Pass Transistor Layout. Figure below shows implementation of and function using only nmos pass transistors. As mentioned earlier cmos transmission gates are frequently employed to implement the switches giving this logic circuit form the alternative name transmission gate logic.
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Parameters conventional cmos pass transistor logic 1 width of layout 21 7 μm 434 lambda 11 3 μm 226 lambda 2 height of layout 7 0 μm 140 lambda 5 8 μm 116 lambda 3 surface area of layout 151 9 μm2 65 5 μm2 4 power consumption 12 204 μw 1 381 μw 5 rise delay 0 012 ns 0 005 ns 6 fall delay 0 012 ns 0 004 ns 7 no. In electronics pass transistor logic describes several logic families used in the design of integrated circuits. Circuits layout cmos vlsi design slide 3 a brief history.
This technique uses the complementary properties of nmos and pmos transistors.
Figure below shows implementation of and function using only nmos pass transistors. Vlsi 1 class notes pass transistor logic pull up version how do voltage levels at the output of this gate differ from that of the pass transistor multiplexer in the previous foil. This form of logic utilizes mos transistors in the series path from input to output to pass or block signal transmission it is known as pass transistor logic ptl. 1 well aka substrate tub moat nmos are in pwell pmos are in nwell 2 diffusion aka diff type of diffusion for source drain set by well defines active vs.
