Transformerless hybrid circuit having direct powered line-side amplifiers
A telephone line-powered Data Access Arrangement (10) has amplifiers (15,27) therein directly powered from the telephone line without voltage regulators or filters. The amplifiers, such as the amplifier (15) driving an LED (40) in an optical coupler (14), draw a constant power supply current indepen...
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Main Authors | , |
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Format | Patent |
Language | English French German |
Published |
22.04.1998
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | A telephone line-powered Data Access Arrangement (10) has amplifiers (15,27) therein directly powered from the telephone line without voltage regulators or filters. The amplifiers, such as the amplifier (15) driving an LED (40) in an optical coupler (14), draw a constant power supply current independent of the signal being amplified. Thus, amplified signals are not coupled back onto the telephone line. |
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Bibliography: | Application Number: EP19950304536 |