A new concept for quadrature coupling of LC oscillators is introduced and demonstrated on a 5GHz CMOS VCO. It uses injection-locking through common-mode inductive coupling to enforce quadrature. The technique provides quadrature over a wide tuning range without introducing any phase noise- or power consumption increase. The realized VCO is tunable between 4.6GHz and 5.2GHz and measures a phase noise lower than –124dBc/Hz at 1MHz offset over the entire tuning range. The circuit draws 8.75mA from a 2.5V supply.
A low-phase-noise 5GHz quadrature CMOS VCO using common-mode inductive coupling
LEVANTINO, SALVATORE;
2002-01-01
Abstract
A new concept for quadrature coupling of LC oscillators is introduced and demonstrated on a 5GHz CMOS VCO. It uses injection-locking through common-mode inductive coupling to enforce quadrature. The technique provides quadrature over a wide tuning range without introducing any phase noise- or power consumption increase. The realized VCO is tunable between 4.6GHz and 5.2GHz and measures a phase noise lower than –124dBc/Hz at 1MHz offset over the entire tuning range. The circuit draws 8.75mA from a 2.5V supply.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
Gierkink_ESSCIRC2002.pdf
Accesso riservato
:
Altro materiale allegato
Dimensione
1.78 MB
Formato
Adobe PDF
|
1.78 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.