This paper presents an improved analysis technique which is able to more accurately predict the negative resistance of Colpitts crystal oscillators. The improvement on the negative resistance calculation is attributed to the use of the actual operatin...
This paper presents an improved analysis technique which is able to more accurately predict the negative resistance of Colpitts crystal oscillators. The improvement on the negative resistance calculation is attributed to the use of the actual operating bias condition instead of the initial bias condition which conventional analysis techniques employ to find the element values of a BJT's equivalent-circuit. Computer experiments show that the technique proposed by this work yields better agreements with the SPICE simulation results than conventional ones exhibit.