Copyright 2004 by m 12 nmos pmos logic gates pmos

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Copyright  ©  2004 by M   12 NMOS & PMOS LOGIC GATES PMOS LOGIC GATES:  THE  NOR  GATE THERE IS POWER DISSIPATION IN STEADY STATE          IF {H = 1, L = 0} THEN THE CIRCUIT PRODUCES THE NOR GATE X   V  Y f L     L L     H H    L H    H H L L L
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Copyright  ©  2004 by M   13 NMOS & PMOS LOGIC GATES PMOS LOGIC GATES:  THE  AND  GATE THERE IS POWER DISSIPATION IN STEADY STATE IF {H = 1, L = 0} THEN THE CIRCUIT PRODUCES THE AND  GATE X   V  Y f L     L L     H H    L H    H L L L H LOGIC SYMBOL
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Copyright  ©  2004 by M   14 NMOS & PMOS LOGIC GATES PMOS LOGIC GATES:  SUMMARY THERE IS POWER DISSIPATION IN STEADY STATE
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Copyright  ©  2004 by M   15 CMOS LOGIC GATES TO EVOID STEADY STATE POWER DISSIPATION THE PULL-UP DEVICE, USED IN NMOS LOGIC GATES, IS REPLACED BY A PULL-UP  NETWORK BUILT WITH PMOS TRANSISTORS. THE PULL-DOWN DEVICE, USED IN PMOS LOGIC GATES, IS REPLACED BY A PULL- DOWN NETWORK BUILT WITH NMOS TRANSISTORS.   PULL-UP NETWORK (PUN) PULL-DOWN NETWORK (PDN) V DD V f V X V Z
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Copyright  ©  2004 by M   16 CMOS LOGIC GATES CMOS CIRCUIT : NOT GATE V X T 1      T 2 f L ON  OFF H H OFF  ON L V X V f V DD T 1 T 2
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Copyright  ©  2004 by M   17 CMOS LOGIC GATES CMOS  CUIRCUIT V X   V T 1      T 2      T 3    T 4 f L   L L  H H  L H  H ON ON  OFF OFF ON OFF OFF ON OFF ON ON OFF OFF OFF ON ON  H H H L
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Copyright  ©  2004 by M   18 CMOS LOGIC GATES PROCEDURE TO CONSTRUCT CMOS COMPLEX LOGIC  GATES  F. THE  PULL-UP NETWORK  IS CONSTRUCTED WITH  F  USING  ONLY  PMOS  TRANSISTORS. THE POLARITIES OF THE  VARIABLES ARE COMPLEMENTED THE  PULL-DOWN NETWORK  IS CONSTRUCTED WITH   !F    USING ONLY NMOS TRANSISTORS. PUN AND PDN ARE MUTUALLY EXCLUSIVE. THEY CANNOT  BE CONDUCTING AT THE SAME TIME. THE OUTPUT  V f   CANNOT BE HIGH AND LOW SIMULTANEOUSLY. IF BOTH  NETWORKS ARE NOT CONDUCTING, THEN THE OUTPUT IS  SAID TO BE FLOWTING OR PESENTING HIGH IMPIDANCE. THE  POLARITY OF THE INPUT VARIABLES IS THE SAME FOR  BOTH NETWORKS.
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Copyright  ©  2004 by M   19 CMOS LOGIC GATES GENERAL STRUCTURE OF A CMOS COMPLEX LOGIC GATE  CIRCUIT  F. PULL-UP NETWORK : SYNTHESIZE F COMPLEMENTING THE POLARITY OF THE VARIABLES. THESE ARE INPUTS TO PMOS TRANSISTORS PULL-DOWN NETWORK : SYNTHESIZE !F WITH THE POLARITY OF THE VARIABLES UNCHANGED. THESE ARE INPUTS TO NMOS TRANSISTORS OUTPUT F INPUT VARIABLES V DD
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Copyright  ©  2004 by M   20 CMOS LOGIC GATES EXAMPLE OF A CMOS COMPLEX LOGIC GATE  CIRCUIT  F.
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