This looks like a multipole fit from S parameter data. This is just a little 10pF capacitor. I assume you are using it for a crystal oscillator or some such and not for power bypass. Steve. On 5/12/2011 8:49 AM, Rohit MISHRA wrote: > Friends, > Though It may look a silly one but It's really bothering me so thought to get > view from experts. > > I always had an understanding that all real capacitors have a parasitic > inductor(ESL) which will always be in series to capacitor( That's why we call > it Equivalent Series Inductance !!! ) and this inductance comes from lead and > plates of capacitor. > > But today when I downloaded a spice netlist for one murata ceramic capacitor, > I have noticed that It has some inductors in parallel too ( L7& L8 ) > > Can anyone help me to understand how parallel inductor is possible in real > capacitors ?? > Here is the spice netlist for murata capacitor : > > .SUBCKT GRM1882C2A100JA01 Port1 Port2 > C1 Port1 11 1.01e-11 Basic capacitance > L2 11 12 1.23e-10Part of ESL > R3 12 13 1.00e-1Part of ESR > C4 13 14 6.67e-10Frequency shaping branch > R4 13 14 4.78Part of ESR, frequency shaping > L5 14 15 6.26e-11Part of ESL, frequency shaping > R5 14 15 3.54e-1Part of ESR, frequency shaping > C6 15 16 7.50e-13Frequency shaping branch > L6 15 16 3.00e-10Part of ESL, frequency shaping > C7 16 17 3.18e-12Frequency shaping branch > L7 16 17 8.17e-11Part of ESL, frequency shaping > R7 16 17 9.10Part of ESR, frequency shaping > C8 17 Port2 5.89e-12Frequency shaping branch > L8 17 Port2 1.04e-10Part of ESL, frequency shaping > R8 17 Port2 17.4Part of ESR, frequency shaping > R100 Port1 11 1.00e+10Leakage resistance > .ENDS GRM1882C2A100JA01 > > Link of murata, if someone wanna explore it : > > http://ds.murata.com/software/simsurfing/en-us/index.html > > > Best Rgds, > > Rohit Mishra > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > > List technical documents are available at: > http://www.si-list.net > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > -- Steve Weir IPBLOX, LLC 150 N. Center St. #211 Reno, NV 89501 www.ipblox.com (775) 299-4236 Business (866) 675-4630 Toll-free (707) 780-1951 Fax ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.net List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu