摘要
介绍了 ADI Sim PLL Ver2模拟软件的性能及特点 ,并阐明了利用该软件设计不同频率下环路滤波器 (低通滤波器 )的方法 ,环路滤波器是频率合成器的关键部分 ,直接影响无线通讯的载波质量、接收性能、发射和接收信噪比、接收灵敏度、通讯距离等 ,严重的会影响到频率的合成 ,导致系统瘫痪。该模拟软件具有功能强大、快捷、方便的特点 ,能对不同的频率进行准确、可靠的模拟 ,设计出合理、稳定的环路滤波电路 ,保证整个系统的需要 ,可广泛地应用于 GSM、CDMA、WLAN。
This article introduces features and characterstics of the simulation software, ADI SimPLL Ver 2, and illuminate the method to design the loop filter(low-pass filter) in PLL under different frequencies by the use of this software. As a key part of frequency synthesizer, loop filter will influence the quality of carrier, the receiving performance, the transmiting/receiving S/N, receiving sensitivity and the communication range, even the synthesization of frequency and result in the system malfunction. This simulation software, which is provided with strong and convenience performance, can carry out correct and reliable simulation on different frequency and help the designer to design reasonable and steady loop filter circuit to meet the system requirement. It can be used in the mobile communication field such as GSM, CDMA, WLAN and two-way radio.
出处
《电气电子教学学报》
2004年第5期107-109,共3页
Journal of Electrical and Electronic Education
