Intel 8253 - Page 198

Nyquist Rate
D/A
(Ideal)
S&H
Fundamentals
• Traditional Data converters at
Nyquist Rate (fs>2fm)
– D/A Converter:
LPF +
Droop correction
y
n
Y
k
(f)
y(t)
y
SH
(t)y
k
(t)
fsfm 2fs
Binary Number
10001000111...
fsfm 2fs fsfm 2fs
Y(f)
Analog and Mixed Signal Center, TAMU
• Droop correction means inverse Sinc
• The S/H is a “deglitching” circuit and
could be eliminated for small glitches