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A Wideband CMOS Variable-Gain Low-Noise Amplifier for Cable TV Tuners

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2 Author(s)
Lou, S. ; Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol. ; Luong, H.C.

A 54 MHz-880 MHz low-noise variable-gain amplifier (LNA) for use in cable TV tuners is designed in a 0.18-mum CMOS process. An active shunt feedback is used to achieve wideband input matching without degrading the noise figure. Inductive shunt-peaking is employed at the output to extend bandwidth. The LNA gain can be tuned from 10 dB to 22 dB. The amplifier measures a NF of 2.8dB in the high-gain setting, IIP3 of 5.0dBm at low-gain setting and draws a current of 23mA from a 1.8-V supply

Published in:
Asian Solid-State Circuits Conference, 2005

Date of Conference: Nov. 2005

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