need help in the ring oscillator

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incol

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I am using a differential ring oscillator. The circuit and simulation result are as follows. the bias current is PATA current source, for I need a zero temperature coefficent. But I find my waveform has different amplitude, what is the reason? I can find the reason.
thanks!!
 

Re: need help in my ring oscillator

the circuit
 

could u reduce ur file size of attachment, cause we will lost points before answer ur question, that's a bad trade.
 

Btrend said:
could u reduce ur file size of attachment, cause we will lost points before answer ur question, that's a bad trade.
Click to expand...


oh sorry, but i dont know how to reduce it.
 

use "Winrar" tool for compressing file
 

Are you taking the differential output for the ring oscillator?
 

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