Consider the following illustration in Figure 1 of what we shall see is an oscillator, specifically, a Colpitts oscillator. Figure 1 The Colpitts oscillator where the passive components are arranged ...
where I DSS is the maximum saturation current and V P is the pinch-off voltage. You can model the JFET in this saturation zone in the small-signal regime using an infinite input impedance and a ...
Small inductance changes on the order of 0.01% can easily be sensed over a wide range with a simple circuit connected to a serial port (see the figure). Using a classic Colpitts oscillator interfaced ...