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|標題:||A fast-locking agile frequency synthesizer for MIMO dual-mode WiFi/WiMAX applications|
|期刊/報告no：:||Analog Integrated Circuits and Signal Processing, Volume 64, Issue 1, Page(s) 69-79.|
|摘要:||In this paper, a wide-range and fast-locking phase-locked loop (PLL) frequency synthesizer using the band selection technique for the agile voltage-controlled oscillator (VCO) is proposed. The minimum time for band selection, discretely tuned by a time-to-voltage converter, can reach four times of the reference period. In addition, a current-enhanced circuit applied to the PLL can make settling behavior faster. The synthesizer is implemented in a 0.13-mu m CMOS process, which provides the range from 4.6 GHz to 5.4 GHz with the phase noise of -106 dBc/Hz at 1-MHz offset. Combining the fast-locking techniques, the lock time of the synthesizer can be less than 13.2 mu s and consume 39 mW from a 1.2-V power supply.|
|Appears in Collections:||電機工程學系所|
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