Colpitts Oscillator TutorialSheet 1 of 10 Colpitts Oscillator Tutorial J P Silver E-mail: john@rfic.co.uk 1 ABSTRACT This paper will describe the design and test of a low noise VHF Colpitts voltage controlled oscillator (VCO), designed to operate at 200MHz (Tuning bandwidth of 23MHz/V over 1 to 10V ) with an associated phase noise performance of