Nov 10, 2006 #1 D deepabhargavi Junior Member level 2 Joined Nov 3, 2006 Messages 20 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Activity points 1,419 why opamp does not give high frequency gain?
Nov 10, 2006 #2 safwatonline Advanced Member level 4 Joined Nov 19, 2005 Messages 1,341 Helped 219 Reputation 438 Reaction score 48 Trophy points 1,328 Location EGYPT Activity points 9,038 opamp gain at high frequency caps dominate and the output resistance decrease (of internal OTAs) and hence the gain
opamp gain at high frequency caps dominate and the output resistance decrease (of internal OTAs) and hence the gain
Nov 11, 2006 #3 A amriths04 Full Member level 5 Joined Jul 15, 2006 Messages 263 Helped 23 Reputation 46 Reaction score 9 Trophy points 1,298 Activity points 2,819 Re: opamp gain at high frequencies the gain is less because the unity gain bw product has to be maintained. so as bw increases gain decreases. another reason at high freq cap become short. so resistence decreases so gain decreases. AMRITH.S.
Re: opamp gain at high frequencies the gain is less because the unity gain bw product has to be maintained. so as bw increases gain decreases. another reason at high freq cap become short. so resistence decreases so gain decreases. AMRITH.S.
Nov 23, 2006 #4 S suvendu Full Member level 3 Joined Oct 10, 2004 Messages 167 Helped 16 Reputation 32 Reaction score 3 Trophy points 1,298 Activity points 2,121 opamp gain The gain of an opamp is controlled by resistor and capacitor connected to it.at high frequency gain decreases because of the capacitor.
opamp gain The gain of an opamp is controlled by resistor and capacitor connected to it.at high frequency gain decreases because of the capacitor.
Nov 25, 2006 #5 mdanaie Member level 2 Joined Oct 13, 2004 Messages 43 Helped 5 Reputation 10 Reaction score 0 Trophy points 1,286 Activity points 207 opamp gain at high frequencies the output capacitance of the amplifier decreses the load impedance significantly and we know that gain is equal to Gm. Zout . While Gm value remains constant the value of Zout decreases, hence it fails to proudue a large gain
opamp gain at high frequencies the output capacitance of the amplifier decreses the load impedance significantly and we know that gain is equal to Gm. Zout . While Gm value remains constant the value of Zout decreases, hence it fails to proudue a large gain