Clocked direct voltage converter
First Claim
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1. A clocked direct voltage converter comprising:
- an input terminal for connection to a source of voltage, a first output terminal at which is developed a controlled output voltage for a load, a second output terminal at which an uncontrolled voltage is developed by coupling to an inductor storage element in the converter, means connecting a controlled semiconductor switch and a base load resistor in series circuit between said first output terminal and a point of reference voltage, and a voltage threshold detector coupled to said second output terminal and to a control electrode of the semiconductor switch for selectively controlling the semiconductor switch into conduction when the uncontrolled voltage at the second output terminal drops below a threshold voltage value thereby to couple said base load resistor to said first output terminal.
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Abstract
A clocked direct voltage converter has a controlled output at which a controlled voltage is produced. The converter also produces an uncontrolled voltage at an uncontrolled output. The latter voltage, is obtained by coupling to one of the energy storage elements in the converter. In order to avoid the "idling"mode of operation in such a clocked direct voltage converter, a threshold value detector is provided which connects, through a switch, a base load to the controlled output when the uncontrolled voltage output falls below a given threshold.
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7 Claims
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1. A clocked direct voltage converter comprising:
- an input terminal for connection to a source of voltage, a first output terminal at which is developed a controlled output voltage for a load, a second output terminal at which an uncontrolled voltage is developed by coupling to an inductor storage element in the converter, means connecting a controlled semiconductor switch and a base load resistor in series circuit between said first output terminal and a point of reference voltage, and a voltage threshold detector coupled to said second output terminal and to a control electrode of the semiconductor switch for selectively controlling the semiconductor switch into conduction when the uncontrolled voltage at the second output terminal drops below a threshold voltage value thereby to couple said base load resistor to said first output terminal.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification