Gesproken tekst vertalen, offlinefuncties, synoniemen, vervoegingen, educatieve spelletjes
Publiciteit
Registreer gratis: toegang tot meer resultaten en functies
integer-n type pll
Vertaling van "integer-n type pll" in Chinees
整数N型PLL
In order to reduce the noise, it is necessary to use a low pass filter, and a configuration is likely to be more complicated than the integer-N type PLL.
为了降低噪声，需要使用低通滤波器，配置可能比整数N型PLL复杂得多。
In other words, the transmitting apparatus 400 can obtain an IF signal of a desired IF frequency FIF by the simple configuration in which the integer-N type PLL is used as the local oscillating unit 313. In other words, the transmitting apparatus 400 can more easily implement a high-accuracy frequency transform.
换句话说，通过使用整数N型PLL作为本机振荡单元313的简单配置，传输装置400可获得所需IF频率FIF的IF信号。换句话说，传输装置400可更易进行高精度频率转换。
Therefore, when the integer-N type PLL is used as the local oscillating unit, it is likely to be difficult to sufficiently reduce the step size ΔFLO of the local oscillation frequency FLO, and to be difficult to control a frequency transform of a reception signal or a transmission signal with a sufficiently high degree of accuracy.
因此，使用整数N型PLL作为本机振荡单元时，可能难以充分降低本机振荡频率FLO的步长ΔFLO，难以在足够高的精度下控制接收信号或传输信号的频率转换。
Here, since the division ratio M is an integer, it is difficult to cause ΔFLO to have a desired frequency step size by adjusting the value of the division ratio M. Further, since the local oscillating unit 106 is configured with an integer-N type PLL, it is also difficult to use a fraction as the division ratio M. In addition, when the comparison frequency FREF is changed, a characteristic of the PLL changes, and the performance is significantly affected.
此处，由于分频比M是整数，难以通过调整分频比M的值使ΔFLO具有所需频率步长。进一步，由于本机振荡单元106配置有整数N型PLL，也难以使用分数作为分频比M。另外，更改比较频率FREF时，PLL的特性改变，大大影响了性能。
Further, based on Equation (6), ΔFVCO may be expressed using a variable step size ΔN of the division ratio N of the counter 29 of the local oscillating unit 106 and the comparison frequency FREF of the integer-N type PLL of the local oscillating unit 106 as in the following Equation (10)
进一步，可基于方程（6）利用本机振荡单元106的计数器29的分频比N的可变步长ΔN和本机振荡单元106的整数N型PLL的比较频率FREF表示ΔFVCO，如以下方程所示（10）：
In other words, when the integer-N type PLL (FIG. 2) having the simple configuration is applied as the local oscillating unit 313, it is likely to be difficult for the transmitting apparatus 310 to reduce ΔFVCO and ΔFLO and to control the oscillation frequency FVCO and the LO frequency FLO with a sufficiently high degree of accuracy (with a sufficiently small step size), similarly to the receiving apparatus 10.
换句话说，将具有简单配置的整数N型PLL（图2）作为本机振荡单元313时，传输装置310可能难以在足够高的精度（足够小的步长）下降低ΔFVCO和ΔFLO并控制振荡频率FVCO和LO频率FLO，与接收装置10相似。
In this regard, in the transmitting apparatus, an error occurring at the IF frequency FIF is corrected using the integer-N type PLL instead of the fractional-N type PLL.
鉴于此，在传输装置中，使用整数N型PLL代替分数N型PLL，对IF频率FIF下发生的误差进行校正。
In other words, as described above, when the integer-N type PLL is used, the control accuracy of the IF frequency FIF is likely to be lower (larger in the step size) than when the fractional-N type PLL is used, but an error of the IF frequency FIF occurring due to a difference in the accuracy (step size), that is, an error of the LO frequency FLO, is corrected.
换句话说，如上所述，使用整数N型PLL时，IF频率FIF的控制精度可能低于使用分数N型PLL的情况，但精度（步长）的差产生的IF频率FIF的误差，即，LO频率FLO的误差，得以校正。
In order to further reduce a step size ΔFLO of the local oscillation frequency FLO, it is necessary to further reduce a step size ΔFVCO of an oscillation frequency FVCO of a voltage controlled oscillator (VCO) in the PLL, but in the integer-N type PLL, the oscillation frequency FVCO of the VCO can have only an integer multiple of a comparison frequency FREF of the PLL.
为了进一步降低本机振荡频率FLO的步长ΔFLO，需要进一步降低PLL中电压控制振荡器（VCO）的振荡频率FVCO的步长ΔFVCO，但在整数N型PLL中，VCO的振荡频率FVCO的整数仅为PLL的比较频率FREF的几倍。
In the transmitting apparatus 400, the integer-N type PLL of the simple configuration is applied as the local oscillating unit 313. The integer-N type PLL has the division ratio N of an integer as described above.
在传输装置400中，将简单配置的整数N型PLL作为本机振荡单元313。整数N型PLL具有整数分频比N，如上所述。
Ga naar Premium voor toegang tot miljoenen vertaalvoorbeelden, onbeperkt woorden opslaan en leren, zonder advertenties.
Woord & uitdrukking van de dag
Afbeelding van de dag
Resultaten: 10. Exact: 10. Verstreken tijd: 11 ms.
