Abstract
PLL is widely used in a variety of frequency synthesis systems. This paper presents a wideband frequency synthesizer method using a passive frequency double and programmable frequency dividers. The wideband frequency synthesizer contains basic PLL, programmable power processing circuitry, frequency multiplying circuit and frequency dividing circuit. The paper finally provide a wideband frequency from 31.25MHz to 8GHz, typical phase noise is −110dBc/Hz@100Hz, −114.dBc/Hz@1kHz, −115dBc/Hz@10kHz, −112dBc/Hz@100kHz, −131.3dBc/Hz@1MHz with all frequency normalized to 1GHz.
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