Low Complexity Dual-Mode Pulse Generator Designs

Jin-Fa LIN  Yin-Tsung HWANG  Ming-Hwa SHEU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.7   pp.1812-1815
Publication Date: 2008/07/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.7.1812
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Circuit Theory
pulse generator,  Flip-Flop,  dual mode triggering,  

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Two novel low complexity dual-mode pulse generator designs suitable for FFs with triggering mode control are presented. The proposed designs successfully integrate XOR/OR (AND/XNOR) functions into a unified pass transistor logic (PTL) module to provide control on single- or double-edge operations. The designs use as few as 8 transistors each and ingeniously avoid the signal degradation problem inherent in most PTL circuits. As the only dual-mode designs so far, the proposed designs also outperform rival single-mode designs in both aspects of circuit complexity and power consumption.