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TRF37A75: Is TRF37A75 suitable as an FM radio frequency amplifier?

Downey Kim
Expert 2675 points
Part Number: TRF37A75


Hi TI experts,

We want to use RF AMP because our product has poor FM radio reception sensitivity.

FM radio frequency is 75~108Mhz. 

1. Is TRF37A75 suitable as an FM radio frequency amplifier?

2. Does TI have a dedicated RF AMP for FM frequencies?

3. Are there L,R,C values suitable for 75Mhz ~ 108Mhz amplification? (Based on TRF37A75 basic circuit)

Thanks!

Downey Kim. 

  • 0
    TI__Expert 3620 points

    Hi Downey,

    I don't see any issue here from a bandwidth perspective. There are several other design considerations. Are you placing this block right after the antenna? Are you using a local oscillator, phase locked loop, direct sampling? We have integrated multi-channel RF Transceivers, PLLs, VCOs, dedicated integrated analog front end solutions for automotive digital radio, and more. What is the end equipment in your case?

    Best,

    Sam

  • 0 in reply to Sam Burnett
    Expert 2675 points

    Hi Burnett,

    Application is Portable BT SPK. This device has FM radio function.

    We are using BK1080 as FM receiver IC and an external 32.768khz oscillator.

    See the block below.

    Is there any way to increase the reception sensitivity?

    Thanks.

  • 0 in reply to Downey Kim
    TI__Expert 3620 points

    Hi Downey,

    Have you checked for antenna mismatch? What is your antenna interface/matching network?

    Best,
    Sam