EERF6395 VSS Homework

# EERF6395 VSS Homework - EERF6395 Homework Set VSS Project...

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EERF6395 Homework Set – VSS Project Simulations Note: show all responses in dB or dBm. Unless specified below use the default values in the VSS behavioral models. 1. Create a simple test circuit to observe the spectrum of a single RF tone at f = 2 GHz with P = 10 dBm. (use “complex” tone for the node setting) System used: TONE ID=A1 FRQ={ 2,2.1 } GHz PWR=10 dBm PHS=0 Deg CTRFRQ= SMPFRQ= ZS=_Z0 Ohm T=_TAMB DegK NOISE=Auto PNMASK= PNOISE=No phase noise SPwr: 13.0103 dBm TP ID=TP1 AMP_B ID=A2 GAIN=10 dB P1DB=20 dBm IP3= IP2= MEASREF= OPSAT= NF=3 dB NOISE=Auto RFIFRQ= SPwr: 21.3297 dBm TP ID=TP2 a) observe power spectrum at a test point at the output of the source

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0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Frequency (GHz) -150 -100 -50 0 50 2 GHz 10 dBm DB(PWR_SPEC(TP.TP1,1000,0,10,0,-1,0,-1,1,0,4,0,1,0)) (dBm) Problem1 b) add a “behavioral” amplifier that has 10 dB gain and P 1dB =25 dBm; note spectral response. What is the Pout at this condition? Why isn’t Pout = 20 dBm? . 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Frequency (GHz) Prob1_SourceSpectrum -200 -150 -100 -50 0 50 2 GHz 19.72 dBm 2 GHz 10 dBm DB(PWR_SPEC(TP.TP1,1000,0,10,0,-1,0,-1,1,0,4,0,1,0)) (dBm) Problem1 DB(PWR_SPEC(TP.TP2,1000,0,10,0,-1,0,-1,1,0,4,0,1,0)) (dBm) Problem1
Pout = 19.72 dBm.

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