Yeah I can follow the instructions on a circuit and build one no worries, but i'm still a little confused on the theory.
the LC tank circuit, simply an inductor (to store a charge) and a capacitor, am I right in assuming, to get the oscillation going, the capacitor and inductor simply throw back and forth the electrons, like a tank of water sloshing back and forth... right?.
how's a crystal come into the equation? random noise is produced and fed to the crystal and some random noise hopefully matches the frequency of the crystal?
Page Source: http://www.simplecircuitdiagram.com/2010/01/25/jfet-pierce-crystal-oscillator/
ok, so fine, random noise from the Capacitor and inductor is produced, but how exactly does it go from a randomish oscillation to a stable oscillation with the Crystal in the circuit?
in short, how the hell does this circuit actually work - Thanks...
the LC tank circuit, simply an inductor (to store a charge) and a capacitor, am I right in assuming, to get the oscillation going, the capacitor and inductor simply throw back and forth the electrons, like a tank of water sloshing back and forth... right?.
how's a crystal come into the equation? random noise is produced and fed to the crystal and some random noise hopefully matches the frequency of the crystal?
This is a simple JFET pierce crystal oscillator. We can use a wide frequency range of crystal using this circuit without circuit modification. Here is the circuit :
This circuit uses Q, 2N3823, that is maintained thus insuring good stability of frequency because the crystal does not loaded by the JFET. [Source: National Semiconductor Application Note]
Page Source: http://www.simplecircuitdiagram.com/2010/01/25/jfet-pierce-crystal-oscillator/
ok, so fine, random noise from the Capacitor and inductor is produced, but how exactly does it go from a randomish oscillation to a stable oscillation with the Crystal in the circuit?
in short, how the hell does this circuit actually work - Thanks...