Abstract

AbstractVarious low-noise amplifier (LNA) topologies are discussed. LNA is the first receiver block in the receiver side whose performance plays an important role for the remaining blocks. Common source topology is the most preferable technique to improve the gain. Resistive feedback is used to stabilize the circuit while common source with inductive load used to match input impedance. Common gate topology used to improve the impedance matching at input side, whereas distributed amplifier topology increases the gain. Source degeneration and distributed amplifier topology are also discussed.KeywordsImpedance matchingLow-noise amplifierFeedbackNoise figure

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