公开(公告)号：US06822434B2

公开(公告)日：2004-11-23

申请号：US10354250

申请日：2003-01-28

申请人： James William Haslett ,  Bogdan Alexandru Georgescu ,  John Godfrey McRory ,  Holly Evelyn Pekau

发明人： James William Haslett ,  Bogdan Alexandru Georgescu ,  John Godfrey McRory ,  Holly Evelyn Pekau

IPC分类号： G01R3300

CPC分类号： H03H7/09 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1296 ,  H03F1/02 ,  H03F1/223 ,  H03F3/191 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/537 ,  H03H7/0115 ,  H03H7/03 ,  H03H7/075 ,  H03H7/12 ,  H03H7/1775

摘要： A monolithic transformer compensated circuit with enhanced quality factor without significantly increasing noise levels is presented in this disclosure. The technique uses a monolithic transformer and a current source driving current into the transformer secondary winding to achieve loss compensation in the transformer primary. An ac current which is proportional to, and in phase with the voltage applied to the primary winding can be used to achieve theoretically perfect loss compensation at a given frequency in the RF (GHz) frequency range. Examples of circuit applications that are particularly suited to the technique include Voltage Controlled Oscillators (VCO's), Low Noise Amplifiers (LNA's) and Filters. The technique has the added advantage of reducing power consumption in some applications.

摘要翻译： 本公开中提出了具有增强的品质因数而不显着增加噪声水平的单片式变压器补偿电路。 该技术使用单片变压器和电流源驱动电流进入变压器次级绕组，以实现变压器初级中的损耗补偿。 可以使用与施加到初级绕组的电压成比例并与其同相的交流电，以在RF（GHz）频率范围内的给定频率实现理论上完美的损耗补偿。 特别适用于该技术的电路应用的示例包括压控振荡器（VCO），低噪声放大器（LNA）和滤波器。 该技术具有在一些应用中降低功耗的附加优点。