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A VLSI High-Performance Priority Encoder Using Standard CMOS Library

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2 Author(s)
Abdel-Hafeez, S. ; Jordan Univ. of Sci. & Technol., Irbid ; Harb, S.

A novel high-performance priority encoder design using standard CMOS library cell is proposed. The new encoder design implementation accommodates both high- and low-priority functionalities with scalable design structure through a special prefixing scheme. The prefixing scheme is applied to minimize the entire propagation delay and exploit the shared hardware between the high- and low-priority evaluation logics circuitry. The proposed encoder shows significant improvement in terms of speed, robustness for top-level floor plan routing, and modularity with pattern structure in compared to the existing encoder designs. Simulation results are conducted for different encoder inputs through 0.15-mum TSMC CMOS technology, where 32-bit priority encoder is used as a test vehicle for comparison improvement measurements. The expected results show that the 32-bit encoder is operating at a maximum of 667-MHz operating frequency with total count of 1106 transistors and a maximum power consumption of total 13.8 mW

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:53 ,  Issue: 8 )

Date of Publication:

Aug. 2006

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