[MERGED] How To Calculate Phase Noise For VCO Using HSPICE RF?

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You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. [SOLVED][MERGED] How to calculate phase noise for VCO using HSPICE RF?

• Thread starter subujohn
• Start date Oct 1, 2012

Status Not open for further replies. S

subujohn

Newbie level 5

Joined Sep 21, 2012 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location India Visit site Activity points 1,355 I have designed a 3-stage VCO with 0.9V power supply with minimum frequency of 500MHz and maximum frequency of 8GHz. I have used the following SPICE commands which I took from a post https://www.edaboard.com/threads/127339/ .HBOSC tones=500e6 nharms=10 PROBENODE=fosc,0,0.45 FSPTS=20,500e6,8e9 .PHASENOISE V(fosc) DEC 10 100 8g METHOD=0 *******Results****************** .print hbosc vm(fosc) vp(fosc) vr(fosc) vi(fosc) .print phasenoise phnoise .probe phasenoise phnoise .probe hbosc v(fosc) fosc is my output node...0.45V is VDD/2 and under FSPTS, I have given the oscillation range, tones=500e6(Just a random value) Is the SPICE code correct for phase noise analysis? Also, how do I analyze the .PRINTPN0 and .PRINTHB0 files? Contents of PRINTHB0 file f0 1.1286416409g HERTZ n0 VM(FOSC) VP(FOSC) VR(FOSC) VI(FOSC) 0.0000000000 0 8.5878128119u 180.0000000000 -8.5878128119u 0.0000000000 1.1286416409g 1 4.1603582153u 0.0000000000 4.1603582153u 0.0000000000 2.2572832818g 2 13.7277055950u 178.5316597593 -13.7231979228u 351.7665069798n 3.3859249227g 3 247.8713431286n -8.8585981500 244.9145853563n -38.1713062929n 4.5145665636g 4 64.2229420993n 160.9003547340 -60.6875293802n 21.0145204472n 5.6432082045g 5 34.6946171945n -164.5487439937 -33.4406654552n -9.2432870880n 6.7718498454g 6 34.3201961151n 152.8069868911 -30.5268571561n 15.6839680422n 7.9004914863g 7 42.4397680505n -13.3088087715 41.2999841208n -9.7696071467n 9.0291331272g 8 8.6330648063n 171.7806931001 -8.5443869418n 1.2342040912n 10.1577747681g 9 8.0793180419n -156.3226513206 -7.3992125853n -3.2445389718n 11.2864164089g 10 6.2554126695n 99.4775928952 -1.0300280034n 6.1700267405n Contents of PRINTPN0 file HERTZ NLP_L(f) 100.0000000000 -21.4145874353 125.8925411794 -22.4065812174 158.4893192461 -23.3562407786 199.5262314969 -24.2669568330 251.1886431510 -25.1471456135 316.2277660168 -26.0097319519 398.1071705535 -26.8701864854 501.1872336273 -27.7409831067 630.9573444802 -28.6253278317 794.3282347243 -29.5156192238 1.0000000000k -30.3977576034 1.2589254118k -31.2577635027 1.5848931925k -32.0878767372 1.9952623150k -32.8915641928 2.5118864315k -33.6875630432 3.1622776602k -34.5091724561 3.9810717055k -35.3786377713 5.0118723363k -36.2679268545 6.3095734448k -37.1227198732 7.9432823472k -37.9150293703 10.0000000000k -38.6469690118 12.5892541179k -39.3309853489 15.8489319246k -39.9821150824 19.9526231497k -40.6234797187 25.1188643151k -41.2803449036 31.6227766017k -41.9633790927 39.8107170553k -42.6711296984 50.1187233627k -43.3916793057 63.0957344480k -44.1181263716 79.4328234724k -44.8733181518 100.0000000000k -45.6942299231 125.8925411794k -46.5759853033 158.4893192461k -47.4628655912 199.5262314969k -48.3133648817 251.1886431510k -49.1367321314 316.2277660168k -49.9692660585 398.1071705535k -50.8430608230 501.1872336273k -51.7658844192 630.9573444802k -52.7312797930 794.3282347243k -53.7380651003 1.0000000000x -54.7930447399 1.2589254118x -55.9013024581 1.5848931925x -57.0471742285 1.9952623150x -58.1950976072 2.5118864315x -59.3185039661 3.1622776602x -60.4121522596 3.9810717055x -61.4839907877 5.0118723363x -62.5459801298 6.3095734448x -63.6087489422 7.9432823472x -64.6799727429 10.0000000000x -65.7674658830 12.5892541179x -66.8794257889 15.8489319246x -68.0107764932 19.9526231497x -69.1419584648 25.1188643151x -70.2604425469 31.6227766017x -71.3678145337 39.8107170553x -72.4695388316 50.1187233627x -73.5624557022 63.0957344480x -74.6269113503 79.4328234724x -75.6265038669 100.0000000000x -76.5151082613 125.8925411794x -77.2477433796 158.4893192461x -77.7908121931 199.5262314969x -78.1267211548 251.1886431510x -78.2488686717 316.2277660168x -78.1470397656 398.1071705535x -77.7852116552 501.1872336273x -77.0673589896 630.9573444802x -75.7659834327 794.3282347243x -73.3114320286 1.0000000000g -67.6863407340 1.2589254118g -67.7604163168 1.5848931925g -75.3641724499 1.9952623150g -79.2305973941 2.5118864315g -81.4967203532 3.1622776602g -82.9941797518 3.9810717055g -84.1035468687 5.0118723363g -85.0335458451 6.3095734448g -85.8892170890 7.9432823472g -86.7212094842 10.0000000000g -87.5516665636 S

subujohn

Newbie level 5

Joined Sep 21, 2012 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location India Visit site Activity points 1,355 HPSICE RF phase noise calculation.. Can anybody provide some solution to this post https://www.edaboard.com/threads/267273/

erikl

Super Moderator

Staff member Joined Sep 9, 2008 Messages 8,108 Helped 2,695 Reputation 5,370 Reaction score 2,308 Trophy points 1,393 Location Germany Visit site Activity points 44,123 Re: HPSICE RF phase noise calculation.. See this HSPICE® User Guide: RF Analysis manual, chap. 7 . S

subujohn

Newbie level 5

Joined Sep 21, 2012 Messages 8 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location India Visit site Activity points 1,355 Re: HPSICE RF phase noise calculation.. Thank you so much erikl, I just read through it --> Problem solved Status Not open for further replies.

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