Aug 23, 2007 #1 S sarveshks2003 Newbie level 6 Joined Aug 1, 2007 Messages 13 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Activity points 1,330 Hi I want to know how to increase CMRR of a telescopic opamp .
Aug 24, 2007 #2 C castrader Member level 1 Joined Jun 8, 2005 Messages 36 Helped 7 Reputation 14 Reaction score 1 Trophy points 1,288 Activity points 1,468 opamp pay attention to the tail current source! Its rds is the most important!
Aug 24, 2007 #3 Hunter_BJUT Member level 2 Joined Dec 7, 2006 Messages 45 Helped 2 Reputation 4 Reaction score 0 Trophy points 1,286 Activity points 1,444 opamp layout matching.
Aug 25, 2007 #4 Y yyliang Member level 2 Joined Aug 26, 2004 Messages 44 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 365 Re: opamp make your input differential pair with big w/l, pay attention to the match of the current mirror, and you also need to reduce the system offset.
Re: opamp make your input differential pair with big w/l, pay attention to the match of the current mirror, and you also need to reduce the system offset.
Aug 25, 2007 #5 V venky442 Newbie level 6 Joined Jun 28, 2007 Messages 12 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,369 Re: opamp CMRR can be increased by maintaining the higher differential gain than c ommon mode gain. for that mismatech between mosfets should be avoided
Re: opamp CMRR can be increased by maintaining the higher differential gain than c ommon mode gain. for that mismatech between mosfets should be avoided
Aug 27, 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 Activity points 1,931 Re: opamp hi all, To increase CMRR make your input differential pair with big w/l, pay attention to the match of the current mirror, and you also need to reduce the system offset. thanx.....[/quote]
Re: opamp hi all, To increase CMRR make your input differential pair with big w/l, pay attention to the match of the current mirror, and you also need to reduce the system offset. thanx.....[/quote]