[Amps] Help Please: Power Amplifiers @ 100MHz

Will Matney craxd1 at verizon.net
Fri Mar 24 13:54:00 EST 2006


Manish,

See below;

*********** REPLY SEPARATOR  ***********

On 3/24/06 at 5:51 PM cm215 at greenwich.ac.uk wrote:

>Hello Gents
>
>I am trying to build a 100 - 200 MHz Power Amplifier using a MOSFET
>(Philips 
>BSS83). However when I tried testing the amp, I could not get anything at
>the 
>output. During simulation everything went to plan.
>
>The circuit is really simple with a voltage divider being used to bias the 
>gate. (high input impedance 100k and 45k).
>
>I am also using 100uF capacitors to uncouple and to couple my circuit. Are 
>these values to high? (My calculations show the caps should go short
>circuit 
>which should not cause me any problems)


You mean the coupling caps for RF in and RF out? Or using them as a voltage block? If so, you only need a few pF to achieve this at that frequency I'd say.


>
>Any comments will be welcomed.
>
>Cheers
>Manish
>
>
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