公开(公告)号：US3829801A

公开(公告)日：1974-08-13

申请号：US30270672

申请日：1972-11-01

Applicant: INT COMPUTERS LTD

Inventor： PRIESTLY M ,  CORNTHWAITE E

IPC: G01R31/28 ,  H01H67/24 ,  H01P5/02 ,  H01P1/10

CPC classification number: G01R31/2834 ,  H01H67/24

Abstract: A SIGNAL DISTRIBUTION SYSTEM FOR APPLYING SIGNALS TO A DEVICE UNDER TEST IS DESCRIBED. AN INPUT SIGNAL IS APPLIED TO A CENTRE POINT OF A FIRST GROUP OF FOUR RELAYS ON A SUBSTRATE. THE GROUP OF RELAYS ARE ARRAGED SO THAT THE INPUT SIGNAL MAY BE SWITCHED TO ONE OF FOUR SIMILAR GROUPS OF RELAYS SO THAT THE INPUT SIGNAL MAY THEREFORE BE SWITCHED BY OPERATION OF THE APPROPRIATE RELAYS TO ONE OF SIXTEEN OUTPUTS. THE OVERALL TRANSMISSION PATH LENGTHS FROM THE INPUT POINT TO EACH OUTPUT ARE EQUAL TO THUS PROVIDE ALL THE PATHS WITH THE SAME ELECTRICAL CHARACTERISTICS. FURTHER SIMILAR SUBSTRATES MAY BE SPACED FROM THE FIRST SUBSTRATE AND IN THIS CASE A COMMON OUTPUT CHANNEL FOR ALL SUBSTRATES MAY BE PROVIDED ON A CONNECTING PLANE.