Download powerpoint

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Three-phase electric power wikipedia, lookup

Power factor wikipedia, lookup

Flexible electronics wikipedia, lookup

Ground (electricity) wikipedia, lookup

Mercury-arc valve wikipedia, lookup

Electrical ballast wikipedia, lookup

Pulse-width modulation wikipedia, lookup

Ohm's law wikipedia, lookup

Transistor wikipedia, lookup

Dynamic range compression wikipedia, lookup

Electrification wikipedia, lookup

Stray voltage wikipedia, lookup

Control system wikipedia, lookup

Rectifier wikipedia, lookup

Voltage optimisation wikipedia, lookup

Electronic engineering wikipedia, lookup

Current source wikipedia, lookup

Power inverter wikipedia, lookup

Electric power system wikipedia, lookup

Variable-frequency drive wikipedia, lookup

Electrical substation wikipedia, lookup

Power over Ethernet wikipedia, lookup

Power MOSFET wikipedia, lookup

Resistive opto-isolator wikipedia, lookup

Surge protector wikipedia, lookup

History of electric power transmission wikipedia, lookup

Power engineering wikipedia, lookup

Islanding wikipedia, lookup

Integrated circuit wikipedia, lookup

Power electronics wikipedia, lookup

Mains electricity wikipedia, lookup

Buck converter wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Opto-isolator wikipedia, lookup

Alternating current wikipedia, lookup

CMOS wikipedia, lookup

MCML Implementation of Gbps
De-Multiplexer with Dynamic
Power Management
Osman Abdulkarim
21 February 2005
Dynamic Power management
Proposal statement
MOS Current Mode Logic
Differential pair acts as a switch that steers current based on input signal
Advantages of MCML
∆V = Vdd – IR, Typically 0.3 ~ 0.4 V
Common Mode Rejection
• Differential Signal  No need for Inverters
• Static Power Dissipation
P = Vdd . I
• Hard to design and optimize
Design Considerations include:
-Load Biasing and sizing
-Diff-pairs and current sink
-Minimum Swing for compete steering
Threshold fluctuation tolerant MCML
• Threshold variation is due
to fabrication process
variations. E.g. Gate
length, oxide thickness,
• Threshold fluctuation
tolerant MCML
Uses feedback to
compensate for threshold
∆VTHMAX: Maximum allowable threshold voltage variation
Dynamic CML
• Dynamic current source
using a capacitor.
During evaluation, capacitor acts
as a virtual AC ground
• Cross-connected PFETs
speed up the switching
• Cascading DyCML gates:
-Delayed Clock
-Self timed gates
Dynamic Power Management-AMCML
• Circuit conditions
power consumption
by changing current
based on frequency
of operation.
• Reduce power
dissipation to the
minimum required
for each operation
• De-Multiplexers
convert a serial bit
stream into a parallel
word format.
• Used in serial
• Can be modeled
using shift registers,
switches or D-Latches
2:1 DeMUX
Proposal Statement
• To design a CML Wide Band Gbps 2:1
Multiplexer using Feedback transistors
and an Adaptable current management.
• The results shall be compared to
Conventional CML, with focus on Power
dissipation and speed.
Time Table
• Feb, 16
Project Proposal
• Feb, 16 – Mar, 1
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.
• Mar, 1 – Mar, 25
Circuit design and simulation
• Mar, 25 – April 1
Project Presentation
• April 1 – April 25
Simulation results recording and analysis. Conclusions and suggestions.
Comprehensive report.
[1] 0.18-μm CMOS 10-Gb/s multiplexer/demultiplexer ICs using current mode
logic with tolerance to threshold voltage fluctuation
Tanabe, 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
[2] Dynamic current mode logic (DyCML): a new low-power high-performance
logic style
Allam, M.W.; Elmasry, M.I.;
Solid-State Circuits, IEEE Journal of ,Volume: 36 , Issue: 3 , March 2001
Pages:550 - 558
[3] 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
[4] 10 Gb/s silicon bipolar 8:1 multiplexer and 1:8 demultiplexer
Stout, C.L.; Doernberg, J.;
Solid-State Circuits, IEEE Journal of ,Volume: 28 , Issue: 3 , March 1993
Pages:339 - 343