The two persons above are the geniuses who gave us two classic oscillator circuits as shown in Figure 1. Figure 1 The two classic oscillators circuits: Colpitts (left) and Clapp (right). However, a ...

Notice the configuration is the familiar common-emitter Pierce oscillator. In Figure 2-4D the circuit is again redrawn, this time with the base selected as ground reference. The result is the familiar ...

Two different categories of oscillator circuits are elucidated, namely the oscillators based on positive feedback and resonant circuit, such as Hartley oscillator, Colpitts oscillator, Wien bridge ...