13-09-2013, 02:46 PM
DIGITAL TO ANALOG CONVERTER
Aim:
To construct a 8 – bit digital to analog converter using R – 2R ladder type.
Theory:
A DAC accepts an n – bit input word b1, b2, .., bn in binary and produces an
analog signal that is proportional to the input. In this type of DAC, reference voltage is
applied to one switch and the other switches are grounded. It is easier to build and
number of bits can be expanded by adding more R – 2R sections. The circuit slow down
due to stray capacitance.
Result:
Thus R – 2R ladder type digital to analog converter is implemented.