cmos_cowboy
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Posts: 7
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Hi Peter,
One of the big factors is area. This obviously depends upon your IF frequency, as essentially what you are doing is rectifying and then lowpass filtering. In the analog domain the lowpass can be quite large, and on some chips this was/is done with an external cap (hence costing a pin).
You must also consider what the RSSI signal is used for. If it is used to control a analogue AGC, to switch in/out an amount of gain or to just to record the signal strength.
What accuracy is required? absolute and relative? will it need calibrating?
I hope this helps,
Regards,
Matt.
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