#### fari

Joined Nov 14, 2005
2
how oscillation starts in oscillators
1. is the AC generated at the output of an oscillator is a result of small fluctuation
which are amplified by the transistor or there is any other reason

#### hgmjr

Joined Jan 28, 2005
9,027
Originally posted by fari@Nov 18 2005, 02:11 PM
how oscillation starts in oscillators
1. is the AC generated at the output of an oscillator is a result of small fluctuation
which are amplified by the transistor or there is any other reason
[post=11744]Quoted post[/post]​
Generally it is the initial instabilty that occurs on power up that kick starts an oscillator. Also, the existence of random noise in the presence of high loop gain is another trigger source.

hgmjr

#### italo

Joined Nov 20, 2005
205
Originally posted by hgmjr@Nov 18 2005, 03:05 PM
Generally it is the initial instabilty that occurs on power up that kick starts an oscillator. Also, the existence of random noise in the presence of high loop gain is another trigger source.

hgmjr
[post=11746]Quoted post[/post]​
may i add phase and feedback. And not only oscillators are oscillating it could be a whole system because of as previously explained INSTABILITY. Power supply if designed to cross over 0Db at a sharp slope will oscillate at some higher frequency. just info.