4-bit Grey Code Converter with Counter

• Lincoln Chin

• Dat Tran

• Thao Nguyen

• Tien Huynh

Specifications

Function• Convert from binary to grey

code

• Count from binary 0-15

• Run with 200MHz Clock• Load capacitance of 50fF• Power = • Area = (388 x 245)um^2 =

95060 um^2

Design Flow

Design Converter• Truth Table• K-maps• XOR

4 input converter

4 output converter

Design Counter• Flip Flop• XOR

4 input counter

4 output counter

Flow Chart

Counter

DFFDFF

DFFXOR DFF

XOR

XOR

XOR

Converter

XOR

XOR

XOR

DFF Layout

DFF Timing Delay Fall Time

DFF Timing Delay Rise Time

Converter Schematic

Converter Layout

Converter Test Vectors

Counter Schematic

Counter Layout

Counter Test Vectors

Binary to Grey code Converter Layout

Binary to Grey code Converter Post Extracted Layout

Binary to Grey Code Converter Test Vectors

DFF LVS Counter LVS

Binary to Grey code Converter LVS Grey Code Converter LVS

Conclusion

Our circuit should• Run with a 200M Hz clock• Have a load capacitance of 50fF• Convert from binary to grey code correctly

Our 4-bit grey code converter with converter is functional.