written 7.0 years ago by | • modified 3.2 years ago |
Subject: CMOS VLSI Design
Topic: Single Stage Amplifier
Difficulty: Medium
written 7.0 years ago by | • modified 3.2 years ago |
Subject: CMOS VLSI Design
Topic: Single Stage Amplifier
Difficulty: Medium
written 7.0 years ago by | • modified 7.0 years ago |
Input reffered noise voltage of CS Stage,
we model the thermal and flicker noise of m_1 by 2 current sources.
¯I2n,th=4KT(2/3)gm
¯I2n,1/f=Kgm2COXWLf
Thermal noise of RD by current source,
¯I2n,RD=4KTRD
The output noise voltage per unit BW=
¯V2n,out=(4KT(2/3)gm+KCOXWL1fgm2+4KTRD)R2D -(1)
We have, ¯V2n,in=¯V2n,outA2v
=(4KT(2/3)gm+KCOXWL1fgm2+4KTRD)R2Dgm2R2D
¯V2n,in=4KT(23)1gm+KCOXWL1fgm+4KTRDgm2 -(2)
Eq (1) -> output noise voltage of CS stage.
Eq (2) -> input noise voltage of CS stage.