The two stacked LC-tank dual band voltage controlled oscillator

A dual-band voltage controlled oscillator is provided. This invention essentially includes two-frequency band LC-tank VCOs stacked in series and operates with one single power supply voltage to provide two output frequency bands. A switch control circuit can be used to select either one of the two s...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	CHUANG, YUN-HSUEH, JANG, SHEN-LIAN
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A dual-band voltage controlled oscillator is provided. This invention essentially includes two-frequency band LC-tank VCOs stacked in series and operates with one single power supply voltage to provide two output frequency bands. A switch control circuit can be used to select either one of the two stacked LC-tank VCOs, and it provides an output to the common point of the two stacked LC-tank VCOs. The two-stacked LC oscillators can be separately optimized to obtain good oscillator characteristic as that of a single frequency band LC tank VCO. At the common point a filter can be added in parallel to improve oscillator performance, since it is used by both of the stacked oscillators, it can save chip space.