公开(公告)号：AU6616490A

公开(公告)日：1991-05-16

申请号：AU6616490

申请日：1990-10-16

Applicant: NOISE CANCELLATION TECHNOLOGIES INC

Inventor： ZIEGLER ELDON W JR ,  GARDNER JOHN W

IPC: H03H21/00 ,  H04B1/10 ,  H04B3/00 ,  H03B1/00 ,  H03K5/00

Abstract: An in wire active cancelling system cancels undesirable repetitive signal components from a primary electronics signal controlling desired intelligent signal components and undesirable repetitive signal components. The primary electronic signal is fed as an input to an electronic mixer. A second input to the electronic mixer is a repetitive cancelling signal which is applied by the mixer to cancel the undesirable repetitive signal component from the primary signal without interfering with passage of the primary signal intelligent signal components. The repetitive cancellation signal is developed from a residual signal developed by the mixer and a timing signal obtained from a timing signal generator.

公开(公告)号：AU3194489A

公开(公告)日：1989-09-06

申请号：AU3194489

申请日：1989-02-17

Applicant: NOISE CANCELLATION TECHNOLOGIES INC

Inventor： GARDNER JOHN W ,  ZIEGLER ELDON W JR

IPC: F01N1/00 ,  F01N1/06 ,  F01N1/08 ,  F01N1/22 ,  G10K11/178