a long string of numbers
Digital signal is moreefficientimmune to noiseerror freethan analog signal.
Voice signals are analog signals, whereas computer signals are digital .
The electric motor does not work on the principle of the amplifier and the digital signals.
A digital converter converts the analog signals that are received by your TV to digital signals. Most TV providers only offer digital TV these days, so you only need it if you're still using analog.
AGND means Analog ground & DGND means Digital ground. Due to fast switching of digital signals it is possible for noise generation which affect nearby analog signals.(If common gnd used for both analog & digital). If separate gnd used for both the signals.Noise will not affect the signals.
Waves
Digital signals are measured in bits per second (bps).
digital signals have two values. 0 and 1.
A microphone converts voice sound waves into electrical signals, which are then digitized by an analog-to-digital converter (ADC) to produce digital signals. These digital signals can then be processed and transmitted digitally.
Analogue signals are more vulnerable to error than digital signals. See the related question "Why digital signals are more noise free than analogue signals?" for more details.
Digital signals are measured in bits per second (bps).
To measure time between digital signals.
modem is the device that carries digital signals
it is an DAC (Digital to analogue converter
digital video camera
Hybrid signals are the combination of both analog and digital signals
Transforming analog signals to digital is known simply as analog to digital conversion, sometimes shortened to A-D conversion.