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Starting electronics<br />

filter a circuit which allows signal of certain frequencies to<br />

pass through unaltered, while preventing passage of other<br />

signal frequencies.<br />

forward biased a diode is forward biased when its anode is<br />

at a more positive potential than its cathode.<br />

frequency the number of cycles of a periodic signal in a given<br />

time. Usually frequency is measured in cycles per second, or<br />

Hertz (shortened to Hz).<br />

frequency response curves graphs of a circuit’s gain against<br />

the frequency of the applied a.c. signal.<br />

full-wave rectification rectification of an a.c. voltage to d.c.,<br />

where both half-waves of the a.c. wave are rectified.<br />

half-wave rectification rectification of an a.c. voltage to d.c.,<br />

where only one half of the a.c. wave is rectified.<br />

hertz the usual term for cycles per second.<br />

high-pass filter a circuit which allows signals of frequencies<br />

higher than the corner frequency to pass through unaltered,<br />

while preventing signals of frequencies lower than this from<br />

passing.<br />

hybrid transfer characteristic a graph of collector current<br />

against base-to-emitter voltage (for a transistor in common<br />

emitter mode).<br />

input characteristic a graph of base current against base-toemitter<br />

voltage (for a transistor in common emitter mode).<br />

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