Create a schematic of the one-bit adder with topology

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Reference no: EM131454210

Lab Assignment: 1 bit adder design

In this lab you are going to design a 1-bit adder with an architecture of your choice. For all transistors L=30nm and V_DD = 1.05V. For all input signals rise and fall times are 30ps (T_r = T_f = 30ps between 0% and 100% V_DD). Load for the sum output of the adder is going to be a FO4 of inverter with Wn =420nm & Wp =640nm (Do not include inverters in the layout).

Please name your nets as,
Inputs: A, B, Cin Outputs: Cout, S

1) Create a schematic of the 1-bit adder with topology of your choice, use logical efforts to estimate the sizes in order to optimize delays. Please include your hand calculations in the report. (For appropriate sizing of PMOS and NMOS in order to have PUN and PDN having the same drive capability refer to lab-1)

2) Create a testbench in HSPICE and measure A-B to C_OUT, A-B to S and provide plots for the worst cases (i.e. A to C_OUT, B to S). Also measure C_IN to C_OUT and CIN to S and provide plots. Do these measurement for 5 Corners (TT, SS, SF, FS and FF). Include your plots for TT corner for above measurements and report measured values for every corner.

3) Draw the layout for 1-bit adder. Replace your schematic with the layout in the HSPICE testbench and repeat the measurements in (2) again for the same 5 corners. Please include your plots and measurement results as in (2). Also include DRC & LVS pass screens with your layout view.

4) Calculate the Energy - Delay Product (EDP) for 1-bit adder using layout design (Do not include the power of the load inverter). Report your area as well (Area should be measured as the smallest rectangle encapsulating your layout without V_DD and GND taps).

Attachment:- Lab_Template.pdf

Reference no: EM131454210

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