鈥?/div>
INVERSE SINC, SQUARE ROOT NYQUIST
( ARBITRARY SHAPING AVAILABLE)
FLAT GROUP DELAY
SHARP ATTENUATION
COMPACT SIZE
FREQUENCY RANGE; 1 MHZ - 3000 MHZ
DESCRIPTION
The Comstron Model PSC-4490 is a Nyquist bandpass
filter used in a DAC( digital to analog converter). The
purpose of the filter is to normalize the amplitude
response of an input
錚?/div>
(Sin x)/x
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signal spectrum, and
to reject unwanted frequencies while maintaining low
group delay variation in the passband. The equalizing
)
---------
shape over the passband is |x/sin x|
2
where
x
=
( 蟺
f
-
fs
and fs=50.0 MSPS (sampling rate).
PSC-4490
1
2
