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Digital Transmission Line with Single-Ended Wiring

IP.com Disclosure Number: IPCOM000210086D
Publication Date: 2011-Aug-25
Document File: 2 page(s) / 33K

Publishing Venue

The IP.com Prior Art Database

Abstract

This technical disclosure provides a solution for transmitting digital signals over long distances for use in the Universal Serial Ethernet Interface for Transducers (USEIT). A digital transducer bus system allows collecting data from several transducers based on a sequential, serial approach. The transducers may be used in instrumentation for aircraft wind tunnel models.

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Title/

Abstract/

This technical disclosure provides a solution for transmitting digital signals over long distances for use in the Universal Serial Ethernet Interface for Transducers (USEIT). A digital transducer bus system allows collecting data from several transducers based on a sequential, serial approach. The transducers may be used in instrumentation for aircraft wind tunnel models.

Disclosure/

The present technical disclosure defines a digital transmission line with the following characteristics:


1. It is capable of transporting digital signals across long distances (several meters);


2. It uses single-ended wiring rather than the usual differential wiring;


3. It permits the interconnection of several devices in a bus topology rather than in the traditional star or point-to-point structure.

Essentially, the digital transmission line (DTL) consists of a set of wires and electronic components that are selected to minimize the typical problems that arise while transmitting high frequency analogue signals over long distances. The main problems faced are signal reflexions, crosstalk, ground bounce, and electromagnetic induction, amongst others. To reduce each of these problems to a functional minimum, several well-known corrective measures are applied.

In contrast to common industry standards, the proposed transmission line uses single-ended wiring rather than differential wiring, reducing the complexity of the interface "device output - DTL" for transmitting transistor-transistor logic(TTL)-conforming digital signals. Differential wiring requires the conversion from differential voltages to signal referenced (grounded) voltages common in TTL. The DLT works directly with TTL signals.

DTL is modularly designed. It defi...