Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1993-12-06
1994-10-04
Stephan, Steven L.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 67, 323281, 323267, 378190, 315411, H02M 723, H01J 2970, H04N 563
Patent
active
053532155
ABSTRACT:
A power supply for a television apparatus, comprises a first source of unregulated DO run voltage operable only in a run mode of operation and a second source of unregulated DO voltage operable in a standby mode and in the run mode of operation. A first regulator responsive to the first source unregulated DO run voltage produces a first regulated voltage. A second regulator responsive to the second source of unregulated DO voltage produces a second regulated voltage. First and second integrated circuits are energized respectively by the first and second regulated voltages. At least one of the integrated circuits has a signal output coupled to a signal input of the other of the integrated circuits. A controller is operable in the run mode and responsive to variations of one of the regulated voltages for adjusting the other of the regulated voltages to follow the variations. Each of the regulators may comprise a series pass transistor and a control transistor coupled to a base of the series pass transistor. Each of the control transistors provides a control current. The controller can be responsive to both control currents for adjusting the regulated voltages to track one another. The control circuit may sum the control currents.
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Dinwiddie Aaron H.
Testin William J.
Berhane Adolf
Fried Harvey D.
Laks Joseph J.
Stephan Steven L.
Thomson Consumer Electronics Inc.
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