Title:
【発明の名称】改善された直角ノツチフイルタ
Document Type and Number:
Japanese Patent JPS63502133
Kind Code:
A
Abstract:
An enhanced quadrature notch filter which is capable of rejecting an undesired signal component of an input signal, generally comprising a quadrature phase splitter for producing first and second reference signals which have substantially the same frequency as the undesired signal component but which are 90 DEG out of phase with each other, a pair of amplitude control loops for adding the first and second reference signals to the input signal in amplitudes which will cancel the undesired signal component, and a phase locked loop circuit for maintaining a predetermined phase relationship between the undesired signal component and one of the first and second reference signals.
Inventors:
Jyosen, Plevan Bee
Application Number:
JP50005886A
Publication Date:
August 18, 1988
Filing Date:
November 17, 1986
Export Citation:
Assignee:
Hiyu's Aircraft Company-
International Classes:
G01S7/36; H03H11/02; H03H19/00; G01S7/32; (IPC1-7): G01S7/32; G01S7/36; H03H11/02
Attorney, Agent or Firm:
Takehiko Suzue