thanks,
what buffer topology you use in your 2.4GHz vco ? I'm using a differential ring vco and the output signal is low in amplitud and sinusoidal that's why I need a buffer.
buffer stage is to convert the output signal from the
VCO core to a rail-to-rail switching signal . This can be achieved by the use of a two-stage buffer.An active current mirror makes the input stage, which serves both as a differential to single-ended converter and an amplifier. second stage the inverter is designed to make the output signal fully rail-to-rail switching.
HI,
if you need some ideas about high speed CML output buffer, i suggest you to read some papers writen Payam Heydari, who has his own web page.
best.
jeff yan