公开(公告)号：US3898375A

公开(公告)日：1975-08-05

申请号：US42431973

申请日：1973-12-13

Applicant: RCA CORP

Inventor： HANNAN WILLIAM JAMES ,  SINGLETON ROBERT SHELBY

IPC: H03H7/01 ,  H03H7/06 ,  H03H7/07 ,  H03J5/00 ,  H04B1/10 ,  H04B3/36 ,  H04N7/16 ,  H04N1/44

CPC classification number: H03H7/1766 ,  H03H7/06 ,  H03H7/07 ,  H03J5/00 ,  H04B3/36 ,  H04N7/166

Abstract: The filter is of a bridged-T construction, and includes a pair of semiconductor rectifiers in back-to-back relationship. An oscillation voltage is applied to the junction of the rectifiers to vary their reverse biases and the junction capacities they exhibit. The variations in notch frequency which result are selected to overlap possible drift in filter tuning and provide continued signal rejection in the presence of such changes.

Abstract translation: 滤波器是桥接T结构，并且包括一对背对背关系的半导体整流器。 整流器的接点施加振荡电压，以改变它们的反向偏置和它们所显示的接合电容。 选择结果的陷波频率的变化与滤波器调谐中的可能漂移重叠，并在存在这种变化的情况下提供持续的信号抑制。