CMOS LC Oscillator output buffer

[tromeros]

lc oscillator buffer

Hello,
I have designed a crosscoupled LC oscillator as shown in the following picture which operates at 1.8GHz, in 3V supply voltage and has a sinusoidal peak to peak voltage swing of 2V. My question concerns the output buffer that follows the oscillator core.
What kind of buffer should I use in order to have a 50 Ohm termination?
Will the large swing voltage affect the shape of the outputs after the buffer?

Thanks for any help!

 

[devrimaksin]

You have to use open drain
differentail pair and connect the drain terminals
directly to load resistors. Of course you will
have attenuation but if you want to measure it
this is how you should do