Mar 30, 2010 #1 N nandasit Newbie level 4 Joined Mar 30, 2010 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location bangalore Activity points 1,312 why op-amp (High input impedance) is considered while designing?
Apr 1, 2010 #2 kspalla Advanced Member level 4 Joined Aug 19, 2008 Messages 1,253 Helped 258 Reputation 516 Reaction score 94 Trophy points 1,328 Location Hyderabad, Andhra Pradesh, India Activity points 6,813 the idea is not to load the input signal strength/voltage.
Apr 1, 2010 #3 LvW Advanced Member level 6 Joined May 7, 2008 Messages 5,915 Helped 1,754 Reputation 3,514 Reaction score 1,366 Trophy points 1,393 Location Germany Activity points 40,556 kspalla said: the idea is not to load the input signal strength/voltage. Click to expand... More than that! Only in this case the opamp can be considered to function as a VCVS and - as a consequence - the known set of simple equations is applicable to calculate the gain with feedback.
kspalla said: the idea is not to load the input signal strength/voltage. Click to expand... More than that! Only in this case the opamp can be considered to function as a VCVS and - as a consequence - the known set of simple equations is applicable to calculate the gain with feedback.