公开(公告)号：US08036622B2

公开(公告)日：2011-10-11

申请号：US11341184

申请日：2006-01-28

申请人： Runhua (Ray) Sun ,  Christian Holenstein ,  James Jaffee

发明人： Runhua (Ray) Sun ,  Christian Holenstein ,  James Jaffee

IPC分类号： H04B1/10 ,  H04B17/00

CPC分类号： H03D3/008

摘要： Techniques for cancelling DC offset are described. A DC offset cancellation circuit in a receiver cancels DC offsets caused by leaked LO (local oscillator) signals from a LO signal generator. The receiver first calibrates itself by using the DC offset cancellation circuit during a transmit mode. During the calibration, the DC offset cancellation circuit stores the DC offset voltage signal caused by the leaked LO signals. During a receiving mode when the receiver is receiving a signal, the receiver subtracts the stored DC offset voltage signal from the received signal to cancel the DC offsets caused by leaked LO signals.

摘要翻译： 描述了消除DC偏移的技术。 接收器中的DC偏移消除电路消除由LO信号发生器泄漏的LO（本地振荡器）信号引起的DC偏移。 接收机首先通过在发送模式期间使用DC偏移消除电路进行自校准。 在校准期间，DC偏移消除电路存储由泄露的LO信号引起的DC偏移电压信号。 在接收器接收信号的接收模式期间，接收机从接收信号中减去存储的直流失调电压信号，以消除由泄露的LO信号引起的直流偏移。