Nov 30, 2007 #1 J jasonxilion Junior Member level 1 Joined Jan 18, 2007 Messages 17 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,409 hello all recently i am dealing with a vco, i paste it on the web, can u see? it is a delay cell, vc is the contral voltage of the vco. i think most of u are familiar with this kind of vco. my QUESTION is : why the gate of MNC be connected to vdd, to operate in triode region? a paper says that it allows the full amplitude of oscillated signal within a wide range. but i don't know why. anyone can tell me why? and more, what the effect of the MNC to the phase noise of vco?
hello all recently i am dealing with a vco, i paste it on the web, can u see? it is a delay cell, vc is the contral voltage of the vco. i think most of u are familiar with this kind of vco. my QUESTION is : why the gate of MNC be connected to vdd, to operate in triode region? a paper says that it allows the full amplitude of oscillated signal within a wide range. but i don't know why. anyone can tell me why? and more, what the effect of the MNC to the phase noise of vco?
Apr 22, 2008 #2 AdvaRes Advanced Member level 4 Joined Feb 14, 2008 Messages 1,163 Helped 113 Reputation 220 Reaction score 51 Trophy points 1,328 Location At home Activity points 7,442 Please upload the paper from which you get that delay cell. Maybe after ater analysing it I can help you.
Please upload the paper from which you get that delay cell. Maybe after ater analysing it I can help you.
Apr 23, 2008 #3 jecyhale Advanced Member level 1 Joined Feb 19, 2008 Messages 401 Helped 54 Reputation 108 Reaction score 8 Trophy points 1,298 Location China Activity points 3,001 I never use this kind of VCO. I think if you remove the MNC, the amplitude range will be larger. Maybe it is good for phase noise. But it works as resistor, how to reduce the noise?
I never use this kind of VCO. I think if you remove the MNC, the amplitude range will be larger. Maybe it is good for phase noise. But it works as resistor, how to reduce the noise?