公开(公告)号：US3582785A

公开(公告)日：1971-06-01

申请号：US3582785D

申请日：1969-09-12

Applicant: BELL TELEPHONE LABOR INC

Inventor： GAUNT WILMER B JR

IPC: H04B14/06 ,  H04L5/14 ,  H04B1/00

CPC classification number: H04L5/1423 ,  H04B14/062

Abstract: A signal transfer system using delta modulation to exchange signals between a plurality of stations is described in which a hybridless bilateral circuit is connected between each station and a common transmission path. The bilateral circuit includes a delta modulation coder comprising a pair of cascaded delay circuits and integrating network demodulators connected in a negative feedback arrangement. The negative feedback arrangement connected between a pair of selected bilateral circuits operates to exchange signals by minimizing the signal differences between the stations.

公开(公告)号：US3530260A

公开(公告)日：1970-09-22

申请号：US3530260D

申请日：1966-12-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： GAUNT WILMER B JR

IPC: H04B1/58 ,  H04M1/58

CPC classification number: H04B1/586

公开(公告)号：US3480742A

公开(公告)日：1969-11-25

申请号：US3480742D

申请日：1967-03-31

Applicant: BELL TELEPHONE LABOR INC

Inventor： GAUNT WILMER B JR

IPC: H04B1/58 ,  H04B3/38 ,  H04B3/58

CPC classification number: H04B1/586