| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系碩士班 === 92 === The purpose of this thesis is to implement active inductor integrated circuits with a very high quality value and a tunable inductance. The active inductor can be extensively used in the application basic modules of front-end transceiver in wireless communication system, such as LNA (Low Noise Amplifier), VCO (Voltage Controlled Oscillator) … etc.
Because of the smaller area, the higher quality factor and the tunable inductance, active inductor exhibits charming characteristics that spiral inductor can’t exceed. The simulation results in the thesis show that a simple cascode active inductor can work at 5.7 GHz with 9.45 mW power consumption. It can deliver a maximum equivalent inductance of 24 nH with a maximum quality-factor of 40. Besides, the effective inductance and quality-factor can be tuned by controlling the bias current.
Using the above active inductor, a common-source low noise amplifier with an active inductor load is developed. The amplifier operates at 5.7 GHz with 11.1dB power gain, -15 dBm , and 4.1dB noise figure in simulation.
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