Hi Sohaib,

Hope Jeri does not mind me jumping in here – my advice is buy a development kit and play with it, read blogs, watch video and challenge yourself. Correct me if I’m wrong but Jeri learned about FPGA on her own, so did I. I have no degree in electronics as much of what I have done I have learnt myself.

It’s going to be hard against people who have a bit of paper – but people with real projects and real experience will stand out. It’s not easy, but it can be done.

Hi  I am under graduate student. I want to grow in the VLSI field but dont have any idea how to proceed forward.... I am working on the SPATRAN 3E in my college... and learned the basics about the kit .... I am programming on the Xilinx Platform... being an new comer please guide me what to do now after going through the basics....  Thanks for the feedback in advance  Ritesh Kumar

Hi Jeri,

I am  working on Xilinx's Virtex-5 FPGA for some applications of Video in Broadcast domain.

Currently want to do simple 2 TS(Transport Stream) multiplexing each containing 2 services(programs) but just getting stuck in PCR restamping,

Thanks,

Sush.

Hey Jeri, I'm a Fine art student at Bournemouth and I am looking into making an installation where there will be video that is triggered by sound/movement within the room. specifically, when there is movement in the room, the video will speed up, and when there is no movement, the video will stop. I have watched your PIR video and was wondering if there was a way I could do this using a similar method?

Thanks, Rhianna

How to design the blade for a shaft inside a horizontal blending machine ? Could you mention the blade design details ?

The blade should help in mixing as well as transferring the content inside the blending machine from one side to the other side(i.e if feed is given at one end

then the content should be discharged at the other end).

More detailed description of CEM3340:

http://curtiselectromusic.com/uploads/CEM_3340-3345_Long.pdf

Hello Frank etc re CEM3340.

This is a precision audio chip with some dificult to emulate features. We can assume that, at the very least, the OP wants to reproduce the performance of the part. The sweep range is quoted as >50000:1 (500k:1 typical), so the control inputs have a working dynamic range of >>16 bits, suggesting that at least a 20 bit adc is required.

Then there is an analogue FM input. The bandwidth of the FM and control inputs is not quoted so would have to be measured.

The outputs include a triangle wave which can only be reasonably simulated by sampling at a rate related to the system (not the waveform) frequency - why -  because it is common to use a low frequency output from a VCO to control something else which may well be sensitive to steps in the output - think in terms of 100kHz samplng rate (at the very least) and a 16 bit DAC.

We haven't even began to look at the maths issues yet - that FM input or the control input will modulate the frequency within 1 cycle so the  whole thing has to be modelled accordingly.

To replicate the behaviour of this chip using ADCs, digital processing and DACs is a seriously non trivial task - to suggest it could be  a "weekend project" is misleading. Sure  you could hack together some kind of VCO like thing, but the OP wants a replacement for a chip he can't buy.

I feel that the reality is that once you go digital with this kind of fucntion it makes more sense to do the whole system digitally - which I guess is why so few analogue music synthesisers are made now (and no cheap ones).

Michael Kellett

dear jeri....

i need your urgent help plz.........

please help me i want to design VGA display controller baesd on fpga.