Active electrical circuitry interconnected and shielded by elastomer means
US5200717A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Apr 11, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/0218
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.