Switchable output voltage converter
First Claim
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1. An incrementally variable DC power supply, having a terminal adapted to selectively provide a regulated DC output voltage from a DC input voltage, comprising:
- control circuit means operatively connected to a reference voltage and to said DC input voltage, said control circuit means including means to control said regulated DC output voltage in response to any one of a plurality of values of said reference voltage;
output selection circuit means operatively connected to said reference voltage and to at least one of a plurality of digital logic inputs, having high and low levels said output selection circuit means including means to selectively alter the value of said reference voltage in response to said digital logic inputs, said reference voltage altering means being free of mechanical switching elements and comprising at least one switching transistor; and
means to selectively and alternatively engage and disengage any one of a plurality of electrical loads connected to said terminal, said selective engagement and disengagement means being simultaneously with the means to selectively alter the value of the reference voltage, responsive to changes in the logic level of said digital logic inputs.
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Abstract
A voltage converter having switchable output capability is provided. The voltage converter converts an unregulated voltage input to a regulated DC voltage output. The regulated DC output level is selectable by changing the logical status of at least one logic input to the voltage converter, thereby converting a single voltage source to one of at least two selectable DC voltage outputs.
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Citations
16 Claims
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1. An incrementally variable DC power supply, having a terminal adapted to selectively provide a regulated DC output voltage from a DC input voltage, comprising:
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control circuit means operatively connected to a reference voltage and to said DC input voltage, said control circuit means including means to control said regulated DC output voltage in response to any one of a plurality of values of said reference voltage; output selection circuit means operatively connected to said reference voltage and to at least one of a plurality of digital logic inputs, having high and low levels said output selection circuit means including means to selectively alter the value of said reference voltage in response to said digital logic inputs, said reference voltage altering means being free of mechanical switching elements and comprising at least one switching transistor; and means to selectively and alternatively engage and disengage any one of a plurality of electrical loads connected to said terminal, said selective engagement and disengagement means being simultaneously with the means to selectively alter the value of the reference voltage, responsive to changes in the logic level of said digital logic inputs. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12, 13)
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7. A method of selectively providing one of a plurality of regulated DC output voltages from an input voltage, comprising the steps of:
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providing a reference voltage; providing said input voltage; providing control circuit means operatively connected to said reference voltage and to said input voltage, said control circuit means including means to control said regulated DC output voltage in response to any one of a plurality of values of said reference voltage; providing output selection circuit means operatively connected to said reference voltage and to at least one of a plurality of digital logic inputs, having high and low levels said output selection circuit means including means to selectively alter the value of said reference voltage in response to said digital logic inputs, said reference voltage altering means being free of mechanical switching elements and comprising at least one switching transistor; selectively enabling at least one of said digital logic inputs to alter said value of said reference voltage; outputting one of said plurality of regulated DC output voltages; providing a plurality of electrical loads; and providing means to selectively and alternatively engage and disengage any one of said plurality of electrical loads simultaneously with the means to selectively alter the value of the reference voltage, in response to changes in the logic level of said digital logic inputs. - View Dependent Claims (8, 9, 10, 14, 15, 16)
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Specification