Pertemuan 8 Struktur Logik Gerbang CMOS-VLSI Matakuliah : H0362/Very Large Scale Integrated Circuits Tahun : 2005 Versi : versi/01 Pertemuan 8 Struktur Logik Gerbang CMOS-VLSI
Learning Outcomes Pada Akhir pertemuan ini, diharapkan mahasiswa akan dapat menjelaskan struktur logik gerbang CMOS-VLSI.
Mirror circuits are based on series-parallel logic gates, but usually faster and have a more uniform layout A B F 0 0 0 0 1 1 1 0 1 1 1 0 A B F F = A B On device nFET pFET
Mirror Circuits Gnd a b VDD Layout VDD a b a b Rangkaian
Mirror Circuits Rp Cp Cout Rn Cn : time constant r : rise time f : fall time
Struktur umum pseudo nMOS VDD Pull-up Load nFET Logic Array Pull-down + - VSGp f Struktur umum pseudo nMOS p n VOL Pseudo nMOS inverter
Rangkaian CMOS Tri-state Rangkaian Tri-state Data En f En f 0 Z 1 Data Gnd Layout En VDD f Data VDD Data En f Rangkaian CMOS Tri-state Mp Mn M1 M2
Struktur clock gerbang CMOS Clocked CMOS 1 T 2T time Struktur clock gerbang CMOS a f(a, b, c) M1 M2 nFET pFET b c Vout + - Cout VDD Input valid Hi-Z
Clocked CMOS Rangkaian NAND2 Layout VDD Mp M1 a . b Cout M2 a Mn b Gnd Layout Out
Dynamic CMOS LOGIC A dynamic logic gate uses clocking and charge storage properties of MOSFETs to implement logic operations Basic dynamic gate logic VDD Mp a Mn nFET b c d Cout Vout f Precharge Mp ON Mn OFF Evaluate Mp OFF Mn ON T
Contoh rangkaian dynamic logik Dynamic CMOS LOGIC Contoh rangkaian dynamic logik VDD b a Mp c Cout f Mn Vout Layout Gnd
Dual Rail Logic We have been concentrating on single-rail logic Circuits where the value of a variables is eiher a 0 or 1 only. In dual-rail networks, both the variable x and its complement x are used to form the difference fx = (x – x )
Structure of a CVSL logic gate Dual Rail Logic Vr VDD Vl a MP2 MP1 b c Sw1 Sw2 Logic tree f Latch Vr VDD Vl a . b a b AND / NAND Structure of a CVSL logic gate
RESUME Mirror Circuiuts. Pseudo nMOS. Tri-state. Clocked CMOS. Dynamic CMOS Logic. Dual Rail Logic.