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Pulse Pulse GeneratorGenerator
High Speed Digital Systems LabHigh Speed Digital Systems LabWinter 2007/08Winter 2007/08
Project definitionProject definition
Instructor: Instructor: Yossi HipshYossi Hipsh
Students: Students: Lior Shkolnitsky, Lior Shkolnitsky, Yevgeniy LobanovYevgeniy Lobanov
2Pulse Generator
TopicsTopics
The main goalThe main goal I/O schemeI/O scheme Specifications definitionSpecifications definition Block diagram (preliminary) Block diagram (preliminary) Time table of the projectTime table of the project
3
The main goalThe main goal To build a Programmable Pulse Generator.To build a Programmable Pulse Generator. The Generator will be integrated into an The Generator will be integrated into an
existing lab experiment, that teaches existing lab experiment, that teaches about High Speed Systems Phenomena: about High Speed Systems Phenomena: reflections, skew and jitter. reflections, skew and jitter.
The Generator will create a The Generator will create a deltadelta signal signal (very short pulse) and (very short pulse) and pulsepulse signal into signal into transmission line.transmission line.
This will allow a better way to observe This will allow a better way to observe reflections.reflections.
Pulse Generator
4
I/O schemeI/O scheme
Programmable
Fast Pulse
Module
Power supply
Function selection
Short pulse (delta)
Long pulse (step)
Pulse Generator
5
Specifications definitionSpecifications definitionOUTPUTSOUTPUTS Short pulse width: 0.5 to 1 nSecShort pulse width: 0.5 to 1 nSec Long pulse width: 10 to 13 nSecLong pulse width: 10 to 13 nSec Very fast rising/falling edge: ~130 pSecVery fast rising/falling edge: ~130 pSec Pulses repetition: 0.1-1 Pulses repetition: 0.1-1 µµSec (1-10 MHz)Sec (1-10 MHz) Stable period (low jitter): <10psec peak-to-peakStable period (low jitter): <10psec peak-to-peakINPUTSINPUTS Function selection:Function selection:
Control of the pulse width: 10pSec stepsControl of the pulse width: 10pSec steps 32 fixed pulse widths, changed by switch, to provide 32 fixed pulse widths, changed by switch, to provide
different results for different studentsdifferent results for different students Power supply: +2.5 to +5 VdcPower supply: +2.5 to +5 Vdc
Pulse Generator
6
Block diagram Block diagram (preliminary)(preliminary)
An option: to use a two channel delay unit - NB6L296M.
Splitter
Buffer
Oscillator AND
Controller
Programmable
Delay
Power Supply
Programmable
Delay
Pulse Generator
7
Time table of the projectTime table of the projectTask \ WeekTask \ Week 11 22 33 44 55 66 77 88 99 1010 1111 1212 1313 1414
Exploring the problem Exploring the problem 22-10
Definition presentation Definition presentation 22-11
Block diagram Block diagram consolidation consolidation
Finding suitable Finding suitable components components
Designing the board Designing the board
Design presentation Design presentation 19-12
Ordering components Ordering components and board and board
Writing the booklet Writing the booklet
Designing a test setup Designing a test setup
Building the project Building the project 15-01
Building the test setup Building the test setup
Test and Debug Test and Debug
Final presentationFinal presentation 30-01
Pulse Generator
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Delay Vcc Delay
Incr
emen
t
Rin(D
own)
Rin(U
p)
Rin
RoutVtt diff
eren
tial
T rise
/fall
fmax
# of P
ins
Size
Volt nsec psec KohmKohm Ohm Ohm Volt psec GHz mm x mmtermination
MC10EP195-D 3.3 2.2 -- 12.2 10 75 37.5 50 Vcc-2 yes 110 1.2 32(50 Mhz)
MC100EP196-D 3.3 2.4 -- 12.4 10 75 36.5 50 Vcc yes 120 1.2 32(50 Mhz)
NB6L295M-D 3.3 / 2.5 3.2 -- 9 11 37 50 50 Vcc yes 100 1.5 24 4x4(2 channels) 6.2 -- 17.8 (50 Mhz)AD9501 5 2.5 -- 10000 10Vol=0.5; Voh=2.5
12
AND Vcc Rin(D
own)
Rin(U
p)
RoutVtt diff
eren
tial
T rise
/fall
fmax
Size
Volt Kohm Kohm Ohm Volt psec MHz pins
MC10E104-D 5 50 50 Vcc-2 no 425 700 28
MC10E404-D 5 50 50 Vcc-2 yes 150-400 900 28
MC10EL05-D 5 … 50 Vcc-2 yes 225 tbd 8
MC100LVEP05 3.3 75 37.5 50 Vcc-2 yes 130 3000 82.5
MC10EP05-D 3.3 75 37.5 50 Vcc-2 yes 130 3000 85
13
Fan Out Buffer Vcc Rin(D
own)
Rin(U
p)
Rin
RoutVtt diff
eren
tial
T rise
/fall
fmax
Size Scew
Volt Kohm Kohm Ohm Ohm Volt psec GHz pins psectermination
MC10EP11-D 5 75 37.5 50 Vcc-2 yes 130 3 8 153.3
NB6L11-D 3.3 75 37.5 50 Vcc-2 yes 75 6 8 52.5
NB6L11M-D 3.3 50 50 Vcc yes 70 4 16 32.5
NBSG11-D 3.3 75 36.5 50 50 Vcc-2 yes 30 12 16 62.5
SY10/100EL11V 5 75 yes 225 8 5(MICREL) 3.3SY89311U 5 75 75 yes 120 3 8 5(MICREL) 3.3
2.5SY89835U 2.5 100 100 yes 75 2 8 5(MICREL)MC100ES6011 3.3 75 56 50 Vcc-2 yes 70-220 3 8(MOTOROLA) 2.5IDT 300---
AZ100EL11 5 75 50 Vcc-2 yes 100-350 8 5(ARIZONA MICROTEK)100EL11 5 50 Vcc-2 yes 225 tbd 8 5(FAIRCHILD)100LVEL11 3.3 50 Vcc-2 yes 120-320 1 8 5(FAIRCHILD)