The objective of the thesis is to explore the noise sources in PLL and find the proper circuit structures to reduce the noise effects. 本文的目的是研究目前应用最广的电荷泵锁相环的噪声特性以寻找减小环路噪声的电路架构。
A vector-hydrophone array simulator can generate the target radiated noise and the ambient noise.Its application can effectively shorten the developing cycle of a digital sonar. 模拟器可以模拟实际海洋环境中目标的辐射特性和噪声特性，应用模拟器可以有效地缩短声纳的研制周期。
