公开(公告)号：US20110142113A1

公开(公告)日：2011-06-16

申请号：US12963385

申请日：2010-12-08

申请人： Mitsuhiko HOKAZONO ,  Tetsuya Heima ,  Kazuaki Hori

发明人： Mitsuhiko HOKAZONO ,  Tetsuya Heima ,  Kazuaki Hori

IPC分类号： H04L27/36 ,  H04B17/00

CPC分类号： H04L27/0014 ,  H03D7/1441 ,  H03D7/1458 ,  H04L27/362 ,  H04L2027/0018

摘要： The present invention provides a communication apparatus (RFIC) capable of performing a DC offset correction of an orthogonal modulation unit with a degree of accuracy higher than conventional. The orthogonal modulation unit of the RFIC includes first and second mixers, an adder and first and second switches. The first mixer receives a first local oscillation signal therein through the first switch. The second mixer receives a second local oscillation signal therein through the second switch. During calibration, a DC offset of the first mixer is adjusted in a state in which the first switch is brought to an ON state and the second switch is brought to an OFF state. Further, a DC offset of the second mixer is adjusted in a state in which the first switch is brought to an OFF state and the second switch is brought to an ON state.

摘要翻译： 本发明提供一种能够以比常规更高的精度执行正交调制单元的DC偏移校正的通信装置（RFIC）。 RFIC的正交调制单元包括第一和第二混频器，加法器和第一和第二开关。 第一混频器通过第一开关接收第一本地振荡信号。 第二混频器通过第二开关接收第二本地振荡信号。 在校准期间，在第一开关处于导通状态并使第二开关处于断开状态的状态下调节第一混合器的直流偏移。 此外，在第一开关处于断开状态并且第二开关变为导通状态的状态下调节第二混合器的DC偏移。