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------+--R3--+----
| |
Z1 R1 R2 Z2
| |
------+------+----
ultravox said:@on1aag, I don't get you attenuation calculation...
I fiddled two equations out: ((R3//75) + R2)//R1 = 40
and ((R1//40 +R2)//R3 = 75.
@xxargs that's very clear to me, thank you!
The reason for this is that I want to connect a 75Ω antenna to a TEA5757 (with 40Ω imput impedance). I don't want to use difficult coils to match the impedance, but now I think 7.25 db is quite a lot. I can also accept the mismatch, but I don't know if this is gonna affect the reception. The fm-receiver is near a digital lines...
ultravox