Dear All: We are doing some simulation about operational amplifiers. I have one question about the input of operational amplifiers. If the input impedance of inverting input and non-inverting input are not same, does the operational amplifiers work normally? For example, the resistor between vin- and inverting input of operational amplifiers is 5K ohm and the resistor between vin+ and non-inverting input of operational amplifiers is 50K ohm. Will the operational amplifier work normally? Best Regards Zhangkun 2003.10.08 ------------------------------------------------------------------ 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