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The distributed power architecture for the System 75 Digital Communications System offers performance that would be difficult to achieve with conventional power architectures. With distributed power, each circuit-card shelf is powered by its own off-line switcher (OLS) power units. This limits the effects of a power-unit failure and contributes to increased system reliability. An optional battery...
For critical electronic equipment applications such as PBXs (Private Branch Exchanges), system reliability is as important an index of performance as equipment first cost. To minimize the effects of power failures on overall reliability, duplicate systems may be used to power the same loads. However, in today's tight economy, such redundant configurations are often not a cost-effective alternative...
With the evolution of TD-2 Radio into a completely solid-state system, a new powering arrangement was introduced to reduce power plant maintenance and battery replacement costs, to lower energy costs, and to allow recovery of floor space in existing repeater stations, a factor vital to radio overbuild* programs.
Applications and implementations of small nonmagnetic dc-to-dc converter circuits realizable as hybrid integrated circuits are reviewed. In low power applications these converters offer smaller size, lower cost, and less complexity than more traditional converters using magnetic energy storage elements. In addition, when used as on-board power units, these converters can be turned on and off in response...
A familiar power inverter circuit, combined with a ferroresonant transformer and a simple control circuit, provides the basis for an economically attractive modular family of DC to DC converters. The circuit is readily adaptable to a wide range of input voltages and single or multiple output voltages.
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