| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 92 === In this thesis, we demonstrate a low power synthesizer for global position system (GPS) which operates at 1.57GHz. For low power consumption consideration, we set the supply voltage at 1.5V, and adopt the “Integer-N” type frequency synthesizer to save power. For high integration issue, all circuits are integrated in single chip except the loop filter and the reference oscillator. This chip is fabricated by TSMC 0.25um.
The measurement of power consumption is 14.1mW for 1.5V supply voltage. VCO consumes 6.8mW, frequency divider consumes 6.6mW, charge pump consumes 0.64mW, and phase/frequency detector consumes less than 1mW.
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