May 25, 2005 #1 Y yihsiu Junior Member level 1 Joined Oct 4, 2004 Messages 15 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 134 help!!! two stage opa could someone tell me what 's the problem with my circuit? vdd: 13 volt vss: -13 volt i gave vin+ 14volt pulse and sine signal respectively vin- 13.4 volt i think the currect output waveform should be from 13 volt to -13 volt but for my design the output did not swing and the pulse output signal was around 0 to 12 volt could someone tell me please thank you very much
help!!! two stage opa could someone tell me what 's the problem with my circuit? vdd: 13 volt vss: -13 volt i gave vin+ 14volt pulse and sine signal respectively vin- 13.4 volt i think the currect output waveform should be from 13 volt to -13 volt but for my design the output did not swing and the pulse output signal was around 0 to 12 volt could someone tell me please thank you very much
May 25, 2005 #2 N noiseless Full Member level 3 Joined May 24, 2005 Messages 172 Helped 15 Reputation 30 Reaction score 6 Trophy points 1,298 Activity points 2,495 Re: help!!! two stage opa your miller cap feedback should go the the drain of the input transistor, not source.
Re: help!!! two stage opa your miller cap feedback should go the the drain of the input transistor, not source.
May 27, 2005 #3 Y yihsiu Junior Member level 1 Joined Oct 4, 2004 Messages 15 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 134 Re: help!!! two stage opa Hi noiseless i tried but the output still didn't go to swing
May 27, 2005 #4 S sunking Advanced Member level 3 Joined May 25, 2004 Messages 873 Helped 70 Reputation 140 Reaction score 23 Trophy points 1,298 Activity points 6,283 help!!! two stage opa make sure the bulk connect of nmos is vss
May 27, 2005 #5 F fantaci Member level 3 Joined Sep 28, 2002 Messages 55 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 511 Re: help!!! two stage opa it looks that the bottom of the schematic should be ground, not Vdd