Current Controlled MOS Current Mode Logic with Auto-Detection of Threshold Voltage Fluctuation

Hyoungjun NA  Tetsuo ENDOH 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E95-C  No.4  pp.617-626
Publication Date: 2012/04/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Solid-State Circuit Design – Architecture, Circuit, Device and Design Methodology)
Category: 
Keyword: 
MCML,  current controlled MCML,  threshold voltage fluctuation,  differential-mode voltage gain,  operation frequency, 

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Summary: 
In this paper, a theoretical analysis of current-controlled (CC-) MOS current mode logic (MCML) is reported. Furthermore, the circuit performance of the CC-MCML with the auto-detection of threshold voltage (Vth) fluctuation is evaluated. The proposed CC-MCML with the auto-detection of Vth fluctuation automatically suppresses the degradation of circuit performance induced by the Vth fluctuations of the transistors automatically, by detecting these fluctuations. When a Vth fluctuation of ± 0.1 V occurs on the circuit, the cutoff frequency of the circuit is increased from 0 Hz to 3.5 GHz by using the proposed CC-MCML with the auto-detection of Vth fluctuation.