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參數(shù)資料
| 型號： | HSP50214AVI |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | Programmable Downconverter |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP120 |
| 文件頁數(shù)： | 22/60頁 |
| 文件大?。?/td> | 467K |
| 代理商： | HSP50214AVI |
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22
Using AGC loop gain, the AGC range, and expected error
detector output, the gain adjustments per output sample for
the Loop Filter Section of the Digital AGC can be given by
The loop gain determines the growth rate of the sum in the
loop accumulator which, in turn, determines how quickly the
AGC gain traces the transfer function given in Figures 21
and 22. Since the log of the gain response is roughly linear,
the loop response can be approximated by multiplying the
maximum AGC gain error by the loop gain. The expected
range for the AGC rate is ~ 0.00004 to 1.23dB/symbol time
for a threshold of 1/2 scale. See the notes at the bottom of
Table 9 for calculation of the AGC response times. The max-
imum AGC Response is given by:
Since the AGC error is scaled to adjust the gain, the loop
settles asymptotically to its final value. The loop settles to
the mean of the signal.
S
S
EXP=2
NNNN
MANTISSA =
01.XXXXXXXXXXXXXX
LIMIT
DET
L
L
LIMIT
DET
R
18
IFIR
QFIR
QAGC
IAGC
T
U
T
MAGNITUDE
(RANGE = 0 TO 2.3)
S
L
M
E
AGCGNSEL
MANTISSA
EXP
LIMIT
DET
UPPER LIMIT
LOWER LIMIT
μ
P
SERIAL
OUT
MSB = 0
AGC LOOP FILTER
AGC MULTIPLIER/SHIFTER
18
26
18
18
26
RESAMPLING
FIR FILTERS
AND
INTERPOLATING
HALFBAND
FILTERS
CARTESIAN
TO
POLAR
COORDINATE
CONVERTER
(G = 1.64676)
4
16
L
13
R
16
16
4
4
A
A
L
M
E
13
13
AGC ERROR SCALING
AGC
ERROR
DETECTOR
MSB = 0
(RANGE = 0 TO 1)
Controlled via microprocessor interface.
FIGURE 23. AGC BLOCK DIAGRAM
(RANGE = 0 TO 2.18344)
+
(EQ. 18)
AGC Slew Rate
1.5dB THRESH
MAG*1.64676
ELG
(
)) ×
–
=
M
LG
(
)
2
4
(
–
)
2
15
–
(
)
–
(EQ. 19)
AGC Response
Max
Input(Cart/Polar Gain)(Error Det Gain) AGC
Loop Gain)(AGC Output Weighting)
=
HSP50214A
相關PDF資料 |
PDF描述 |
|---|---|
| HSP50214B | Programmable Downconverter |
| HSP50214BVC | Programmable Downconverter |
| HSP50214BVI | Programmable Downconverter |
| HT84 | ADSL Coupling Transformers |
| HT84-00594 | ADSL Coupling Transformers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HSP50214B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter |
| HSP50214B_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter |
| HSP50214BVC | 功能描述:上下轉(zhuǎn)換器 120L MQFP COMTEMP 14-BIT PROGRAMMABLE DOWNCONVERTER 65MSPS RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| HSP50214BVCZ | 功能描述:上下轉(zhuǎn)換器 120L MQFP COMTEMP 14-BIT PROG DWNCNVRT RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| HSP50214BVI | 功能描述:上下轉(zhuǎn)換器 120L MQFP INDTEMP 14-BIT PROGRAMMABLE DOWNCONVERTER 65MSPS RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
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