The adoption of dynamic dividers in CMOS phase-locked loops for multigigahertz applications allows to reduce the power consumption substantially without impairing the phase noise and the power supply sensitivity of the phase-locked loop (PLL). A 5-GHz frequency synthesizer integrated in a 0.25-μm CMOS technology demonstrates a total power consumption of 13.5 mW. The frequency divider combines the conventional and the extended true-single-phase-clock logics. The oscillator employs a rail-to-rail topology in order to ensure a proper divider function. This PLL intended for wireless LAN applications can synthesize frequencies between 5.14 and 5.70 GHz in steps of 20 MHz. The reference spurs at 10-MHz offset are as low as -70 dBc and the phase noise is lower than -116 dBc/Hz at 1 MHz over the whole tuning range.
A 13.5-mW 5-GHz Frequency Synthesizer with Dynamic Logic Frequency Divider
LEVANTINO, SALVATORE;SAMORI, CARLO;LACAITA, ANDREA LEONARDO
2004-01-01
Abstract
The adoption of dynamic dividers in CMOS phase-locked loops for multigigahertz applications allows to reduce the power consumption substantially without impairing the phase noise and the power supply sensitivity of the phase-locked loop (PLL). A 5-GHz frequency synthesizer integrated in a 0.25-μm CMOS technology demonstrates a total power consumption of 13.5 mW. The frequency divider combines the conventional and the extended true-single-phase-clock logics. The oscillator employs a rail-to-rail topology in order to ensure a proper divider function. This PLL intended for wireless LAN applications can synthesize frequencies between 5.14 and 5.70 GHz in steps of 20 MHz. The reference spurs at 10-MHz offset are as low as -70 dBc and the phase noise is lower than -116 dBc/Hz at 1 MHz over the whole tuning range.File | Dimensione | Formato | |
---|---|---|---|
Pellerano_JSSC_2004.pdf
Accesso riservato
:
Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione
494.88 kB
Formato
Adobe PDF
|
494.88 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.