Aug 24, 2007 #1 R rampat Member level 4 Joined Jun 27, 2007 Messages 69 Helped 4 Reputation 8 Reaction score 1 Trophy points 1,288 Location bangalore Visit site Activity points 1,756 In the following ckt whcih device sets the vds drop across M6..How to reduce the VDS drop across M6..
In the following ckt whcih device sets the vds drop across M6..How to reduce the VDS drop across M6..
Aug 24, 2007 #2 A amarnath Advanced Member level 1 Joined Apr 24, 2003 Messages 402 Helped 26 Reputation 52 Reaction score 7 Trophy points 1,298 Visit site Activity points 3,141 biasing problem the vds if M6 is set by the vgs of M5 which in turn is set by the size of M5.This is a high swing cascode. mostly used as a load in cascode opamps(folded,telescopic etc) amarnath
biasing problem the vds if M6 is set by the vgs of M5 which in turn is set by the size of M5.This is a high swing cascode. mostly used as a load in cascode opamps(folded,telescopic etc) amarnath
Aug 25, 2007 #3 N nxing Advanced Member level 1 Joined May 10, 2004 Messages 421 Helped 25 Reputation 50 Reaction score 10 Trophy points 1,298 Location China Visit site Activity points 2,856 biasing problem I would say that all of the size of M5, M6 and M10 will affect the Vds of M6, actually, these three form a voltage divider, is that correct?
biasing problem I would say that all of the size of M5, M6 and M10 will affect the Vds of M6, actually, these three form a voltage divider, is that correct?
Aug 25, 2007 #4 kenlino Junior Member level 2 Joined Dec 30, 2005 Messages 22 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,283 Visit site Activity points 1,404 biasing problem If you want to reduce the VDS drop across M6,you can reduce the bias "vbp",this way M6 source drop,then the VDS of M6 drop.
biasing problem If you want to reduce the VDS drop across M6,you can reduce the bias "vbp",this way M6 source drop,then the VDS of M6 drop.
Aug 27, 2007 #5 A ambreesh Full Member level 5 Joined Feb 21, 2005 Messages 319 Helped 21 Reputation 42 Reaction score 4 Trophy points 1,298 Visit site Activity points 4,347 Re: biasing problem The current through the leg, would fix the vgs for M5 and also its size. The vpp bias on gate of M6 fixes the drain potential for M5.
Re: biasing problem The current through the leg, would fix the vgs for M5 and also its size. The vpp bias on gate of M6 fixes the drain potential for M5.
Aug 29, 2007 #6 A ameed Advanced Member level 4 Joined Jun 28, 2007 Messages 106 Helped 6 Reputation 12 Reaction score 1 Trophy points 1,298 Location INDIA Visit site Activity points 1,931 Re: biasing problem hi all, if you are setting M5 and M6 you are getting following result. the vds if M6 is set by the vgs of M5 which in turn is set by the size of M5.This is a high swing cascode. mostly used as a load in cascode opamps(folded,telescopic etc) :idea: thanx.....
Re: biasing problem hi all, if you are setting M5 and M6 you are getting following result. the vds if M6 is set by the vgs of M5 which in turn is set by the size of M5.This is a high swing cascode. mostly used as a load in cascode opamps(folded,telescopic etc) :idea: thanx.....