A New 0.4-V 27-dB 3.1-10.6-GHz UWB Low-Noise Amplifier with Dual-Band B and pass Filter
To-Po Wang1, Jai-Yang Syu2
1To-Po Wang, Department of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan.
2Jai-Yang Syu, Department of Electronic Engineering and Graduate Institute of Computer and Communication Engineering, National Taipei University of Technology, Taipei, Taiwan.
Manuscript received on March 10, 2014. | Revised Manuscript Received on March 12, 2014. | Manuscript published on March 18, 2014. | PP: 25-28 | Volume-1, Issue-4, March 2014. | Retrieval Number: D0151031414
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A low-voltage high-gain ultra-wideband (UWB) low-noise amplifier (LNA) with dual-band tunable bandpass filter for interference rejection is proposed in this paper. There are two sections of the proposed multi-band tunable bandpass filter. The first one is designed for 2.4-GHz interference rejection, and the other one is for 5.2-GHz interference blocking. In addition, high-Q active inductors are adopted in each bandpass filter section for improving the interferences rejection. According to the proposed circuit topology, the UWB LNA has been designed in 0.18-m CMOS process. Simulated results confirm the UWB LNA combining the proposed dual-band tunable bandpass filter can effectively achieve high gain of 27 dB, low noise figure of 2.8 dB, low LNA supply voltage of 0.4 V, and total dc power consumption including multi-band tunable bandpass filter of 16.4 mW. In addition, the simulated interference rejections at 2.4 GHz and 5.2 GHz are 46 dB and 29 dB, respectively.
Keywords: Interference rejection, low-noise amplifier (LNA), noise figure, notch filter.