- 您現在的位置：買賣IC網 > PDF目錄385396 > HSP50110JI-52 (HARRIS SEMICONDUCTOR) Digital Quadrature Tuner PDF資料下載
參數資料
| 型號： | HSP50110JI-52 |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 通信及網絡 |
| 英文描述： | Digital Quadrature Tuner |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC84 |
| 文件頁數： | 8/24頁 |
| 文件大小： | 199K |
| 代理商： | HSP50110JI-52 |
3-236
The Integrate and Dump filter exhibits a frequency response
given by
I
R
where f is normalized frequency relative to the input sample
rate, F
S
, and R is the decimation rate [1]. The decimation
rate is equivalent to the number of samples in the integration
period. As an example, the frequency response for an
integrate and dump filter with decimation of 64 is shown in
Figure 6. The decimation rate is controlled by the
Re-Sampler and may range in value from 2 to 4096 (see
Re-Sampler Section).
For applications requiring better out of band attenuation, the
Third Order CIC filter may be selected. This filter has a
frequency response given by
H(f) = [sin(
π
fR)/sin(
π
f)]
3
[1/R]
3
(EQ. 9)
where f is normalized frequency relative to the input sample
rate, and R is the decimation rate [1]. As with the integrate
and dump filter, the decimation rate is controlled by the Re-
Sampler. The decimation rate may range in value from
2-4096 when using CLK, or 3-4096 when using the Re-
Sampler NCO as a CLK source to the filter. The frequency
response for the third order CIC with a decimation rate of 64
is shown in Figure 7.
Compensation filters may be activated to flatten the frequency
responses of the integrate and dump and third order CIC
filters. The compensation filters operate at the decimated data
rate, and flatten the roll off the decimating filters from DC to
approximately one half of the output sample rate. Together,
the Integrate and Dump filter and x/sin(x) compensation filter
typically yield a lowpass frequency response that is flat to
0.45F
S
with 0.03dB of ripple, and the third order CIC with
((x)/sin(x))
3
compensation typically yields a flat passband to
0.45F
S
with 0.08dB of ripple. The overall passband ripple
degrades slightly for decimation rates of less than 10. Some
examples of compensation filter performance for the Integrate
and dump and third order CIC filter are shown overlaid on the
frequency responses of the uncompensated filters in Figure 6
and Figure 7. The coefficients for the compensation filters are
given in Table 2.
The out of band channels and noise attenuated by the
decimating filters are aliased into the output spectrum as a
result of the decimating process. A summation of the alias
terms at each frequency of the output spectrum produce
alias profiles which can be used to determine the usable
output bandwidth. A set of profiles representative of what
would be observed for decimation factors of ~10 or more are
shown in Figures 8 through 11. The Integrate and Dump
filter is typically used as a matched filter for square pulses
H f
( )
---
π
fR
(
)
/sin(
π
f
)
sin
=
(EQ. 8)
SAMPLE TIMES
M
10
NOTE: Example plotted is for R = 64 with 64 samples/symbol.
FIGURE 6. INTEGRATE AND DUMP FILTER (FIRST ORDER
CIC) FREQUENCY RESPONSE
0
-10
-20
-30
-40
-50
-60
COMPENSATION
FILTER
COMPOSITE FILTER
CIC
FILTER
f
S
2R
f
S
R
3f
S
2R
2f
S
R
5f
S
2R
3f
S
R
7f
S
2R
4f
S
R
TABLE 2. COMPENSATION FILTER COEFFICIENTS
COEFFICIENT INDEX
x/sin(x)
[2]
[x/sin(x)]
3
0
-1
-1
1
2
4
2
-4
-16
3
10
32
4
-34
-64
5
384
136
6
-34
-352
7
10
1312
8
-4
-352
9
2
136
10
-1
-64
11
32
12
-16
13
4
14
-1
SAMPLE TIMES
M
10
NOTE:
Example plotted is for R = 64 with 64 samples/symbol.
FIGURE 7. THIRD ORDER CIC FREQUENCY RESPONSE
0
-10
-20
-30
-40
-50
-60
COMPENSATION
FILTER
CIC
FILTER
COMPOSITE FILTER
f
S
2R
f
S
R
3f
S
2R
2f
S
R
5f
S
2R
3f
S
R
7f
S
2R
4f
S
R
HSP50110
相關PDF資料 |
PDF描述 |
|---|---|
| HSP50110JC-52 | CONN HEADER HM 2MM 100POS |
| HSP50110 | Digital Quadrature Tuner(數字調諧器) |
| HSP50210 | Digital Costas Loop(數字Costas鎖相環) |
| HSP50214VC | Programmable Downconverter |
| HSP50214VI | Programmable Downconverter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HSP50110JI-52Z | 制造商:Intersil Corporation 功能描述:PB-FREE W/ANNEAL DIGITAL QUADRATURE TUNER 84 PLCC,52MHZ,INDU - Rail/Tube |
| HSP50210 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Digital Costas Loop |
| HSP50210JC-52 | 功能描述:上下轉換器 COSTAS DEMODULATOR,84 PLCC,52MHZ,COMM RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50210JC-52Z | 功能描述:上下轉換器 COSTAS DEMODULATOR 84 PLCC 52MHZ COM RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50210JI-52 | 功能描述:上下轉換器 COSTAS DEMODULATOR,84 PLCC,52MHZ,IND RoHS:否 制造商:Texas Instruments 產品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-128 |
發布緊急采購，3分鐘左右您將得到回復。