[分享] Colpitts Oscillator Tutorial

      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 2-3MHz/V over 1 to 10V ) with an associated phase noise performance of <-100dBc/Hz @ 10KHz. Theory will be given for the design of the reflection am-plifier and high ‘Q’ resonator, together with the relevant CAD simulations to verify the design.