Practicals & Theses

List of practicals and theses at the Embedded Computing Systems Group (E191/2)

Details for 4 vs 2 phase Logic Design

A general rule of thumb in asynchronous circuit design says that the 4-phase protocol is used for computation while the 2-phase one is used for communication. The reason is that 4-phase gates are smaller in size while the 2-phase protocol allows higher speed. The question that has however not yet been answered is the actual amount of the deviation. How much bigger are 2-phase gates compared to 4-phase? How much faster are they? This thesis therefore focuses on comparing different 2- and 4-phase implementations analytically and on an FPGA. Based on the achieved results the design of novel and innovative gates might become possible.


Your task is to search for suitable 4-phase and 2-phase logic gate designs, implement them using a hardware description language (VHDL, Verilog) and evaluate run time and area overhead analytically and by using simulations. If possible novel implementations shall be developed which perform better in regard to area/speed compared to the existing implementations.

Required Skills

VU Advanced Digital Design, Asynchronous Logic Design


Dipl.-Ing. Dr.techn. Andreas STEININGER

Univ.Ass. Dipl.-Ing. Dipl.-Ing. BSc Jürgen MAIER (main responsibility)


Praktikum, Diplomarbeit