LoW Power
2010 12th International Conference on Computer Modelling and Simulation
Comparison of LNA Topologies for WiMAX Applications in a Standard 90-nm
CMOS Process
Michael Angelo G. Lorenzo
Maria Theresa G. de Leon
Electrical and Electronics Engineering Institute
University of the Philippines, Diliman
Quezon City, Philippines mglorenzo1@up.edu.ph Electrical and Electronics Engineering Institute
University of the Philippines, Diliman
Quezon City, Philippines tess@eee.upd.edu.ph The rest of the paper proceeds as follows: Section 2 of this paper presents the topologies of the implemented lownoise amplifiers. The discussion of the circuit design follows in section 3. The simulation results are presented in section 4 followed by the conclusion in section 5.
Abstract— This paper presents the design of low-noise amplifiers intended for WiMAX applications. Three low-noise amplifier topologies are implemented namely: (1) cascoded common-source amplifier, (2) folded cascode amplifier, and (3) shunt feedback amplifier. The amplifiers were implemented in a standard 90-nm CMOS process and were operated with a 1V supply voltage. Low-noise amplifier measurements were taken for parameters such as power gain, noise figure, input matching, output matching, reverse isolation, stability, and linearity. Based on the employed figure-of-merit, the cascoded common-source low-noise amplifier achieved the best performance among the three with a simulated gain of 13.8 dB and noise figure of 1.7 dB, which makes it comparable to previously published works.
II.
Keywords- RF IC Design; Low-noise amplifier; WiMAX;
Wireless communications
I.
A. Cascoded Common Source Amplifier
The most commonly used topology for LNA design today is the cascode amplifier with inductive source degeneration shown in the Fig. 1. This type of cascode amplifier is called the telescopic cascode amplifier since the cascode transistor is the same type as the input
Comparison of LNA Topologies for WiMAX Applications in a Standard 90-nm
CMOS Process
Michael Angelo G. Lorenzo
Maria Theresa G. de Leon
Electrical and Electronics Engineering Institute
University of the Philippines, Diliman
Quezon City, Philippines mglorenzo1@up.edu.ph Electrical and Electronics Engineering Institute
University of the Philippines, Diliman
Quezon City, Philippines tess@eee.upd.edu.ph The rest of the paper proceeds as follows: Section 2 of this paper presents the topologies of the implemented lownoise amplifiers. The discussion of the circuit design follows in section 3. The simulation results are presented in section 4 followed by the conclusion in section 5.
Abstract— This paper presents the design of low-noise amplifiers intended for WiMAX applications. Three low-noise amplifier topologies are implemented namely: (1) cascoded common-source amplifier, (2) folded cascode amplifier, and (3) shunt feedback amplifier. The amplifiers were implemented in a standard 90-nm CMOS process and were operated with a 1V supply voltage. Low-noise amplifier measurements were taken for parameters such as power gain, noise figure, input matching, output matching, reverse isolation, stability, and linearity. Based on the employed figure-of-merit, the cascoded common-source low-noise amplifier achieved the best performance among the three with a simulated gain of 13.8 dB and noise figure of 1.7 dB, which makes it comparable to previously published works.
II.
Keywords- RF IC Design; Low-noise amplifier; WiMAX;
Wireless communications
I.
A. Cascoded Common Source Amplifier
The most commonly used topology for LNA design today is the cascode amplifier with inductive source degeneration shown in the Fig. 1. This type of cascode amplifier is called the telescopic cascode amplifier since the cascode transistor is the same type as the input
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