IF receiver

I want to design a IF receiver board for digital predistortion.

RF input  400Mhz~900Mhz, -40dbm~-10dbm

I select following chips

ADL5801         downconvertor mixter

ADF4350         LO

B5239             EPCOS SAW filter, 153.6Mhz center frequency. 40Mhz passband, 12.2db attenuation

AD8375           IF amp

AD9246           ADC

AD9520           ADC CLK, Sample rate = 120Mhz

anybody can tell me how to design the circuit?

similar to CN0140,but saw filter b5239 has more attenuation,so i need two step IF amp?
first before SAW of after? how the select the amp?

Regards

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  • thanks. i have some other question

    attached is my design circuit, can u give me some advice?

    1. for best performance, LO out of ADF4350 need more filter? how to design it?

    2. i don't know how to design the impedance match of ADL5801-> AD8375, AD8375->SAW filter, SAW filter ->  AD8375

    3. how to design a bandpass filter before ADC, center frequency = 153Mhz, 50Mhz passband

Reply
  • thanks. i have some other question

    attached is my design circuit, can u give me some advice?

    1. for best performance, LO out of ADF4350 need more filter? how to design it?

    2. i don't know how to design the impedance match of ADL5801-> AD8375, AD8375->SAW filter, SAW filter ->  AD8375

    3. how to design a bandpass filter before ADC, center frequency = 153Mhz, 50Mhz passband

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