Oct 27, 2005 #1 L lats Full Member level 4 Joined Oct 27, 2005 Messages 216 Helped 13 Reputation 26 Reaction score 6 Trophy points 1,298 Activity points 2,945 nano ampere meter dear friends i want to design an digital ampere meter with following specification: digital nano ammeter ( 1 - 999 nA) pico Ammeter (1-999 pA), i will be using lcd display and 89c51 microcontroller. please any body help me out for how to design it. byee lats
nano ampere meter dear friends i want to design an digital ampere meter with following specification: digital nano ammeter ( 1 - 999 nA) pico Ammeter (1-999 pA), i will be using lcd display and 89c51 microcontroller. please any body help me out for how to design it. byee lats
Oct 27, 2005 #2 VVV Advanced Member level 5 Joined Nov 26, 2004 Messages 1,575 Helped 384 Reputation 768 Reaction score 88 Trophy points 1,328 Activity points 19,971 pico ampere meter I think you should use an analog front-end, followed by and A/D. Take a look at appnote AN-242 from National. You can probably adapt circuits of figures 11, 12, or 14. Use their output to drive the A/D. www.national.com/an/AN/AN-242.pdf#page=6
pico ampere meter I think you should use an analog front-end, followed by and A/D. Take a look at appnote AN-242 from National. You can probably adapt circuits of figures 11, 12, or 14. Use their output to drive the A/D. www.national.com/an/AN/AN-242.pdf#page=6