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