一种零中频接收机的直流偏置校准技术

A Technique of DC Offset Calibration in ZIF Receiver

文章对零中频接收机的直流偏置的产生进行了介绍,然后提出一种静态校准与动态校准相结合的两级直流偏置校准技术,既能消除因设计或工艺偏差造成的固有的直流偏置,也能消除由于实时环境因素造成的直流偏置分量。在保证校准具有较高的精度的同时也具备较高的实时校准能力。

In this article the causes of DC offset in ZIF receiver is introduced,then a two-step DC offset calibration technique combining static calibration with dynamic calibration is presented. This technique can not only eliminate inherent DC offset caused by mismatch of design or manufacture technology,but also eliminate DC offset caused by real time environment. It can offer either high accuracy or real time cancellation.