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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Keng-Wai Lo Pui-In Mak Martins, R.P. |
| Copyright Year | 2009 |
| Description | Author affiliation: Analog and Mixed-Signal VLSI Laboratory, FST, University of Macau, Macao, China (Keng-Wai Lo; Pui-In Mak; Martins, R.P.) |
| Abstract | Presented is a novel active-balun low noise amplifier (LNA) with forestage-poststage gain controls for VHF/UHF mobile-TV tuners. It consists of two passive attenuators interoperating with an active core to optimize the RF performances under different reception scenarios. The forestage is a MOS-based attenuator configured in a way that, at all attenuation levels, a broadband input impedance match can be obtained. The interstage is a single-to-differential amplifier exploiting a common-source common-gate structure for noise cancellation. The poststage is a capacitor (CAP)-based attenuator, which adjusts the dynamicity of the output signal before driving the mixer. With this forestage-poststage gain controls the system noise figure and linearity can be easily traded at different gain levels. Optimized in a 0.18-µm CMOS process the LNA attains 0.85-dBm IIP3 at a maximum voltage gain of 26 dB, a 37-dB gain range with a 6-dB step size, and an average noise figure of 2.9 dB. The power consumption is 10.8 mW at 1.8 V. |
| Starting Page | 165 |
| Ending Page | 168 |
| File Size | 2483253 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424446681 |
| DOI | 10.1109/PRIMEASIA.2009.5397422 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-01-19 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Radio frequency Attenuators Noise figure Low-noise amplifiers Tuners Broadband amplifiers Radiofrequency amplifiers Attenuation Gain control Impedance |
| Content Type | Text |
| Resource Type | Article |
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