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Base-Emitter Shunt Resistors:
A resistor connected between base and emitter to help
turn off the
transistor.
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Battery
Backup:
A feature of microprocessor supervisory circuits and
some power supplies to switch between a main power
source and a battery.
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Battery
Switchover:
A circuit that switches between the higher of a main
supply and a backup battery.
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Baud Rate:
The number of signal changes per second.
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BCD:
Binary-Coded Decimal. Representation of a number in
which each decimal digit (0-9) is encoded in binary.
In
Packed BCD two BCD numbers one in the lower 4 bits and
one in the upper 4 bits. In Unpacked BCD the lower 4
bits of the number represent the BCD number, and the
rest of the bits are 0.
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Bipolar Junction Transistor:
A Bipolar Junction
Transistor, or BJT, is a
solid-state device in which the current flow between
two terminals (the collector and the emitter) is
controlled by the amount of current that flows through
a third terminal (the base).
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BMP:
Is a bitmapped graphics format is a data file or
structure representing a generally rectangular grid of
pixels, or points of color, on a computer monitor,
paper, or other display medium.
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Boost Converter:
A power supply that steps an input voltage up (boosts
it) to a higher.
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Bootstrap:
Often refers to using the output of a step-up
converter to drive the main power
FET switch,
providing more gate drive than the input can supply
alone. Also refers to using a switched capacitor to
boost the voltage of a node.
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Bridge Rectifier:
A full-wave rectifier with four elements connected as
a bridge circuit with direct voltage obtained from one
pair of opposite junctions when alternating voltage is
applied to the other pair.
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Buck:
A "buck" or "step-down" switch-mode voltage regulator
is one in which the output voltage
is lower than its input voltage. Buck-Boost A
switch-mode
voltage regulator in which output voltage
can be above or below the input voltage. |
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