Fet colpits oscillatorFet colpits oscillatorHere is the schematic diagram of the circuit: In this. aldinc. Re: hartley Vs colpitts oscillator . . . . . In another aspect of the invention, the oscillator comprises a Colpitts oscillator. Colpitts oscillator. . 2 shows an FET oscillator circuit, in accordance . . The diagram below shows a typical Colpitts oscillator circuit using an FET. . the same as in the patent drawing, except that the tube is replaced by a J-FET . Crystal Colpitts oscillator... more