02/18/2015 EECS 522/W15 NAGARJUN BHAT
Report
A narrow-band LNA was designed and simulated in this assignment. The design a...
02/18/2015 EECS 522/W15 NAGARJUN BHAT
Component Dimensions/Specs
FET T5 W:48.0um
L:130nm
Nf:5
FET T4 W:48.0um
L:130nm
Nf:5...
02/18/2015 EECS 522/W15 NAGARJUN BHAT
Given below are the plots of S11, S21, Noise Figure and S12 and S22. Note the LNA is...
02/18/2015 EECS 522/W15 NAGARJUN BHAT
Figure 3: Plot of S-parameters and Noise figure post-PEX
02/18/2015 EECS 522/W15 NAGARJUN BHAT
Figure 4: Layout of the simulated LNA
Figure 5: Zoomed in layout
#Note: Most of the ...
02/18/2015 EECS 522/W15 NAGARJUN BHAT
Figure 6: Proof of the design being DRC clean
Figure 7: Proof of design being LVS cl...
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Narrowband_LNA

Published on: Mar 3, 2016
Source: www.slideshare.net


Transcripts - Narrowband_LNA

  • 1. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Report A narrow-band LNA was designed and simulated in this assignment. The design approach used was to first select an apropriate quality factor Qin and thus select the device dimensions. The operating point is then decided using the curves of gm, gd0, α and Cgs/W and ωt with respect to Drain current density to meet the specified Noise figure of the LNA. The transistors were chosen of identical dimensions to ensure better matching. The chosen bias points are: 1. Iden= 80uA/um 2. Gmden=507uS/um 3. W:48.0um, L:130.0nm Figure 1: Schematic of the Narrowband LNA
  • 2. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Component Dimensions/Specs FET T5 W:48.0um L:130nm Nf:5 FET T4 W:48.0um L:130nm Nf:5 Inds I38 (Lg) Dia:300um W:9.2um N=15 Inductance:46.27nH Inds I15 (Ld) Dia:300um W:8um N=10 Inductance:35.74nH Inds Ls Dia:300um W:10.5um N=1 Inductance:702pH Mimcap Cd W:24.0um L:8.5um Capacitance:95.621fF Mimcap Cgs W:8.4um L:8.5um Capacitance:390.5fF Opppcres Rbig W:200nm L:1.6um Resistance: 2KΩ Table 1: Values of all components Parameters in passband (902-928MHz) Schematic (pre PEX with all real inductors and capacitors and opppcres) Post PEX Noise Figure in dB 2.74 4.12 S11 in dB -10 -13 S21 in dB 10.4 10.2 Table 2: Values of all metrics in passband
  • 3. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Given below are the plots of S11, S21, Noise Figure and S12 and S22. Note the LNA is perfectly unilateral. Figure 2: Plot of Noise figure and S-parameters before PEX
  • 4. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Figure 3: Plot of S-parameters and Noise figure post-PEX
  • 5. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Figure 4: Layout of the simulated LNA Figure 5: Zoomed in layout #Note: Most of the routing was done in higher metals (MA, E1) to reduce noise due to parasitics. Also the particular geometry was chosen to achieve low mismatch levels.
  • 6. 02/18/2015 EECS 522/W15 NAGARJUN BHAT Figure 6: Proof of the design being DRC clean Figure 7: Proof of design being LVS clean *The design is LVS and DRC clean!

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