參數(shù)資料
型號(hào)： P32P4911A
廠商： NXP SEMICONDUCTORS
元件分類： 光電元器件
英文描述： PRML Read Channel with PR4, 8/9 ENDEC, FWR Servo
中文描述： 1 CHANNEL READ CHANNEL, PQFP100
封裝： 14 X 14 X 1.40 MM, PLASTIC, LQFP-100
文件頁(yè)數(shù)： 17/63頁(yè)
文件大?。?/td> 257K
代理商： P32P4911A
1996 Jul 25
17
Philips Semiconductors
Product specification
PRML Read Channel with PR4,
8/9 ENDEC, FWR Servo
P32P4911A
G
ROUP
D
ELAY
E
QUALIZATION
The group delay
% can be programmed between -30% to +30% by the 6-bit linear FGD DAC. The FGD register holds
the 6-bit DAC control value. The group delay
% is set as:
Group Delay
% = 0.9783 * (FGD4:0) - 0.665 0
≤
FGD4:0
≤
31 and FGD5 = sign bit
The group delay
% is defined to be the percentage change of the absolute group delay due to equalization from the
absolute group delay without equalization at DC.
The current reference for the filter DACs is set using a single 12.1 k
resistor, from the VRX pin to ground. The voltage
at VRX is proportional-to-absolute-temperature (PTAT).
The outputs of the filter are internally AC coupled to the qualifier inputs and buffers for the filter monitoring test points
TPC+/TPC- and TPD+/TPD-.
Internal AC Coupling
The conventional external ac coupling at the filter to qualifier interface has been replaced by a pair of feedback circuits,
one for the normal and one for the differentiated outputs of the filter. The offset of the filter outputs are sensed, integrated,
and fed back to the filter output stage. The feedback loop forces the filter offset nominally to zero. In the normal read
mode, (LOWZ=0), the integration time constant is set to 5
μ
s until the sync field counter reaches the programmed SFC
count. At the SFC count, the offset sensing is switched into sampled mode and the time constant is reduces to 300 ns.
In sampled mode the offset correction voltage is generated from the zeros qualified by the quantizer. This ensures that
the sampled voltage level, not DP/DN, will be offset free.
Table 2: Ratio of Actual -3dB Bandwidth to Cutoff Frequency
Alpha Boost
Group Delays
%
±
30%
2.81
3.36
3.97
4.63
5.34
6.10
6.89
7.72
8.58
9.47
10.4
11.3
12.2
13.2
±
25%
2.12
2.76
3.45
4.19
4.97
5.79
6.64
7.51
8.41
9.33
10.3
11.2
12.2
13.1
±
20%
1.47
2.21
2.99
3.80
4.65
5.52
6.42
7.34
8.27
9.22
10.2
11.1
12.1
13.1
±
15%
.89
1.72
2.58
3.47
4.38
5.30
6.24
7.19
8.15
9.12
10.1
11.1
12.1
13.1
±
10%
0.42
1.33
2.27
3.21
4.17
5.14
6.11
7.09
8.07
9.05
10.1
11.0
12.0
13.0
±
5%
±
0%
0 dB
1
2
3
4
5
6
7
8
9
10
11
12
13
0.11
1.09
2.07
3.05
4.04
5.03
6.03
7.02
8.02
9.01
10.0
11.0
12.0
13.0
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.0
11.0
12.0
13.0
相關(guān)PDF資料
PDF描述
P3500SA SIDACtor Device
P3500S SIDACtor Device
P3500SCMC solid state crowbar devices
P3500SD solid state crowbar devices
P3500SC SIDACtor Device
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P32P4F-F 制造商:TE Connectivity 功能描述:
P32RIGIDT 制造商:Brady Corporation 功能描述:SIGN NO UNAUTHORISED PERSONS 250X200
P32-S 制造商:Linemaster Switch Corporation 功能描述:Premier
P32W2A2-100-7 功能描述:膠帶 Acrylic Foam Tape 1/32" x 1" x 7YD RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
P32W2A2-100-72 功能描述:膠帶 Acrylic Foam Tape 1/32" x 1" x 72YD RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*