Biasing Maneatis load ring oscillator

[strennor]

maneatis load

Hi,

For the biasing of Maneatis type load delay buffer, I think the biasing tail NMOS should be same size as the buffer tail NMOS.
Then the Vbp is equal to the min swing limit, since all the tail current is now in only one branch of the differential buffer.


But it is noted as half.

Why? Anyone can help?

 

[strennor]

maneatis

Hello???

Nobody knows it???

 

[anil.p]

maneatis ring oscillator

can you explain ur problem clearly

 

[Simsima]

oscillator maneatis delay cell

Hey strennor,
can i know from where did u get this sizing?

It's my first time to design a vco & it was recommended to use maneatis delay cell ... & i was searching for a methodology for sizing....

Thanks