# week13 - ECE 3150 Spring 2009 Week 13 Recitation Originally...

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ECE 3150 Spring 2009 Week 13 Recitation Originally Lab 5 report will be due, but it is likely to be extended to next Wednesday due to project conflicts with 220/314/476. There will be nothing due for this Friday. Finish the discussions on first-order circuits. The new materials this week will be the inverter, its delay, progressive sizing in a single chain and in a tree (Horowitz estimate). You should review a simple NAND and NOR in full complementary CMOS as well. Inverter statics: Ask why there has to be a self gain | A v | >> 1 in the VTC so that the inverter will work in the digital circuits? (noise margin, signal regeneration, etc.) Work out the clear definition of V OH , V OL , V IH , V IL and V M . Make sure sizing influence on V M is entirely clear. ( 29 ( 29 ( 29 N n P p thn thp DD M thp M DD P p thn M N n L W k L W k r r V V V r V V V V L W k V V L W k ) / ( ) / ( 1 2 2 ' ' 2 ' 2 ' = + + - = - - = - (8.1) For the match-load condition of k p W p /L p = k n W n /L n and V thn = |V thp |, V M = V DD /2 . For stronger NMOS ( k p W p /L p < k n W n /L n or V thn < |V thp |), V M will be smaller than V DD /2 . For stronger PMOS ( k p W p /L p > k n W n /L n or V thn > |V thp |), V M will be larger than V DD /2 . Give the parameters of k n = μ n C ox = 0.4mA/V 2 , k p = p C ox = 0.2mA/V 2 , V An =V Ap =20V, V thn =|V thp | = 0.5V, κ n = p = 0.6, I thn = 1 μ A and I thp = 0.5 μ A.

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## This note was uploaded on 03/26/2010 for the course ECE 3150 taught by Professor Spencer during the Spring '07 term at Cornell University (Engineering School).

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week13 - ECE 3150 Spring 2009 Week 13 Recitation Originally...

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