Jan 21, 2008 #1 barath_87 Full Member level 3 Joined Feb 7, 2006 Messages 183 Helped 18 Reputation 36 Reaction score 6 Trophy points 1,298 Location India Activity points 2,361 Flash ADC design... Hi, I have designed comparator for pipelined adc , I would like to build a 6 bit flash ADC using that comparator.So please give some suggestions and materials regarding .... Thank you in advance.
Flash ADC design... Hi, I have designed comparator for pipelined adc , I would like to build a 6 bit flash ADC using that comparator.So please give some suggestions and materials regarding .... Thank you in advance.
Jan 21, 2008 #2 M mickey_melomane Member level 2 Joined Jun 16, 2006 Messages 47 Helped 5 Reputation 10 Reaction score 2 Trophy points 1,288 Location Columbus, OH Activity points 1,571 Flash ADC design... Use 2^6 comparators with different Vrefs... Generate Vrefs using stacked MOS diodes, (Take care that ur current consumption is well under control... The output of all your comparators together forms the "thermometer code output"... Make sure all your comparators have same rise times, so that your output bits appear together... Sidharth
Flash ADC design... Use 2^6 comparators with different Vrefs... Generate Vrefs using stacked MOS diodes, (Take care that ur current consumption is well under control... The output of all your comparators together forms the "thermometer code output"... Make sure all your comparators have same rise times, so that your output bits appear together... Sidharth
Jan 22, 2008 #3 barath_87 Full Member level 3 Joined Feb 7, 2006 Messages 183 Helped 18 Reputation 36 Reaction score 6 Trophy points 1,298 Location India Activity points 2,361 Re: Flash ADC design... mickey_melomane said: Use 2^6 comparators with different Vrefs... Generate Vrefs using stacked MOS diodes, (Take care that ur current consumption is well under control... The output of all your comparators together forms the "thermometer code output"... Make sure all your comparators have same rise times, so that your output bits appear together... Sidharth Click to expand... Thank you but I am stuck up in the thermometer code output to binary conversion can you pls help me in that part....
Re: Flash ADC design... mickey_melomane said: Use 2^6 comparators with different Vrefs... Generate Vrefs using stacked MOS diodes, (Take care that ur current consumption is well under control... The output of all your comparators together forms the "thermometer code output"... Make sure all your comparators have same rise times, so that your output bits appear together... Sidharth Click to expand... Thank you but I am stuck up in the thermometer code output to binary conversion can you pls help me in that part....
Jan 23, 2008 #4 F fly6987 Newbie level 6 Joined Jan 14, 2008 Messages 12 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Activity points 1,331 Flash ADC design... The book "CMOS Integrated Analog-to-Digital and Digital-to-Analog Converters by Rudy J. van de Plassche" is very good! You can find all the answers in it!
Flash ADC design... The book "CMOS Integrated Analog-to-Digital and Digital-to-Analog Converters by Rudy J. van de Plassche" is very good! You can find all the answers in it!
Jan 23, 2008 #5 N naalald Full Member level 4 Joined Dec 2, 2006 Messages 216 Helped 30 Reputation 54 Reaction score 5 Trophy points 1,298 Activity points 2,627 Re: Flash ADC design... Hi, First, try simulink simulation of the ADC. That halps you a lot.
Feb 6, 2008 #6 rfsystem Advanced Member level 3 Joined Feb 25, 2002 Messages 908 Helped 149 Reputation 294 Reaction score 38 Trophy points 1,308 Location Germany Activity points 9,548 Re: Flash ADC design... Be careful!!! Its not 2^6 but either 2^6-1 or 2^6+1 comparators. The second solution gives you a overflow and underflow too.
Re: Flash ADC design... Be careful!!! Its not 2^6 but either 2^6-1 or 2^6+1 comparators. The second solution gives you a overflow and underflow too.
Mar 10, 2008 #7 M muralicrl Full Member level 5 Joined Feb 6, 2008 Messages 286 Helped 53 Reputation 106 Reaction score 19 Trophy points 1,298 Location Bangalore Activity points 2,626 Re: Flash ADC design... Hi, Kindly see the attachment, it may be useful to you, If you need more details, don't hesitate to contact me. Regards, N.Muralidhara CRL-BEL
Re: Flash ADC design... Hi, Kindly see the attachment, it may be useful to you, If you need more details, don't hesitate to contact me. Regards, N.Muralidhara CRL-BEL