Aug 10, 2007 #1 S schwang1970 Member level 2 Joined Mar 11, 2005 Messages 48 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,639 Hi, ALL Did anyone know how to define the Sigma Delta converter's comparator gain and simulation it by Hspice in differential mode? Thank you!
Hi, ALL Did anyone know how to define the Sigma Delta converter's comparator gain and simulation it by Hspice in differential mode? Thank you!
Oct 15, 2007 #2 J jowong1 Junior Member level 1 Joined Dec 14, 2006 Messages 18 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,419 I think it's the same way u define any other gain...you draw a line that defines the input-output relationship and find the slope of that line.
I think it's the same way u define any other gain...you draw a line that defines the input-output relationship and find the slope of that line.
Oct 15, 2007 #3 H hn1 Advanced Member level 4 Joined Oct 28, 2006 Messages 105 Helped 5 Reputation 10 Reaction score 0 Trophy points 1,296 Activity points 1,872 I think after finding the SNR you can find the conversion gain by reducing the noise level in your bandwidth from the signal gain.
I think after finding the SNR you can find the conversion gain by reducing the noise level in your bandwidth from the signal gain.
Dec 31, 2007 #4 Y Youncen Member level 2 Joined Oct 30, 2005 Messages 50 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 1,637 ok,if your circuit comparator outputs diff +3.3 or -3.3 for 1 and-1 then ,the gain is 3.3, so when feedback this to dac, you should take account it on the other hand,in digital would if you see 3.3v for 1 and -3.3v for -1, then 1/3.3 as gain is automatically added jowong1 didn't say clearly ,but the fact is you say how gainy is ,than you can do how gainy is so
ok,if your circuit comparator outputs diff +3.3 or -3.3 for 1 and-1 then ,the gain is 3.3, so when feedback this to dac, you should take account it on the other hand,in digital would if you see 3.3v for 1 and -3.3v for -1, then 1/3.3 as gain is automatically added jowong1 didn't say clearly ,but the fact is you say how gainy is ,than you can do how gainy is so
Dec 31, 2007 #5 R royayeboodan Newbie level 5 Joined Dec 31, 2007 Messages 10 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Location Iran, Tehran Activity points 1,379 in the comparator circuit,use ac in input and run ac analysis.plot output with bode plot. this way is same way for amplifier gain.
in the comparator circuit,use ac in input and run ac analysis.plot output with bode plot. this way is same way for amplifier gain.