output noise of a Mos curennt mirror

[joujou]

Hi my friends,

Please, can some one on you explain on me how inM3²=B inM2² if M3 et M2 are two similar Pmos transistors and inM2² and inM3² are the output current noise of M2 and M3. Why it is not inM3²=B² inM2² ??

Thank you in advance

 

[hearter]

noise is not mirrered, but generated in local mos. where did you get this from? text book?

 

[kwkam]

but on the other hand, if the source have the current noise n, then the output current noise ratio is rough in ratio as the current mirror