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Originally Posted by Dave.W phones are using inductors in place of decoupling capacitor, you can see in all piece (d500, 7250, 6230 fror examples).
i dunno how that works, as inductor does not block the DC like a capacitor does...
any case, to fault find this correct, you really need a good oscilloscope |
Yes inductors used as filters too ( Ex. the cross fading filters inside the loud speackers ) they use the coils as " shouck coils " to reduce the ultra high frequency signals ( high pass filter ) if connected in seires ( at woofers ) and if used with tweeters it is connected in parallel with the tweeter to eleminate the low frequencyes from the tweeters .
also shouck coils used at the Cars motors as an RF ( radio filters ) devices to reduce the RF harmony of the motor from feeding to the radio .