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ZNBG3113
ZNBG3114
For many LNB applications tone detection and band switching is required. The ZNBG3113/14
includes the circuitry necessary to detect the presence of a 22kHz tone modulated on the supply
input to the LNB. Referring to the following schematic diagram, the main elements of this detector
are an op-amp enabling the construction of a Sallen Key filter, a rectifier/smoother and a
comparator. Full control is given over the centre frequency and bandwidth of the filter by the
selection of two external resistors and capacitors (one of these resistors, R2, shares the function
of overvoltage protection of pin V POL ).
Pin C rec makes accessible the output of the tone switch rectifier and provides a means of
controlling tone switch delays (mainly HB-LB). For correct operation of the IC, a capacitor and a
parallel connected resistor should be connected between this pin and ground. A capacitor of
100nF and resistor of 1MW will give a LB-HB delay of around 100 μ s and a HB-LB delay of 30ms.
The comparator circuit utilises no external components.
4-132
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相关代理商/技术参数
ZNBG3114 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:FET BIAS CONTROLLER WITH POLARISATION
ZNBG3114Q20 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115_06 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115Q16 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115Q16TC 功能描述:MOSFET 3BIAS TONE H/V SWTCH 2.2V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube
ZNBG3115Q20 制造商:ZETEX 制造商全称:ZETEX 功能描述:FET BIAS CONTROLLER WITH POLARISATION SWITCH AND TONE DETECTION
ZNBG3115Q20TC 功能描述:MOSFET 3BIAS TONE H/V SWTCH 2.2V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube