quaternion
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I am designing a LDO using umc 0.13.
I have used HGLV transistor as a pass element but the final size exceeds the expected.
So , Which is better to use as pass element is it Low Vth , or native Vth , or regular Vth ?
When I made an error amplifier for the Low Vth pass element ,the output common mode level was high {for proper operation at drop out region} which made restrictions in the design and affected the performance ,so I concluded that a higher Vth transistor is more appropriate and it may have smaller size ??
I want to know your opinion in that issue.
Also as I am not experienced enough in analog design ,I don't know the differences between such devices (HGLV , HGNVT , HG ), Can anyone declare to me these ; such as what is the difference between regular and native Vth , and why they are called High gain rather than high voltage,..,etc.
Thanks in advance.
I have used HGLV transistor as a pass element but the final size exceeds the expected.
So , Which is better to use as pass element is it Low Vth , or native Vth , or regular Vth ?
When I made an error amplifier for the Low Vth pass element ,the output common mode level was high {for proper operation at drop out region} which made restrictions in the design and affected the performance ,so I concluded that a higher Vth transistor is more appropriate and it may have smaller size ??
I want to know your opinion in that issue.
Also as I am not experienced enough in analog design ,I don't know the differences between such devices (HGLV , HGNVT , HG ), Can anyone declare to me these ; such as what is the difference between regular and native Vth , and why they are called High gain rather than high voltage,..,etc.
Thanks in advance.