Re: Ferrite Bead 100mA
(1) May i know what's the actual unit reading for ferrite bead, is it on ampere, walt, ohm?
It’s impedance in (ohms) at a given frequency .. sometimes the manufacturer add current rating ..
(2) The circuit they request for Ferrite Bead 100mA. If my Vcc is +5V. Is it i have to choose 50Ohm ferrite bead?
You choose any attenuation you think is suitable for your application, it doesn’t need to be 59ohms, it can be, for example 200ohms ..
(3) What's the advantage for this ferrite bead component?
http://www.sigcon.com/Pubs/edn/ferritebeads.htm
**broken link removed**
(4) Can we put a small 30Ohm ferrite bead in series for every I/O signal, RS232 Tx/Rx signal, uC reset and IC Vcc?
It is not a requirement to use ferrite beads on all lines, you can have them on power supply rails and not on signal inputs, or you can have different components on power rails and different on signal inputs .. I think you’ll have an idea when to use them once you go through the above links ..
(5) If we apply this on RTC Vcc, can it improve the IC performance so that the time will run more accuracy?
No ..
IanP
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