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තොරතුරු ඉසව්ව - information centre => තාස්සණික විත්ති | tech news => Topic started by: Janath on December 28, 2007, 11:49:50 PM

Title: A Transmitter Part 03
Post by: Janath on December 28, 2007, 11:49:50 PM

Last A Transmitter Part 02 I gave you block diagram of Oscillator combine with Buffer.
In this I add the next part RF PRE DRIVER block diagram.

RF Pre Driver
(http://img403.imageshack.us/img403/4186/rfpredriversg3.jpg)

  Oscillator makes only around 30mW rf power.Its not enough to make powerful radio transmission.Then we have to amplify out put power of the oscillator.We can use FR amplifier to amplify the low power rf signals.But rf amplifiers need some amount of required rf power to drive it.pre diver amplify rf power to drive rf amplifier

Block diagram upto RF per driver
(http://img207.imageshack.us/img207/8118/oscbufdrioe9.jpg)

(http://img293.imageshack.us/img293/1096/dsc00022ue9.jpg)
Photo of what we going to make

Title: Re: A Transmitter Part 03
Post by: Zoro on December 29, 2007, 09:57:47 AM

welcome to FN  8)

ape kastiyata aluth padamak patan aran wage ne  :lol:

tkz 4 it

- Zoro

Title: Re: A Transmitter Part 03
Post by: Aseni on March 15, 2008, 09:52:33 PM

U're Most Welcome 2 FN Janath
This is very useful lesson for everyone. Specially people who are interested in this field. Sorry for delay to come over your thread.
Please continue next part of lessons.
We are waiting for it.
All the Best.

 :arrow:

Title: Re: A Transmitter Part 03
Post by: veejay on April 14, 2009, 10:42:08 AM

Its nice attempt Janak.  pls try to continue it if possible. I built stereo TX having BA1417 but got parts frm online which cost 4000 rs. pls tell the number of the PLL chip of ur design and where it is avialable  locally? - regards