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EliteTUM
Group Title
How do I solve Q4 of H8P3  Memory "Time to Charge Capacitance Q2 to VOH"?
I tried using the first order dynamics equation:
VOH = VG2max + (VOLVG2max) * exp(t/TAU)
with TAU = R*CGS
and R = RON + RPU  ROFF
but I get t = 122.669 ps which seems to be wrong.
 one year ago
 one year ago
EliteTUM Group Title
How do I solve Q4 of H8P3  Memory "Time to Charge Capacitance Q2 to VOH"? I tried using the first order dynamics equation: VOH = VG2max + (VOLVG2max) * exp(t/TAU) with TAU = R*CGS and R = RON + RPU  ROFF but I get t = 122.669 ps which seems to be wrong.
 one year ago
 one year ago

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olimpiacaj Group TitleBest ResponseYou've already chosen the best response.0
I did the same and get the same result....
 one year ago

EliteTUM Group TitleBest ResponseYou've already chosen the best response.0
at least no error in my numbers but rather in my formula. I'll take a depper look again by tomorrow.
 one year ago

olimpiacaj Group TitleBest ResponseYou've already chosen the best response.0
if i find de solution e post
 one year ago

rsousa Group TitleBest ResponseYou've already chosen the best response.0
VS=5.0V, VOH=3.5V, VIH=3.0V, VIL=0.9V, VOL=0.5V The gatesource capacitance CGS=3.5fF and VT=1.0V. RON=1900.0Ω, ROFF=105.0MΩ and RPU=12.0kΩ. can you tell me why this is wrong? (3.54)/(0.54) = exp(t/τ) exp(t/τ) = 0.142857142857 t/τ = ln(0.142857142857) = 1.94591014906 t = T * 1.94591014906 R = 1900 + ((12000 * 105000000)/(12000 + 105000000)) = 13898.6287281 = 13.8986287281 kΩ T = RC = 13898.6287281 * 3.5E15 = 4.86452005484e11 t = 4.86452005484e11 * 1.94591014906 = 9.46591894502e11 = 94.6591894502 ps
 one year ago

EliteTUM Group TitleBest ResponseYou've already chosen the best response.0
that is the same calculation as above, just different values. Still, I don't know whats wrong with it.
 one year ago

olimpiacaj Group TitleBest ResponseYou've already chosen the best response.0
I did the same reasoning but with different values and also not getting the correct answer
 one year ago
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