Most of the discussion in this thread falls under Electronics Engineering. Digital Logic is usually a first year course after which students promptly forget about it. That's until they go into VLSI (Very Large Scale Integrated Circuits) design later on, and then they scramble to re-learn it again.

Software Engineering is not just all about programming; you'd be learning about project management, high-level design, algorithm design, formal verification and other deep stuff. I'd say it falls somewhere between Computer Science and IT.

Your adder and subtractor circuit using XOR? (X-ATAU i suppose in BM )

studying electrical and computer control engineering here, can join?

X(K)=sigma(n=0,N-1)[x(n)e^(-j2pnk/N)] for K=0,1,2,... DFT

What that makes me? I'm okay with VHDL, but not okay with VLSI (any scale intergration, plain boring). My U dun haf fabrication, wonder how come ur U can have a foundary..it costs billions..usually, we send it to silterra or agilent for fabrication.

But i cant join u guys punya discussion, i dun like intergration but u guys haf brifgt future since major electronic company here in penang are looking for VLSI/IC designer and testers. Me, repair tv and radio, hehe!

Well my uni's a good beggar so they gets lots of sponsors, and i don't think a tiny scale low tech fab costs billions. That's the stuff intel has to mass produce millions of chips.

what software that can drawing PMOS structure in 3D. Thanks

draw in 3D? not too sure
but i know L-Edit can view all angles of the cross section on any mask layout
http://www.tanner.com/EDA/products/ledit/d...eet/default.htm

Crap, and all i'm doing is learning adders via flip flops and carry adders, lol malu

Just a bump to keep it alive. Currently doing Control Unit, dunno need how long to finish 8-}

Do you have to use gate level verilog or behavioral?

Mine is all gate level. Kmaps all the way
Usually it's not that hard once you do that, you'll notice that you can share a lot of the control logic.

I'm done with my gate level verilog. Next will be moving on to using Cadence tools and transistor level design. I'm so proud of myself, this is the 1st time in my life i'm done with a project 4 full days before it's due (as opposed to the usual 4 minutes)

Damn, I need to use gate level oso, behavioral no syiok

Phew... I'm used to work for dunno how many days for my Final Year Project, so damn tired to be on schedule. Ikan genius man, 4 minutes can finish a project

Hey, send me your CU design, see which part i can leech u (if u dun mind)

edit : still got some headache in implementing Interrupt Request into the CU.

This post has been edited by charge-n-go: Oct 17 2005, 07:16 PM

i'm a EEE student too hehe.. doing yr 2 sem 1 now... already in 4th wk still blur hahaha... currently doing SP, Ctrl, P.Electronics, etc etc

aiyoh... reading this, i feel like 1st year freshie onli....

graduated with a Diploma in Telco. & Computer Engineering
and also a Degree in Electronics and Computing,

but that was like 3++ years ago.... now almost forget everything alredi...

Anyway, I'm now working in the semiconductor manufacturing / assembly industry.. i.e we make the chips u used in those PCBs.

but don't ask about the internals lah... but if u wanna know how we manufacture leadframes, do die attach, wire bonding, molding, solder plate, window dejunk, singulation, testing, etc, etc then ask loh...

Not 4 minutes finish project... i finish it 4 minutes before it's due... big difference

I don't think you can use anything from my design since it's just a basic ALU. with simple functions only (no mul/div). The focus of the class is the layout part which is why they did not make the design part too complex else everyone will die.

Just do a lot of Kmaps for the combinational part of the control unit. Use behavioral 1st to test the functionality of the datapath, and then slowly replace bits of it with gate level stuff. That way you know where to look if something is wrong.

Wow your uni has some sponsors? Pretty cool, I didn't know your uni could just send a design to get it fabricated somewhere else.

As for me, since my uni was the national centre for III-V semiconductors, we pretty much had our own fabrication lab, right from the diamond saw that slices the ingots to MOCVDs till the ion implanters, the full works. And yes, the cost of fabricating our samples costed each student around 700pounds but that is all already included in our fees.

I was always curious about how they soldered those BGA packages like memory onto the PCB. How do you get the solder balls in the center to melt nicely?

You stick em on the board then stuff the whole board into an oven and cook it. Surface tension will pull the part onto the solder pads nicely. Inspect with an X-ray or ultrasound to make sure there aren't any shorts. Like baking a cake (except for the x-ray part ).

yup... the solder balls is already part of the BGA package... just use a reflow oven.

the oven will have a precise control of the temperature ramp and duration. Also it's is done in Nitrogen gas to ensure parts don't oxidize.

How about the rest of the stuff that was soldered onto the board? doesn't the solder melt? Oh, and what kind of temps can a typical computer PCB handle?

anybody majoring in mechatronics engineering?