Page 20 - NOISE IN SYSTEM COMMUNICATION

INTERNAL NOISE

Internal Noise is the noise which is generated inside the
communication system, within a device or circuit. It is produced

by properly design of receiver circuitry.

2 Shot Noise

Shot noise is caused by the These random arrival of the
random arrival of current carriers because of the random
carriers (holes and electrons) at paths and difference distance of
the output element of an travels.

electronic device, such as a
diode, field-effect transistor Shot noise is sometimes called
(FET) or bipolar transistor (BJT). transistor noise and is additive
with thermal noise.

3 Transit Time Noise

Transit-time noise is any Transit-time noise in transistors
modification to a stream of are determined by carrier
carrier signals as they passed mobility, bias voltage, and

from the input to the output of a transistor construction.
device (such as from the emitter
to the collector of a transistor)
produces an irregular, random
variation.

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