ACWWong
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It is normally the case to boost gm initially before reducing it back to the steady state level, this is to enable robust start up, but low current consumption when fully oscillating. So a circuit which actively (current starves ?) has a very low gm to start with is very strange... can you go into the reason this design choice was made ?
Anyway low temperature is always were one worries about the startup, especially with a dozy crystal.... but i would guess that so long as you have enough negative resistance to overcome the net losses eventually, then the oscillator will EVENTUALLY start. Often depending on your application, EVENTUALLY isn't really good enough...
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