公开(公告)号：US20080309435A1

公开(公告)日：2008-12-18

申请号：US12112028

申请日：2008-04-30

Applicant: Han-Hao Wu

Inventor： Han-Hao Wu

IPC: H01P1/20

CPC classification number: H03H7/0123 ,  H01P1/20363 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/18 ,  H03H2250/00

Abstract: A noise filter connected to an LC oscillator is provided. The noise filter comprises a transmission line, a DC bias circuit, and a capacitor. The transmission line is connected to the LC oscillator. The DC bias circuit is connected to the transmission line and provides a bias current. The capacitor has one end connected between the transmission line and the DC bias circuit and the other end AC grounded and provides a path to AC ground to the transmission line. A length of the transmission line is odd times that of a quarter-wavelength of a secondary harmonic wave of the LC oscillator.

Abstract translation: 提供连接到LC振荡器的噪声滤波器。 噪声滤波器包括传输线，DC偏置电路和电容器。 传输线连接到LC振荡器。 直流偏置电路连接到传输线并提供偏置电流。 电容器的一端连接在传输线和直流偏置电路之间，另一端交流接地，并向传输线提供到交流地的路径。 传输线的长度是LC振荡器的二次谐波的四分之一波长的奇数倍。