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RF circuit design for for software defined radio

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siyom

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I'm tasked with designing the RF section of a DSP radio, the whole antena RF filter and Amp I can source elsewhere,
Now my question is this,is there a chip I can buy that readily picks up the FM spectrum and then amplifies it?
My supervisor suggested I buy an actual radio and then use that specific RF section.I don't like that idea
any thoughts
 
the FM spectrum
FM is a modulation mode not a frequency.
Do you mean the 88 to 108 Mhz broadcast band?

the RF section of a DSP radio
At what frequency is the DSP to take place?
Is there to be a down conversion to a lower frequency?
Who is designing the mixer and local oscillator?

is there a chip I can buy
Sounds more like a job for a low noise transistor.
What output level (voltage) is required to drive the ADC?

For the filtering, I think that you will need several tuned circuits to give the required response.

JimB
 
FM is a modulation mode not a frequency.
Do you mean the 88 to 108 Mhz broadcast band?

Yes generaly around that range

At what frequency is the DSP to take place?
Is there to be a down conversion to a lower frequency?

yes there will be donwconversion,to around 50KHz a range that the DSP kit can handle

Who is designing the mixer and local oscillator?
I will be doing the designing


Sounds more like a job for a low noise transistor.

Is it?I don't have much experience with RF circuit hence it was suggested that I buy a ready made RF filter/Amp module to avoid having to design those modules(I'm a student by the way)

What output level (voltage) is required to drive the ADC?

For the filtering, I think that you will need several tuned circuits to give the required response.
Can I get those in an IC package that i can just use

JimB
 
Here is a line of radios that use dsp.
upload_2014-9-1_7-48-33.png
 
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