Browse Prior Art Database

Differential Current Switch Data Interface to an EDA Driven Bipolar Embedded Array

IP.com Disclosure Number: IPCOM000115573D
Original Publication Date: 1995-May-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 4 page(s) / 94K

Publishing Venue

IBM

Related People

Holt, J: AUTHOR [+4]

Abstract

Differential Current Switch Data Interface to an EDA Driven Bipolar Embedded Array

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Differential Current Switch Data Interface to an EDA Driven Bipolar
Embedded Array

      Differential Current Switch Data Interface to an EDA Driven
Bipolar Embedded Array

      Disclosed is a method whereby EDA driven bipolar embedded
arrays, had Differential Current Switch (DCS) data input and output
stages integrated into its circuitry to vastly improve the system's
design ability, improving the overall performance, and proving to be
essential to the development of the advanced high end, air cooled
Thermal Conduction Module (TCM), system.

      Due to the low power limitations of air cooled systems,
designers are forced to use low power dissipating, DCS type logic as
much as possible, in order to minimize a system's overall power
dissipation, while still maintaining a relatively high level of
performance.  Typically, very high performance Emitter Coupled Logic
(ECL) circuitry dissipates far too much power for designers to use
throughout their air cooled systems.  The designers do use the higher
power ECL circuits sporadically, where capacitive loads are very
high, and the ECL power is therefore used economically.  As a result,
the system's efficiency is maintained and the overall power
dissipations are kept at a reasonable level.

      Historically, bipolar embedded arrays were only available for
system design with ECL I/Os.  Using embedded arrays designed in this
manner, in low power, air cooled TCM systems, impacted efficient
design.

      In the standard convention of air cooled TCM system design, the
designs using embedded arrays have address lines connected directly
from off chip and usually have the "data-in" logic signals, generated
on chip, and then receive the "data-out" signals on chip as well.
Since the traditional signal interface was in ECL levels, the system
designs had to have level convert circuits added in series with the
data I/Os, to convert these signals to the appropriate DCS levels as
required in the des...