How can I amplify a 1Vp-p oscillator without destroying it's phase noise?

[ericz]

Hi,

Does anyone here knows how can I amplify a 1Vp-p Oscillator without distroying it's phase noise? The frequency is 40 MHz and the maximum load is 10 KHom 10 Pf

Regards,

 

[biff44]

Re: 40 MHz Oscillator

Amplifiers can be measured for residual phase noise. If you have a critical application, you want an amplifier whose residual phase noise is at least 10 dB better than your oscillator's phase noise at each offset frequency. What is the oscillator phase noise you are trying to preserve?

 

[ericz]

Re: 40 MHz Oscillator

about -120 dBc at 1 KHz.

can you give me a site who implements such circuits?

or any learning material that can be viewed online?

 

[biff44]

Re: 40 MHz Oscillator

Do a search on "residual phase noise". Just about any low noise bipolar silicon amp will meet that. You may have trouble with fet amps.