| Author |
Message |
Antey
Guest
|
 Posted:
Fri Dec 09, 2005 1:03 am Post subject:
wideband TV ampilifiers - question |
|
|
Hello,
As part of my curriculum I have to present wideband
TV amplifier (3 diffrent proposals) and perform set of simulations
for the selected one.
Among the requirements for the circuit, is of course
it's bandwidth, ~40-890 MHz.
I already have one fairly-well performing circuit,
but still I need the other two; I managed to find another one
at http://www.quasarelectronics.com/1084.htm, but
one person who already have bought and assembled it
says it doesn't work good; there are some oscillations
and in order to work properly, even the complete schema included
with the kit has to be modified (transistor -> cascode)...
So here's my question : where could I possibly find
1-2 such schematics, preferably with complete set of
values for all components ?
( those from my textbooks (4) - have been
rejected for beeing "too academic").
Thank you very much for any assistance and help.
Best Regards,
Peter
PS: Where can I possibly find group's FAQ ?
|
|
| Back to top |
|
 |
Mark
Guest
|
| Posted:
Fri Dec 09, 2005 1:27 am Post subject:
Re: wideband TV ampilifiers - question |
|
|
| Quote: |
So here's my question : where could I possibly find
1-2 such schematics, preferably with complete set of
values for all components ?
|
Try the application notes for some MMIC amplifer components or
transistors made by Sierenza , Maxim, MiniCircuits and others...
Mark |
|
| Back to top |
|
|
Antey
Guest
|
| Posted:
Fri Dec 09, 2005 1:35 am Post subject:
Re: wideband TV ampilifiers - question |
|
|
| Quote: | Try the application notes for some MMIC amplifer components or
transistors made by Sierenza , Maxim, MiniCircuits and others...
|
Thank You :) I have actually tired that way, but with minor results
so far... but on the other hand I tried only with Maxim and in very
limited mannner... so I am going there :) Anyway the only circuit
I've managed to find there didn't work well after transfering to
simulator. The problem is that the circuit must be simulated in some old
(legacy, I'd say) version of PSpice (6.3). I'm not a PSpice guru ;) but
I'm quite confident that I can transfer the schematic to the program...
... anyway, the idea seems to be quite promising, and I'll keep looking.
Best Regards,
Peter
Of course, still any answer suggestion etc will be most welcomed.
|
|
| Back to top |
|
|
Guest
|
| Posted:
Fri Dec 09, 2005 1:35 am Post subject:
Re: wideband TV ampilifiers - question |
|
|
take a look at a NEC MC-7831-HA and a BGY887B , Freescale makes some
interesting CATV blocks/Bricks as well.
Steve Roberts |
|
| Back to top |
|
|
Martin Riddle
Guest
|
| Posted:
Fri Dec 09, 2005 1:35 am Post subject:
Re: wideband TV ampilifiers - question |
|
|
National Semi and Analog Devices have Video amps.
One of those 2 do have 1G bandwidth amps.
Cheers
"Antey" <antey@o2.pl> wrote in message news:dna22g$f2r$1@nemesis.news.tpi.pl...
| Quote: | Try the application notes for some MMIC amplifer components or
transistors made by Sierenza , Maxim, MiniCircuits and others...
Thank You :) I have actually tired that way, but with minor results
so far... but on the other hand I tried only with Maxim and in very
limited mannner... so I am going there :) Anyway the only circuit
I've managed to find there didn't work well after transfering to
simulator. The problem is that the circuit must be simulated in some old
(legacy, I'd say) version of PSpice (6.3). I'm not a PSpice guru ;) but
I'm quite confident that I can transfer the schematic to the program...
.. anyway, the idea seems to be quite promising, and I'll keep looking.
Best Regards,
Peter
Of course, still any answer suggestion etc will be most welcomed. |
|
|
| Back to top |
|
|
Mark
Guest
|
| Posted:
Fri Dec 09, 2005 7:38 am Post subject:
Re: wideband TV ampilifiers - question |
|
|
if you are trying to simulate an 800 MHz BW amplifer, you will need an
acurate model for the transistor or IC and you may need to include the
parasitic Ls and Cs in the physical layout.
Mark |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in