Voltage Controlled Oscillator

A voltage controlled oscillator includes an LC-tank circuit, a cross-coupled pair circuit, and a trans-conductance adjusting circuit. The LC-tank circuit provides an inductance and a capacitance. The cross-coupled pair circuit is coupled to the LC-tank circuit and has a first transistor and a second...

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Bibliographische Detailangaben
1. Verfasser:	LIU RENIEH
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
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Beschreibung
Zusammenfassung:	A voltage controlled oscillator includes an LC-tank circuit, a cross-coupled pair circuit, and a trans-conductance adjusting circuit. The LC-tank circuit provides an inductance and a capacitance. The cross-coupled pair circuit is coupled to the LC-tank circuit and has a first transistor and a second transistor in a cross-coupled manner. The trans-conductance adjusting circuit is utilized for adjusting a trans-conductance value of the voltage controlled oscillator according to a first control signal, which includes a third transistor coupled to the first transistor and a first switch unit, and a forth transistor coupled to the second transistor and the first switch unit. The first control signal is used for controlling whether to turn on the first switch unit so as to adjust the trans-conductance value of the voltage controlled oscillator.