CSE477 L07 Pass Transistor Logic.1Irwin&Vijay, PSU, 2002 VLSI Digital Circuits Pass Transistor Logic Referensi : Mary Jane Irwin ( ) [Adapted from Rabaey’s Digital Integrated Circuits, ©2002, J. Rabaey et al.]
CSE477 L07 Pass Transistor Logic.2Irwin&Vijay, PSU, 2002 Rangkaian berikut merupakan STATIC CMOS Kelemahan STATIC CMOS: - butuh banyak transistor - Konsumsi daya tidak tetap.
CSE477 L07 Pass Transistor Logic.3Irwin&Vijay, PSU, 2002 Karakteristik Static Complementary CMOS V DD F(In1,In2,…InN) In1 In2 InN In1 In2 InN PUN PDN PUN and PDN are dual logic networks … … High noise margins l V OH and V OL are at V DD and GND, respectively Low output impedance, high input impedance No static power consumption l Never a direct path between V DD and GND in steady state Delay a function of load capacitance and transistor on resistance
CSE477 L07 Pass Transistor Logic.4Irwin&Vijay, PSU, 2002 Contoh lain, Static CMOS Full Adder Circuit B BB BB B B B A A A A A A A A C in !C out !Sum !C out = !C in (!A v !B) v !A !B C out = C in (A v B) v A B !Sum = C out (!A v !B v !C in ) v !A !B !C in Sum = !C out (A v B v C in ) v A B C in
CSE477 L07 Pass Transistor Logic.5Irwin&Vijay, PSU, 2002 Bentuk lain desain IC VLSI NMOS Transistors in Series/Parallel AB XY X = Y if A and B XY A B X = Y if A or B
CSE477 L07 Pass Transistor Logic.6Irwin&Vijay, PSU, 2002 PMOS Transistors in Series/Parallel AB XY X = Y if A and B = A + B XY A B X = Y if A or B = A B
CSE477 L07 Pass Transistor Logic.7Irwin&Vijay, PSU, 2002 Pass Transistor (PT) Logic A B F B 0 A 0 B B F ?
CSE477 L07 Pass Transistor Logic.8Irwin&Vijay, PSU, 2002 Pass Transistor (PT) Logic A B F B 0 A 0 B B = A B F
CSE477 L07 Pass Transistor Logic.9Irwin&Vijay, PSU, 2002 CPL ( Complementary PT Logic ) Diperlukan satu rangkaian / IC yang didalamnya terdapat satu fungsi dan complemen nya dari Fungsi tersebut contoh misalnya ada fungsi OR berarti juga ada NOR, dst
CSE477 L07 Pass Transistor Logic.10Irwin&Vijay, PSU, 2002 Differential / Complementary PT Logic (CPL) A B A B PT Network F A B A B Inverse PT Network F F F F2 ? A A B F1 ? B BB A A B F3 ? B F4 ? BB A A F5 ? F6 ? BB A A
CSE477 L07 Pass Transistor Logic.11Irwin&Vijay, PSU, 2002 Differential / Complementary PT Logic (CPL) A B A B PT Network F A B A B Inverse PT Network F F F F=AB A A B B BB AND/NAND A A B F=A+B B BB OR/NOR A A F=A B BB XOR/XNOR A A
CSE477 L07 Pass Transistor Logic.12Irwin&Vijay, PSU, Input NAND in CPL
CSE477 L07 Pass Transistor Logic.13Irwin&Vijay, PSU, 2002 CPL Full Adder A A BB C in !Sum Sum C out !C out A A B B B BC in
CSE477 L07 Pass Transistor Logic.14Irwin&Vijay, PSU, 2002 CPL Full Adder A A BB C in !Sum Sum C out !C out A A B B B BC in
CSE477 L07 Pass Transistor Logic.15Irwin&Vijay, PSU, 2002 Transmission Gates (TGs) Full swing bidirectional switch controlled by the gate signal C, A = B if C = 1 AB C C A B C C B C = V DD C = GND A = V DD B C = V DD C = GND A = GND Most widely used solution
CSE477 L07 Pass Transistor Logic.16Irwin&Vijay, PSU, 2002 Transmission Gates (TGs) Full swing bidirectional switch controlled by the gate signal C, A = B if C = 1 AB C C A B C C B C = V DD C = GND A = V DD B C = V DD C = GND A = GND Most widely used solution
CSE477 L07 Pass Transistor Logic.17Irwin&Vijay, PSU, 2002 TG Multiplexer GND V DD In 1 In 2 SS SS S S S In 1 F F F = !(In 1 S + In 2 S)
CSE477 L07 Pass Transistor Logic.18Irwin&Vijay, PSU, 2002 Transmission Gate XOR B A A B
CSE477 L07 Pass Transistor Logic.19Irwin&Vijay, PSU, 2002 Transmission Gate XOR B A A B 1 off an inverter B !A 0 on A !B
CSE477 L07 Pass Transistor Logic.20Irwin&Vijay, PSU, 2002 TG Full Adder Sum C out A B C in
CSE477 L07 Pass Transistor Logic.21Irwin&Vijay, PSU, 2002 Transmission Gate Full Adder
CSE477 L07 Pass Transistor Logic.22Irwin&Vijay, PSU, 2002 Tentukan fungsi F1, F2, F3, F4 berikut ini A A B B B F3 F4 A A B B A A B F2 F1 A A B BABA GND V DD B
CSE477 L07 Pass Transistor Logic.23Irwin&Vijay, PSU, 2002 Differential TG Logic (DPL) A A B B B AND/NAND F=A B XOR/XNOR A A B B A A B F=AB A A B BABA GND V DD B