pnanda65675
Member level 2
cadence noise analysis
I hav simulated a simple PMOS buffer op-amp in hspice which generated by 3.3V supply & te result i get as below :
gain =25dB
t.output noise=3.58m V/√Hz
equivalent inp. noise = 188.4u V/√Hz
*While i tried te same cct in Cadence(Spectre) n i get te same o/p noise
t. o/p noise =12.87u V²/Hz
equivalent i/p noise =189.725u V/√Hz
eq. o/p noise =3.588m V/√Hz
squared i/p noise=35.9 n V²/Hz
squared o/p noise =12.87u V²/Hz
* But te prb is i cant use te NF command in Direct Plot (Cadence ), can ny1 plz let me knw how 2 use NF application...
* Noise simulation can b done using AC analysis, but do nybody knws how 2 do it in Transient analysis...
I hav simulated a simple PMOS buffer op-amp in hspice which generated by 3.3V supply & te result i get as below :
gain =25dB
t.output noise=3.58m V/√Hz
equivalent inp. noise = 188.4u V/√Hz
*While i tried te same cct in Cadence(Spectre) n i get te same o/p noise
t. o/p noise =12.87u V²/Hz
equivalent i/p noise =189.725u V/√Hz
eq. o/p noise =3.588m V/√Hz
squared i/p noise=35.9 n V²/Hz
squared o/p noise =12.87u V²/Hz
* But te prb is i cant use te NF command in Direct Plot (Cadence ), can ny1 plz let me knw how 2 use NF application...
* Noise simulation can b done using AC analysis, but do nybody knws how 2 do it in Transient analysis...