hsp50214a Intersil Corporation, hsp50214a Datasheet - Page 17

• Manufacturer Part Number: hsp50214a
• Description: Programmable Downconverter
• Manufacturer: Intersil Corporation

NOTE: While Halfband filters are typically selected starting with the last stage in the filter chain to give the maximum alias free
FIGURE 18. HALFBAND FILTER FREQUENCY RESPONSE
COEFFICIENTS
-100
-120
-20
-40
-60
-80
0
bandwidth, a higher throughput rate may be obtained using other filter combinations. See Application Note 9720, “Calculat-
ing Maximum Processing Rates of the PDC”.
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
-6dB BANDWIDTH
NORMALIZED FREQUENCY (F
0.125
- 0.031303406
- 0.031303406
HALFBAND FILTER 5
HALFBAND FILTER 4
HALFBAND FILTER 3
HALFBAND FILTER 2
HALFBAND FILTER 1
0.000000000
0.281280518
0.499954224
0.281280518
0.000000000
HALFBAND #1
0.25
TABLE 4. HALFBAND FILTER COEFFICIENTS
-0.049036026
-0.049036026
N
0.005929947
0.000000000
0.000000000
0.29309082
0.499969482
0.29309082
0.000000000
0.000000000
0.005929947
)
HALFBAND #2
0.375
HSP50214A
0.5
17
-0.00130558
-0.06055069
-0.06055069
-0.00130558
0.000000000
0.012379646
0.000000000
0.000000000
0.299453735
0.499954224
0.299453735
0.000000000
0.000000000
0.012379646
0.000000000
HALFBAND #3
FIGURE 19. HALFBAND FILTER ALIAS CONSIDERATIONS
-100
-120
-20
-40
-60
-80
0
ALIAS
PROFILES
0.125
NORMALIZED FREQUENCY (F
-0.003810883
-0.069904327
-0.069904327
-0.003810883
0.000378609
0.000000000
0.000000000
0.019245148
0.000000000
0.000000000
0.304092407
0.500000000
0.304092407
0.000000000
0.000000000
0.019245148
0.000000000
0.000000000
0.000378609
HALFBAND #4
HALFBAND FILTER 4
HALFBAND FILTER 3
HALFBAND FILTER 2
HALFBAND FILTER 1
HALFBAND FILTER 5
0.25
-0.000347137
-0.010158539
-0.081981659
-0.081981659
-0.010158539
-0.000347137
-6dB BANDWIDTH
0.000000000
0.00251317
0.000000000
0.000000000
0.03055191
0.000000000
0.000000000
0.309417725
0.500000000
0.309417725
0.000000000
0.000000000
0.03055191
0.000000000
0.000000000
0.00251317
0.000000000
HALFBAND #5
0.375
N
)
0.5