Pleeeeez help me to build a TDA7000 Reciever! I'm in trouble
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Pleeeeez help me to build a TDA7000 Reciever! I'm in trouble
Guys!
Please help me in my problem, I'm really in harry and trouble due to my graduaiton project!!!
I need to build high bit rate digital data link using TDA7000 in its Rx end,
I heared that TDA7000 can be modified somehow to allow wide band transmission, but i don't know how,
I thought that the problem is in two main limitations:
- IF stage is narrow band also it works at 455KHz which may disable the desired high bit rate to be achieved..
- AF stage has LPF action
I thought in disabling the internal IF stage by connecting externally another IF amplifier (but with higher BW) from pin 7 to pin 12, but i don't know how much is the impedance of that pins!! Can i do that?
I think that the second problem is easier, I may take demodulated unfiltered output from pin 4 instead of pin 2.. do you agree with me?
Pleeeeeeeeeeeeeeeeez help me fast ..
Any information will be highly appreciated with many thank
You can find TDA7000 Datasheet here:
http://www.semiconductors.philips.com/a ... _CNV_2.pdf
Will anyone help me??
Thanks alot in advance,
Ahmad,
Please help me in my problem, I'm really in harry and trouble due to my graduaiton project!!!
I need to build high bit rate digital data link using TDA7000 in its Rx end,
I heared that TDA7000 can be modified somehow to allow wide band transmission, but i don't know how,
I thought that the problem is in two main limitations:
- IF stage is narrow band also it works at 455KHz which may disable the desired high bit rate to be achieved..
- AF stage has LPF action
I thought in disabling the internal IF stage by connecting externally another IF amplifier (but with higher BW) from pin 7 to pin 12, but i don't know how much is the impedance of that pins!! Can i do that?
I think that the second problem is easier, I may take demodulated unfiltered output from pin 4 instead of pin 2.. do you agree with me?
Pleeeeeeeeeeeeeeeeez help me fast ..
Any information will be highly appreciated with many thank
You can find TDA7000 Datasheet here:
http://www.semiconductors.philips.com/a ... _CNV_2.pdf
Will anyone help me??
Thanks alot in advance,
Ahmad,
"It’s good that we are all so different. It makes life more interesting"
You ideas are bad, it cannot be done that way. You did not really read the datasheet
carefully.
Use another IC.
carefully.
Use another IC.
Best regards,
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Okay, First, Thank you Mr. Administrator, and i want to tell you that i did read the data sheet carefully as well as the application note AN193 many times before i post this post, and i didn't find a solution to my problem, then i asked for help!!!pcs wrote:You ideas are bad, it cannot be done that way. You did not really read the datasheet
carefully.
Use another IC.
I think that I didn't make something wrong even if i didn't read the datasheet, however i did as i said above..
Anyway, thanks again for your reply, but can you kindly suggest another good idea either discrete solution or suggest another suitable IC?
Thanks alot,
Ahmad,
"It’s good that we are all so different. It makes life more interesting"
TDA7000 is a very special design with 75KHz IF frequency, you cannot just change
this to 455KHz or any other IF frequency.
There are a number of ready-made modules sold by all major electronics vendors.
Usually working at 433MHz. This is your best way.
this to 455KHz or any other IF frequency.
There are a number of ready-made modules sold by all major electronics vendors.
Usually working at 433MHz. This is your best way.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Thank you for your immidiate replypcs wrote:TDA7000 is a very special design with 75KHz IF frequency, you cannot just change
this to 455KHz or any other IF frequency.
There are a number of ready-made modules sold by all major electronics vendors.
Usually working at 433MHz. This is your best way.
For the TDA, I don't want to change its IF frequeny, I want to change its IF filter, which will work on the same IF frequency but with higher BW,
For other solution of the 433MHz, Can you kindly name some ICs that i can use for that purpose? Also if you can provide a discrete solution it may be better for me..
Thanks in advance,
Ahmad,
"It’s good that we are all so different. It makes life more interesting"
You cannot change the BW significantly.
I could design a discrete solution, but it would take time and money.
But since this is for your thesis perhaps you should design it to earn the degree.
433 modules are out there, thousands of them:
http://www.google.com/search?hl=en&q=43 ... tx+modules
Google is your friend. Learn to use it.
I could design a discrete solution, but it would take time and money.
But since this is for your thesis perhaps you should design it to earn the degree.
433 modules are out there, thousands of them:
http://www.google.com/search?hl=en&q=43 ... tx+modules
Google is your friend. Learn to use it.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Can't you please share your discrete solution? It will help me.. please do! I am really in trouble, how can I make you believe that?!pcs wrote:You cannot change the BW significantly.
I could design a discrete solution, but it would take time and money.
But since this is for your thesis perhaps you should design it to earn the degree.
433 modules are out there, thousands of them:
http://www.google.com/search?hl=en&q=43 ... tx+modules
Google is your friend. Learn to use it.
"It’s good that we are all so different. It makes life more interesting"
I said I could.
Unfortunately I can't afford to give you a week of my time for nothing.
Unfortunately I can't afford to give you a week of my time for nothing.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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I agree with you in that in fact, You're absolutely right... but...pcs wrote:I said I could.
Unfortunately I can't afford to give you a week of my time for nothing.
But I may really be unable to pay mony for it, because i have no credit card and i wont be able to have one at this time, I'm ashamed indeed to ask you about it again, You're a succeeded man, and i admire you and your site, i discovered it just after reading your post, and saw your amazing topics here, i didn't think that you make advertisements to some of your wonderful projects and products..
I am sorry if i disturbed you, And if you have further help to me, tell me, if you want me to stop posting my boaring posts here, i will..
Thank you,
Ahmad,
Last edited by ahmad_abdulghany on Mon Apr 24, 2006 1:47 am, edited 1 time in total.
"It’s good that we are all so different. It makes life more interesting"
Its best you find a already-finished solution.
I do not have time to develop one for you.
I do not have time to develop one for you.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Earn your degree. What kind of engineer asks other to do his job?
It will be a worthwhile experience, you will thank me one day, maybe.
It will be a worthwhile experience, you will thank me one day, maybe.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128