Use a limiting or post amplifier with CML AC coupled input. Check with Micrel or Maxim. Probably need to do a bit of attenuation using either pi or tee network (or simply use a 20dB pad externally), but I have solved this problem before. You did not specify either jitter or rise/fall time requirements so this is the best answer with info. provided. Alfred P. Neves Applications Engineer TDA Systems, Inc. 503-445-0287 (direct) 503-805-1193 (mobile) Alfred.Neves@xxxxxxxxxxxxxx www.tdasystems.com ----- Original Message ----- From: "Kirti Barpande " <kirti@xxxxxxxxxxxx> To: <si-list@xxxxxxxxxxxxx> Sent: Tuesday, July 22, 2003 9:43 PM Subject: (no subject) > Hello! Everyboby, > I am getting problem in converting a high frequency (around 500MHz) Sine > wave (-ve peak -5.0v and +ve peak +5v) to square wave. Obviously we cann't > use TTL buffers at this frequency. I tried with many TTL to ECL converter > buffers fron ONsemiconductors but I could not get results. Has any one done > such conversion? If so please let me know. Also inform me if you have any > idea about fast comparators working above 500 MHz. > Mrs. Kirti Barpande Phone - 91-731-2488054 > Scientific Officer 'F' Fax - 91-731-2488000 > Controls lab, > Room no.114, ADL Building, > Centre foe Advanced Technology, > Indore,(M.P.),India. Pin 452013 > ------------------------------------------------------------------ > 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