How to give oscillator bias?

[John_li]

Hi friends,
I am newbie for oscillator design.I do not know what is the difference between amplifier and oscillaotr bias,how to design the bias of oscillator to get more effective and low noise oscillator?Anyone can give me a hand?
Thanks,

 

[vfone]

For lowest phase noise the oscillator shall be biased in equivalent Class-A operation.

 

[LvW]

Hi friends,
I am newbie for oscillator design.I do not know what is the difference between amplifier and oscillaotr bias,how to design the bias of oscillator to get more effective and low noise oscillator?Anyone can give me a hand?
Thanks,

As the first step you should select a circuitry out of the several oscillator alternatives - and then post it.

 

[Abhishekabs]

First of all you need to read Oscillator theory.Also about different classes of operation.
Oscillator is nothing but an amplifier without any Input(except DC).
Oscilltor circuits needs to satisfy Barkhausen criteria.
Refer Microwave transistor amplifiers by Gonzalez.
Also see following links

**broken link removed**
**broken link removed**

 

[kspalla]

In my view there is no difference from the oscillator bias to the amplifier bias as long as they are nearly behave as bias tee.
You might probably worried because of multiple harmonics etc. Just ensure that your bias tee will cover thees range too.

 

[John_li]

Thanks for all of your help,I get it now.