Understand the operation of a DAC according to its timing diagram, and
devise a circuit that can operate at a desired range.
DAC의 timing diagram에 따른 사용 방법을 이해하고 원하는 range에 맞추어 입출력하
는 회로를 제작한다.
① Understand the characteristics and the operating principle of a DAC utilizing the
current mirror using R-2R
② Understand the characteristics and the operating principle of DACs
3. Theory
Thermometer DACs and binary weighted DACs require large silicon area
since 2
N
components are required. Binary weighted DACs also require a very
precise ratio of components which limit the resolution of the DAC for components
with larger values have lower accuracy. To devise a DAC while utilizing less
number of devices and smaller ratio between the components, R-2R structure as
shown in figure 4-1 can be used.
V
ref
R
R
R
R
2R
2R
2R
R
R
f
V
o
R
2R
R
2R
R
2R
a
c
b
I
2I
I
4I
2I
4I
8I
Figure 4-1 R-2R DAC

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*