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參數(shù)資料
| 型號(hào)： | BT261KPJ |
| 元件分類： | TVS-瞬態(tài)抑制二極管 |
| 英文描述： | Transient Voltage Suppressor Diodes |
| 中文描述： | 視頻信號(hào)發(fā)生器 |
| 文件頁數(shù)： | 16/56頁 |
| 文件大?。?/td> | 387K |
| 代理商： | BT261KPJ |
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Bt261
30 MHz Pixel Clock Monolithic CMOS HSYNC Line Lock Controller
Brooktree
10
C
IRCUIT
D
ESCRIPTION
Phase/Frequency Detector Operation
L261_H
Phase/Frequency Detector Operation
The phase comparator compares the phase of the falling edge of the noise-gated
CSYNC* and generated HSYNC. The HSYNC can be either internally generated
(and optionally output onto the HSYNC pin) or an external HSYNC signal can be
input via the HSYNC pin.
Two Forms of Noise Gating Available
The Bt261 offers two forms of noise gating to remove half-line serration and
equalization pulses during the vertical interval, which can cause loop disturbances
and wavering at the beginning of the displayed field. The first is a digital noise gate
that is programmed in pixel clock events following the falling edge of composite
sync. The noise-gate start must occur before the halfway point (HCOUNT/2). The
noise-gate stop value must relate to a clock count a maximum distance from the
end of line, defined as one half the minimum width of the serration pulse, less 500
ns. One half the equalization pulse provides the maximum error deviation for cor-
rect phase comparison. The 500 ns delay is required because of the offset used dur-
ing phase limiting. Even when phase limiting is disabled, this delay is included in
both the noise-gated CSYNC* and generated HSYNC* paths. Therefore, it must
be accounted for in the noise-gate stop value (see Figure 3 [a–d]). The earliest pos-
sible noise-gate stop value permits the widest phase-error tracking range. For an
acquisition range greater than one half the minimum equalization pulse width
(
±
2.3
μ
s or 3.6 percent of nominal RS170A), the noise gate should be set transpar-
ent by programming a start value greater than HCOUNT and a stop value less than
HCOUNT until lock is verified in the active field. The status registers can be mon-
itored to verify lock.
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| BT-27 | 功能描述:TERM BLOCK HIGH CURRENT 27CIRC RoHS:是 類別:連接器，互連式 >> 接線座 - 隔板塊 系列:BT 標(biāo)準(zhǔn)包裝:10 系列:Beau™ 38780 端接塊類型:阻隔塊 電路數(shù):15 導(dǎo)線入口數(shù)目:30 間距:0.438"（11.12mm） 行數(shù):2 電流:15A 電壓:300V 線規(guī):14-22 AWG 頂部端子:螺釘 底部端子:焊片 阻擋層類型:雙壁（雙） 特點(diǎn):法蘭 顏色:黑 包裝:散裝 安裝類型:通孔 工作溫度:- 材料 - 絕緣體:聚對(duì)苯二甲酸丁二酯（PBT），玻璃纖維增強(qiáng)型 材料可燃性額定值:UL94 V-0 其它名稱:038780-111538780-1115387801115 |
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