Abstract

In this research study, an integrated low noise amplifier (LNA) designs are presented. If arbitrary values of source impedance are allowed, optimal noise performance of the LNA is obtained by adjusting the source degeneration inductance.  An LNA integrate a low noise figure, reasonable gain, and stability without oscillation over entire useful frequency range.  Basically LNA used in microwave system like Global Positioning System (GPS). Wireless receiver is one of the applications in the system nowadays. It’s able to detect and amplify incoming low-power signals without adding much noise. The most common solution uses low noise amplifiers (LNAs) as the first stage. In order to design LNAs, noise figure must be minimized and looked at the noise properties of two port devices.

There are many type of technique of low noise amplifier such as current reuse, folded cascade and simultaneous noise and input matching (SNIM). Thus, an integrated low-noise amplifier (LNA) designs with folded cascode technique are presented where it has the ability to meet the specification of return loss expressed from its quality in delivering good input matching. For this project the higher gain, low noise, and matching impedance will be the performance criteria of the LNA.

Folded cascade technique is suitable for low voltage even though has own limitations. One advantage of folded-cascode compared to most single-stage amplifiers is allows a significant decoupling of the output common-mode level from the input common-mode level. Then, this research study can be concluded by doing implementation through hardware, PCBs, simulation and integrated circuit (IC) designed besides look forward for the performance of gain, noise and input and output matching.