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| 型號： | HSP50415EVAL1 |
| 廠商： | Intersil Corporation |
| 英文描述： | HSP50415EVAL1 Evaluation Kit |
| 中文描述： | HSP50415EVAL1評估板 |
| 文件頁數(shù)： | 13/29頁 |
| 文件大?。?/td> | 229K |
| 代理商： | HSP50415EVAL1 |
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4-13
Carrier NCO and Complex Mixer
Following the interpolating filter is the complex mixer stage
where the quadrature data is modulated onto a carrier signal
via a complex multiply operation resulting in a quadrature
output sample. The carrier NCO has a 32-bit programmable
frequency increment value which is programmed as follows:
carrierPhinc = (carrierFrequency / FSout) * 2^32
The frequency may be positive or negative with a range from
-50 to +50MHz (for FSout of 100MHz). The phase adder and
accumulator are also 32-bits wide.
X/SIN(X) Compensation Filters
Following the complex mixer stage is a pair of fixed
coefficient 11-tap X/SIN(X) compensation filters. The
X/SIN(X) filter performs peaking to compensate for the
SIN(X)/X rolloff that occurs at the output of the DACs. These
filters may be totally bypassed if not required. The X/SIN(X)
filter coefficients are:
-1, 2, -4, 10, -34, 384, -34, 10, -4, 2, -1
The output is rounded to 16-bits. The output of the filter is
not checked for saturation since the maximum sum of
products is 486/512 (0.949) and overflow will never occur.
The data exits the X/SIN(X) filters as a parallel I<15:0> and
Q<15:0> data streams at the final sample rate. Figure 18
plots of the inverse sinc function, sinc function, and the effect
of compensation.
FIGURE 15. RESPONSE FOR L = 6; FOUT = 4096
FIGURE 16. RESPONSE FOR L = 8; FOUT = 4096
FIGURE 17. RESPONSE FOR L = 10; FOUT = 4096
Typical Performance Curves
(Continued)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0
512
1024
1536
2048
SAMPLE TIMES
M
INTERPOLATION FILTER RESPONSE
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-1200
M
512
1024
1536
2048
SAMPLE TIMES
INTERPOLATION FILTER RESPONSE
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-1200
512
1024
1536
2048
SAMPLE TIMES
INTERPOLATION FILTER RESPONSE
HSP50415
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| HSP9520 | Multilevel Pipeline Registers |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HSP50415VI | 功能描述:調(diào)節(jié)器/解調(diào)器 100MQFP, -40+85C,PROGRAMABLE MODULATOR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| HSP50415VIZ | 功能描述:調(diào)節(jié)器/解調(diào)器 W/ANL 100MQFP-40+85C PROGRAMABLE MODLTR RoHS:否 制造商:Texas Instruments 封裝 / 箱體:PVQFN-N24 封裝:Reel |
| HSP50A | 制造商:JLWORLD 制造商全稱:JLWORLD 功能描述:SPEAKER SOUND GENERATORS |
| HSP50B | 制造商:JLWORLD 制造商全稱:JLWORLD 功能描述:SPEAKER SOUND GENERATORS |
| HSP50SA8 | 制造商:RDI 功能描述:SPEAKER 2 ROUND 8 OHMS CLEAR FACE |
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