Does a parallel termination work well up to 5G as well? And with "good board material", do you mean any RF/microwave material with low loss tangent? Also, does any one have a good resource for guidelines for PCB design in the GHz range? Thanks. Betty. At 12:40 AM 1/30/2003 -0500, you wrote: >a series term should work up to 5G if you use good board material. > >-----Original Message----- >From: si-list-bounce@xxxxxxxxxxxxx >[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Betty Luk >Sent: Wednesday, January 29, 2003 8:25 PM >To: si-list@xxxxxxxxxxxxx >Subject: [SI-LIST] impedance matching for high freq PCB > > > >Dear SI experts, > >I am working on a project to test high speed optoelectronic circuits >(hopefully up to the 1-3GHz range). I am making a PCB board to drive the >circuit (a CMOS gate). So I am faced with the problem of matching a 50Ohm >line to almost infinite impedance. > >1) Traditional termination schemes using resistors such as parallel and >series termination - up to what frequencies are these methods valid? > >2) if not, what other schemes should be considered? > >Thank you in advance, >Betty > > >------------------------------------------------------------------ >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 archives are viewable at: > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ 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 archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu