Crystal controlled oscillator

The most stable and accurate type of oscillator used crystal in feedback circuit to control the frequency.

there are three types of crystal used

• Quartz
• Tourmaline
• Rochelle salt

but Quartz is one of the type of crystal which exhibits property of piezoelectric effect.

A great advantage of crystal oscillator is that it exhibits a very high Q.

crystal oscillator (Parallel resonant tank circuit)