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Principles of Analog Electronics
book

Principles of Analog Electronics

by Giovanni Saggio
January 2014
Intermediate to advanced content levelIntermediate to advanced
567 pages
23h 13m
English
CRC Press
Content preview from Principles of Analog Electronics
Principles of Analog Electronics
196
loglogPnP
n
()
()
=
log1 0
()
=
So in this way
The gains (or the losses by attenuation) can be summed instead of multiplied.
Negative decibels represent attenuations, positive decibels represent gains.
The measure scale is “compressed” (for example the enormous interval
1 μW100 W is equal to “only” 80 dB).
According to the denition, expressing the gain G in dB,
G
dB
, we get the
following:
If
PP
21
=
0GdB
dB
=
.
If
PP2
21
=
3GdB
dB
=
.
If
(1/2)
21
PP=
3
GdB
dB
=−
.
If
1, 000,000
21
PP=
60
.Gd
B
dB
=
Therefore 0 dB means that the circuit has produced neither gains nor losses on
the signal; 3 dB means that in the output ...
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Publisher Resources

ISBN: 9781466582026