Page 19 - Digital e-book_Neat

ANALOG PULSE MODULATION

 Pulse-amplitude modulation (PAM):
The amplitude of the pulse changes
according to amplitude of the
modulating signal at the sampling
instant

 Pulse-width modulation (PWM):
The width of the pulse changes
according to amplitude of the
modulating signal at the sampling
instant

 Pulse-position modulation (PWM):
The position of the pulse changes
according to amplitude of the
modulating signal at the sampling
instant