WEEK 7 BRIEFING EE1003 Zhang Jianwen. Project diagram 2.
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Transcript of WEEK 7 BRIEFING EE1003 Zhang Jianwen. Project diagram 2.
WEEK 7 BRIEFING
EE1003
Zhang Jianwen
2
PCM encoder
Frame marker
Analogy voice signal
Logic
MUX Laser
Photodiode
All Digital Phase lock
loop
Frame synchronization
PCMdecoder
Project diagram
Decoder timing (short frame)
MCLK, BCLK and FSR have their rising edges aligned.
FSR precedes data frame by one BCLK period.
BCLK falling edges align with the center of respective data bits.
Detection of digital signal
Determine the received data bit at the right moments.
Transmitting signal
Received signal
Decision time
detection
1 0 1 0 1 0 1
1 1 1 0 1 1 1
Detection of digital signal
Generally, we make decision at the center of each received bit signal.
1. Recover the delayed version of the transmit side clock.
2. Make decision at the rising/falling edges of the recovered bclk
1 0 1 0 1 0 1
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Implications to the system design
We need ADPLL to recover BCLK and MCLK
We need frame markers to assist frame synchronization. Generate the frame markers. Switch between frame markers and the
data frames. Identify the frame markers and retrieve FSR
signal. Filter the false FSR.
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Design report
Design report ---10% Follow the template. Due by midnight of your session day on
week 8. Submit a soft copy your report to student
submissions fold in workbin of IVLE. Not more than 10 pages of A4 paper. Font type: Times New Roman, Size 12 at
least.
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Software for schematics
Fritzing from http://fritzing.org/ Free to use electronic design automation
tool. Download from
http://fritzing.org/download/ Functions:
Schematics: describe your design with chip level details.
Breadboard layout: design your breadboard layout based on your schematics.
Creat custom parts. (There are 2 ways to do it.)
http://fritzing.org/learning/tutorials/creating-custom-parts/
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Software for schematics
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Software for schematics
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Week 7
Group/subgroup discussion Design report (Monday midnight next
week) Project session
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Constellations
Midterm: Wed, 4 March, 9:00-11:00, MPSH1B. Bring your writing materials and calculator.
Detailed information from IVLE.
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Laser link
Think about the supporting for the laser pointer and photodiode such that the laser link is reliable.
Negative pole of photodiode is often connected with its cover.
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Develop your project portfolio online Platform: Wiki@nus
http://wiki.nus.edu.sg/dashboard.action https://wiki.nus.edu.sg/display/EE1003/AY+1415+Semester+2+
Home+Page Common space
https://wiki.nus.edu.sg/display/EE1003/AY+1415+Semester+2+Common+Space
Your group space Links will be sent to individual group later.
How it works? You login wiki@nus Access right to your group page will be granted to your group. You prepare your project portfolio on wiki.
Discussion online I will check your progress online and join your discussion Participations will be counted.
Operational Amplifier
Compute the gain. Input impedance = ∞ Voltage difference ≈ 0
+
_R1
R2
GND
x y
012
R
x
R
yx
R
Ry
1
2By KCL