I had in mind a project to design a superhet receiver for US "AM" radio signals (fairly simple, I thought). So I started reading about oscillators, and I found the literature online about common oscillators such as the Hartley, Colpitts, and Clapp Oscillators. I tried simulating some of these myself in LTSpice, but they only worked for certain frequencies, and playing with certain capacitor values succeeded in making the oscillator fail in most situations.
Articles in this forum refer to special capacitor values, and biasing transistors, and other such things. I've heard of transistor biasing, and know it is used to have a signal fit into a transistor's threshold, but how is it used in oscillator design? Is there any book/document that describes the theoretical basis on which oscillators work, or can anyone give me an explanation? Thanks, and sorry for the basic questions.
Articles in this forum refer to special capacitor values, and biasing transistors, and other such things. I've heard of transistor biasing, and know it is used to have a signal fit into a transistor's threshold, but how is it used in oscillator design? Is there any book/document that describes the theoretical basis on which oscillators work, or can anyone give me an explanation? Thanks, and sorry for the basic questions.