Digital to Analog Converter (DAC)
•Digital means binary (1 0) and 1 and 0 may be true and false
or on and off or high and low.
•Analog means continuous signal or
information represented by variable quantity.
•Converter is a device.
•DAC stands for Analog to Digital Converter.
•DAC
is a device use for converting digital
data to analog form.
•Application
of DAC are in electronic
audio devices, oscilloscope, printers, electronic speed controllers, Computer, telephone, mobile, etc.
•DAC
is like a modulator.
•Converting
signal from digital to analog degrade the signal therefore details are chosen to neglect errors.
•Common
types of DAC are pulse
width modulator, oversampling DAC, binary weighted DAC, R-2R ladder DAC, Hybrid DAC etc.
•Now DAC conversion is of three types one is Amplitude Shift Keying (ASK) second is Frequency Shift Keying (FSK) third is Phase Shift Keying (PSK).
•Amplitude
Shift
Keying (ASK) is represent digital data as a
variation in the amplitude of a carrier wave.
•Frequency
Shift Keying (FSK) is digital data is transmitted
through discrete frequency changes of carrier wave.
•Phase
Shift
Keying (PSK) is transmit digital data by
changing the phase of carrier wave.
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