digital to analog conversion

[wanjohi]

hi,dad and i we r researching on schematics of converting digital TV signal to analog TV receivers.if any one can help with them,PCB and any other relevant details we'd highly appreciate.

Regards.

 

[rongo024]

Use Digital to analog converter IC. You can use DAC0808. You will get application circuit in the DATASHEET

 

[neddie]

A Digital to ananog chip such as the DAC0808 is not going to work for an aplication like this. Do a search on what a digital television signal consists of. It is not the
same as a analog signal that has mearly gone through a ADC.
This is not a trivial project.

 

[karesz]

Hi,
maybe some "self build" magazines as Elector, Popular Electronis, Cellurar Electronics... has your circuit?
K.

 

[betwixt]

If you are talking about converting broadcast digital signals to analog, forget it. As pointed out already, the digital signal if far more than just a digitized version of the analog one. It will be an encoded stream which also carries program information and quite likely more than one program stream. It will also be encoded as OFDM, QAM, QPSK or another transport system and the actual video will be compressed using MPEG or H264. It's a very complex signal!

The DAC0808 is also far too slow to be able to produce the video bandwidth you require. Ideally, you want a DAC that can produce a signal containing components up to at least 6MHz for standard definition and about 12MHz for HD. The DAC0808 is of no use beyond about 3MHz.

Brian.