The standard CMOS technology has revolutionized the transceiver circuits in communication systems.
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The demand for portable high-frequency communication devices established the widespread use of CMOS-technology-based integrated circuits. Major Narrow-Band LNA Designs in CMOS Technology Here in this article, we will review some narrow-band LNA designs. The optimization of the design selected is also important in LNA. There are several configurations of narrow-band LNA design available, so the selection of proper narrow-band LNA is very crucial. The narrow-band LNA is used for amplifying a single frequency or a small band of frequencies with a high voltage gain. Depending on the application, the LNA can be of wide-band or narrow-band. This requirement makes LNA an integral part of the receiver front end. The received signals are usually weak and noisy and they need to be strengthened before applying to the next stage. The performance of an RF receiver is significantly influenced by the Low Noise Amplifier (LNA). The noise performance of the CG configuration is poor compared to the CS configuration. Most of the conventional narrow-band LNA circuits are the Inductive Source Degenerated CS type.ĬG LNA consumes low power and is stable and robust against parasitic elements. This requirement makes LNA an integral part of the receiver front end.īy placing an inductor in the source of CS stage, Inductive Source Degenerated CS configuration is obtained.
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