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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
526
3.6 V. So we have to reduce the voltage but not the
current, typically 100 mA for a USB socket, otherwise
the battery will not be charged. The point is that an
ad-hoc circuit is necessary to reduce the voltage, and
to maintain it at a constant value, without reducing
the current. It cannot be made by a simple resistor
voltage divider, otherwise the current will heat up the
resistors rather than charge the battery.
The circuit shown in Figure 15.7 can solve this.
The diodes have a negative temperature coefcient,
that is, their voltage drop decreases increasing the
temperature, typically
)
(
−°2/
mV C
for silicon ...
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Publisher Resources

ISBN: 9781466582026