than 200% when compared to an IEEE 802.11 based system.
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