參數(shù)資料
型號(hào)： CE6353
廠商： Intel Corp.
英文描述： Nordig Unified DVB-T COFDM Terrestrial Demodulator for PC-TV and Hand-held Digital TV (DTV)
中文描述： NorDig統(tǒng)一的DVB - T的COFDM地面解調(diào)器為PC - TV和手持式數(shù)字電視（DTV）
文件頁(yè)數(shù)： 24/26頁(yè)
文件大?。?/td> 322K
代理商： CE6353
CE6353
Data Sheet
24
Intel Corporation
4.4.1.3 Calculating Crystal Power Dissipation
To calculate the power dissipated in a crystal the following equation can be used.
Equation 3 -
Pc
= power dissipated in crystal at resonant frequency (W)
Vpp
= maximum peak to peak output swing of amplifier is 1.8 V for all CVDD
Zin
= crystal network impedance (see Equation 2)
4.4.1.4 Capacitor Values
Using the loop gain limits (5 < A < 25), the maximum and minimum values for C1 and C2 can be calculated with
Equation 4 below.
Equation 4 -
Note: Equation 4 was derived from Equation 1 and Equation 2 using the premise that C1 = C2.
Within these limits, any value for C1 and C2 can now be selected. Normally C1 and C2 are chosen such that the
resulting crystal load capacitance C
L
(see Equation 5) is close to the crystal manufacturers recommended C
L
(standard values for C
L
are 15 pF, 20 pF and 30 pF). The crystal will then operate very near its specified frequency.
Equation 5 -
C
par12
=
parasitic capacitance between the XTI and XTO pins. It consists of the IC package’s pin-to-pin
capacitance (including any socket used) and the printed circuit board’s track-to-track capacitance.
C
par12
≈
2pF.
If some frequency pulling can be tolerated, a crystal load capacitance different from the crystal manufacturer’s
recommended C
L
may be acceptable. Larger values of C
L
tend to reduce the influence of circuit variations and
tolerances on frequency stability. Smaller values of C
L
tend to reduce startup time and crystal power dissipation.
Care must however be taken that C
L
does not fall outside the crystal pulling range or the circuit may fail to start up
altogether. It is also possible to quote C
L
to the crystal manufacturer who can then cut a crystal to order which will
resonate, under the specified load conditions, at the desired frequency.
Finally the power dissipation in the crystal must be checked. If Pc is too high C1 and C2 must be reduced. If this is
not feasible C2 alone may be reduced. Unbalancing C1 and C2 will, however, require checking if the loop gain
condition is still satisfied. This must be done using Equation 1.
C
2
C
1
P
c
= 8.Z
in
V
pp2
C
in
= C
out
=
g
m
A
2
R
f
1
Z
o
1
(2.
π
.f)
2
.ESR when: C
1
= C
2
= C
out
- C
par
-
-
.
- C
L
= C
out
. C
in
C
out
+ C
in
+ C
par12
Note:
2 >
> 0.5
相關(guān)PDF資料
PDF描述
CE66P1 0.35um CMOS Technology
CE66P2 0.35um CMOS Technology
CE66P3 0.35um CMOS Technology
CE66P4 0.35um CMOS Technology
CE66P5 0.35um CMOS Technology
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CE645W5H56VJIBF 制造商: 功能描述: 制造商:undefined 功能描述:
CE64MGMVA-F1050-D 制造商:Delkin Devices 功能描述:64GB CF, SLC NAND, -40 TO 85C OPERATING TEMP, LOCKED BOM, MA - Bulk
CE66 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:0.35um CMOS Technology
CE66.5100.151 功能描述:交流電源輸入模塊 CE PWR ENTRY MODULE W. FILTER 10A RoHS:否 制造商:Schurter 過濾:Yes 過濾器類型:IEC Inlet Filters 產(chǎn)品:Inlets 電流額定值:4 A 電壓額定值:250 VAC 外殼材料:Thermoplastic 安裝風(fēng)格:Panel, Screw 端接類型:Quick Connect 工作溫度范圍:- 25 C to + 85 C 連接器類型:C-14
CE66P1 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:0.35um CMOS Technology
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

*
*
*