中文摘要：

微弱信号检测技术在当今科学研究领域必不可少，其中锁相放大技术由于在速度和精度这两个方面都能达到很高的要求，因而在微弱信号检测领域得到大量使用。使用DSP Builder可以更加方便高效地进行设计。以DSP Builder软件为工具，介绍了正交矢量型数字锁相放大器各个模块的设计，并对整体设计进行了验证，仿真结果证实设计可行。

英文摘要：

Nowadays the weak signal detection technology is necessary in scientific research field,in which the phaselocked amplifying technology is widely used in the field of weak signal detection because it can meet the requirements of high speed and high accuracy. DSP Builder software is adopted as a tool since DSP Builder can make the design more conveniently and efficiently. The design of each module in orthogonal vector type digital phaselocked amplifier is introduced in this paper. The overall design was verified. The simulation results confirm that the design is feasible.