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參數(shù)資料
| 型號(hào)： | ZNBG3115Q20 |
| 廠商： | ZETEX PLC |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVP00; Number of Contacts:42; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | MO-137AD, QSOP-20 |
| 文件頁數(shù)： | 9/14頁 |
| 文件大?。?/td> | 1845K |
| 代理商： | ZNBG3115Q20 |
ZNBG3115
ZNBG3116
ISSUE 1 - JUNE 2001
9
For many LNB applications, tone detection for band switching is required. The ZNBG3115/16 includes all the
circuitry necessary to detect the presence of a 22kHz tone modulated on the supply input to the LNB. The main
elementsofthe detectorareanop-amp,arectifier/smootherandacomparitor.Theop-amphasapre-setinternal
feedback resistor so that just a simple RC network wired to the input gives user defined gain and low frequency
cut filter characteristics. The RC network components also serve two other purposes. The resistor provides
overvoltage protection for the Vpol pin and the capacitor minimises tone interference of the Vpol threshold. The
upper frequency roll-off of the op-amp has been set internally at above 100kHz to allow the amplifier to be used
with other common tone switch frequencies.
The rectifier/smoother/comparitor function is provided by a complex propriety circuit that allows the
ZNBG3115/16 to reliably detect wanted tones whilst ignoring low frequency square wave switch box signals,
DiSEqC bursts and supply switching transients common when using DiSEqC-2 ready set-top boxes. This is
all achieved without the need for any further external components. The threshold of the comparitor is supply
dependent, hence the gain of the preceding op-amp must be adjusted in line with supply voltage. See the table
below for recommended values for 22kHz detection, given for a range of supplies.
Table_1
Filter
Components
Supply Voltage (Vcc)
5V
4.7nF
2k
6V
4.7nF
1.8k
7V
4.7nF
1.5k
8V
10nF
1.3k
9V
10nF
1.1k
10V
10nF
1.0k
Cf
Rvpol (R2)
Note: Optimised for F(tone) = 22kHz.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZNBG3116 | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVP00; Number of Contacts:42; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight |
| ZNBG3211 | TV 30C 30MIX SKT WALL RECP |
| ZNBG3211Q20 | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVP00; No. of Contacts:24; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight |
| ZNBG4000 | FET BIAS CONTROLLER |
| ZNBG4210Q24 | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZNBG3115Q20TC | 功能描述:MOSFET 3BIAS TONE H/V SWTCH 2.2V RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| ZNBG3116 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION |
| ZNBG3116Q16 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION |
| ZNBG3116Q16(1) | 制造商:ZETEX 制造商全稱:ZETEX 功能描述: |
| ZNBG3116Q20 | 制造商:ZETEX 制造商全稱:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION |
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