MCML Implementation of Gbps De-Multiplexer with Dynamic Power Management. Osman Abdulkarim 21 February 2005. MCML Advantages Disadvantages Topologies Dynamic Power management Multiplexers/De-multiplexers Proposal statement References. MOS Current Mode Logic.
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21 February 2005
Differential pair acts as a switch that steers current based on input signal
∆V = Vdd – IR, Typically 0.3 ~ 0.4 V
Common Mode Rejection
P = Vdd . I
Design Considerations include:
-Load Biasing and sizing
-Diff-pairs and current sink
-Minimum Swing for compete steering
Uses feedback to compensate for threshold variation.
∆V Power Management THMAX: Maximum allowable threshold voltage variation
During evaluation, capacitor acts as a virtual AC ground
-Self timed gates
Research: Accumulate information on MCML, threshold voltage fluctuation theory and its effect on MCL switching speed. Define the problem, the performance requirements, the testing methodology and performance indicators measurement.
Circuit design and simulation
Simulation results recording and analysis. Conclusions and suggestions. Comprehensive report.
 0.18-μm CMOS 10-Gb/s multiplexer/demultiplexer ICs using current mode logic with tolerance to threshold voltage fluctuationTanabe, A.; Umetani, M.; Fujiwara, I.; Ogura, T.; Kataoka, K.; Okihara, M.; Sakuraba,H.;Endoh,T.;Masuoka,F.;Solid-State Circuits, IEEE Journal of ,Volume: 36 , Issue:6, June 001 Pages:988 - 996
 Dynamic current mode logic (DyCML): a new low-power high-performance logic styleAllam, M.W.; Elmasry, M.I.;Solid-State Circuits, IEEE Journal of ,Volume: 36 , Issue: 3 , March 2001 Pages:550 - 558
 Adaptable MOS Current mode logic for use in a multiband RF prescalar
Mark, M.P; Olszweski, D.J; Abdelhalim, K.; MacEachern, L.
Circuits and Systems, 2004. ISCAS’04. Proceedings of the 2004 International Symposium on, Vol 4, Iss., 23-26 May 2004
Pages: IV-329-32 Vol 4
 10 Gb/s silicon bipolar 8:1 multiplexer and 1:8 demultiplexerStout, C.L.; Doernberg, J.;Solid-State Circuits, IEEE Journal of ,Volume: 28 , Issue: 3 , March 1993 Pages:339 - 343