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Capacitive Coupled Connector

IP.com Disclosure Number: IPCOM000083680D
Original Publication Date: 1975-Jul-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Berard, AD: AUTHOR [+3]

Abstract

This is a nonmechanical signal connector design which can be used for card-to-board, module-to-card, and cabling connections.

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Capacitive Coupled Connector

This is a nonmechanical signal connector design which can be used for card-to-board, module-to-card, and cabling connections.

The connector comprises a through-hole plating 10 of a printed-circuit board, or any similar conductive cylinder, and a conductive pin 11 passing through the hole, spaced from the plating 10 by dielectric material 12 in the manner of a coaxial-like structure. The design utilizes the coupling capacitance between the plated through-hole 10 and the conductive pin 11, as a capacitive element in an electronic latch-type circuit.

The coupling capacitance of the coaxial like structure is a function of the dielectric material 12 separating the through-hole plating element 10 and the conductive pin element 11, the length of the conductors, and the ratio of the radii of the conductors. The response of this connector to a pulse consists of a positive voltage spike at the start of the input pulse and a negative voltage spike at the end of the input pulse. This high-pass connector circuit differentiates the input pulse.

The output of the connector is connected to a latch circuit 13.

The positive spike sets the latch 13 and the negative spike resets the latch. If no reset spike is present, the latch 13 will remain in a set condition.

The phase relationship of the input and output pulses of this connector can be selected depending upon the input of the latch circuit 13. For example, if input A is used, the output will be inve...