UHF 20-dBm PA circuit design...
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Posted by on May 16, 2008, 2:56 pm
Please log in for more thread options amplifiers for UHF radio consumer use. I am familiar with designing such PAs for saturated FM, but not for AM modulations. With linear PAs, how can I design them so that each PA will have pretty much the same output power from amp to amp (without tuning each one)? Thank you, -Nick | |||||||||||||||||||
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Posted by on May 16, 2008, 5:28 pm
Please log in for more thread options AGC? | |||||||||||||||||||
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Posted by Frank Raffaeli on May 17, 2008, 11:39 pm
Please log in for more thread options On May 16, 1:56 pm, nick.adam...@yahoo.com wrote:
> I need to design a few low-cost, linear, single stage, 20dBm power
Modules with fixed gain are pretty cheap these days, but if you need
> amplifiers for UHF radio consumer use. I am familiar with designing > such PAs for saturated FM, but not for AM modulations. With linear > PAs, how can I design them so that each PA will have pretty much the > same output power from amp to amp (without tuning each one)? > > Thank you, > > -Nick to use discrete transistors, the gain consistency will depend mostly upon biasing and temperature compensation. What gain consistency do you need? For better linearity and efficiency: Google feed forward amplifier | |||||||||||||||||||
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> amplifiers for UHF radio consumer use. I am familiar with designing
> such PAs for saturated FM, but not for AM modulations. With linear
> PAs, how can I design them so that each PA will have pretty much the
> same output power from amp to amp (without tuning each one)?
>
> Thank you,
>
> -Nick