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Simple math question... (Read 2702 times)
Turin
Junior Member
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Posts: 28
Greece
Simple math question...
Mar 02
nd
, 2010, 7:54am
If you need to derive the gain of an differential output in db...
What you need to calculate is
db(out-in) or
db(out)-db(in)
Thanks
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pancho_hideboo
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Re: Simple math question...
Reply #1 -
Mar 2
nd
, 2010, 8:03am
db(out)-db(in)
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loose-electron
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Re: Simple math question...
Reply #2 -
Mar 2
nd
, 2010, 1:31pm
dbm(out) - dbm(in) = dB gain
or
dbV(out) - dbV(in) = dB gain
If you want to be fussy about definition, dB is a ratio, so there is no such thing as "dB" of a singular measurement
Just to nitpick!!
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Jerry Twomey
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sos
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Re: Simple math question...
Reply #3 -
Mar 2
nd
, 2010, 5:42pm
Turin wrote
on Mar 2
nd
, 2010, 7:54am:
If you need to derive the gain of an differential output in db...
What you need to calculate is
db(out-in) or
db(out)-db(in)
Thanks
db(out-in) is not correct.
Correct would be db(out/in). This is equivalent to db(out)-db(in).
Steve
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