The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1993
Filed:
Apr. 11, 1991
Michael L Kyle, Portland, OR (US);
Tektronix, Inc., Wilsonville, OR (US);
Abstract
An attenuator assembly (38) employs circuitry formed on an attenuator substrate (44) having short voltage divider path lengths that allow the use of low-cost divider selecting relays (58, 60, and 62) while maintaining low VSWR and aberration levels through the attenuator. An interconnect circuit board (80) provides electrical power, control signals, a ground plane shield (108), and probe coding contacts (32) for connection to the attenuator substrate. The circuits on the attenuator substrate are laser-trimmed to obtain predetermined electrical characteristics prior to assembly in a completed attenuator assembly. The attenuator substrate rests on a recess (128) formed in top margin (127) of a cavity (120) formed within a housing (42). A conductive elastomer (102) compressed between the attenuator substrate and the interconnect board electrically connects the interconnect board circuits with the attenuator circuit and forms a conductive shield path (110) between the housing and the ground plane shield of the interconnect board. Multiple attenuator circuits, each in a separate cavity of the housing, share a single interconnect board and conductive elastomer material, thereby resulting in a simple, well shielded, low-cost, attenuator assembly.