论文部分内容阅读
频率合成就是从一个频率或多个频率中产某些需要的频率。最普通的频率合成器使用高稳定的固定的基准频率,产生稳定度与基准频率相同的固定的或可变的输出频率。和其它定义一样,这种定义法也不是精确的,我们将看到频率合成是多种技术的特殊组合,这些技术多已在电子应用中广泛使用。在过去的十五年里,由于急需具有基准频率稳定度的可变频率,人们集中地研究了频率合成法。这种合成器主要用在需要有精确载波的窄带调制的无线电通信装备和能够
Frequency synthesis is the production of certain frequencies from one or more frequencies. The most common frequency synthesizers use a high stable fixed reference frequency to produce a fixed or variable output frequency with the same stability as the reference frequency. As with other definitions, this definition is not exact, and we will see that frequency synthesis is a special combination of several techniques that are widely used in electronic applications. In the past fifteen years, the frequency synthesis method has been intensively studied because of the much-needed variable frequency with the stability of the reference frequency. This synthesizer is mainly used in narrowband modulated radiocommunication equipment that needs accurate carrier and can