115C_1_ee115c_11

115C_1_ee115c_11 - Voltage Transfer Curve(VTC 1 CMOS I-V...

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1 Voltage Transfer Curve (VTC)
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2 CMOS I-V Surface Plots NMOS IV surface PMOS IV surface Intersection of IV surfaces of NMOS + PMOS devices VTC
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3 I Dn V out V in = 2.5 V = 2 V = 1.5 V = 0 V = 0.5 V = 1 NMOS V V V V V V V V PMOS CMOS Inverter Load Characteristics V in =1 V in =0.8 V in =0.6 V in =0.4 V in V in V in =0.2 V in =0 V in V in V in V in V in V in NMOS PMOS I Dn V out
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4 CMOS Inverter VTC V in 0.2 0.4 0.6 0.8 1.0 NMOS res PMOS off NMOS sat PMOS sat NMOS off PMOS res NMOS sat PMOS res NMOS res PMOS sat 0.2 0.4 0.6 0.8 1.0 V out V in =V out V M
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5 Impact of Skewed P/N Ratio 0 0.5 1 1.5 2 2.5 0 0.5 1 1.5 2 2.5 V in (V) V out (V) Good PMOS Bad NMOS Good NMOS Bad PMOS Nominal
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6 10 0 10 1 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 M V (V) W p /W n 0 2 2 = + DSATp Tp DD M DSATp p DSATn Tn M DSATn n V V V V V k V V V V k Solving for V M yields: r V V V r V V V DSATp Tp DD DSATn Tn M + + + + + = 1 2 2 n satn p satp DSATn n DSATp p W W V k V k r =
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This note was uploaded on 02/09/2011 for the course EE 115C taught by Professor N/a during the Spring '10 term at UCLA.

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115C_1_ee115c_11 - Voltage Transfer Curve(VTC 1 CMOS I-V...

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