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Voltage Compensation Method for Several Hundred Products in an Ess Chamber

IP.com Disclosure Number: IPCOM000118121D
Original Publication Date: 1996-Sep-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Gura, GA: AUTHOR

Abstract

Disclosed is a system for improving voltage regulation in an environmental stress screening chamber. The system employs closed loop feedback of the voltage signals from each and every Product Carrier Adapter (PCA) in the stress chamber to assist with minimizing the effect of line losses in the PCA voltage distribution cable harness (3).

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Voltage Compensation Method for Several Hundred Products in an Ess
Chamber

      Disclosed is a system for improving voltage regulation in an
environmental stress screening chamber.  The system employs closed
loop feedback of the voltage signals from each and every Product
Carrier Adapter (PCA) in the stress chamber to assist with minimizing
the effect of line losses in the PCA voltage distribution cable
harness (3).

      In a standard Direct Current (DC) power distribution system,
voltages are routed from the power supply rack (1) to a bus bar (2).
From the bus bar the voltages are individually routed through a
cable harness (3) to product carrier adapters (4) which house
electronic card assemblies.  Power supply sense lines (5) are also
routed to the bus bar.

      A new feature provides feedback of the voltages from the
product carrier adapter to a digital volt meter (6).  The voltage
information is then fed to a computer where it is analyzed and
processed into a revised output setting to the power supply.  The net
effect of this feedback loop is to compensate for voltage drops in
the PCA voltage  distribution cable harness (3).