Voltage regulator including an output unit for converting input voltage into a predetermined voltage and for outputting the converted voltage
AssigneeRicoh Company, Ltd.
InventorHideki Agari
Life of this patent
Estimating the term…
Abstract
A voltage regulator is disclosed. The voltage regulator includes an output unit for converting an input voltage provided by a power source into a predetermined voltage, and for outputting the converted voltage, a monitoring unit for determining whether the input voltage provided by the power source is greater than a reference voltage, and a step-up unit for stepping up the input voltage provided by the power source if the monitoring unit determines that the input voltage is less than the reference voltage. The output unit includes a converting unit for converting the stepped-up voltage into the predetermined voltage.
Claims6
A voltage regulator that includes an output unit for converting an input voltage provided by a power source into a predetermined voltage, and for outputting the converted voltage, comprising:
- a monitoring unit for determining whether the input voltage provided by the power source is greater than a reference voltage;
- and
- a step-up unit for stepping up the input voltage provided by the power source if the monitoring unit determines that the input voltage is less than the reference voltage;
- wherein the output unit includes
- a converting unit for converting the stepped-up voltage into the predetermined voltage,
- wherein the monitoring unit includes:
- a reference voltage generating unit for generating the reference voltage;
- a comparing unit for comparing the input voltage with the reference voltage, and for providing a signal that turns the step-up unit on if the monitoring unit determines that the input voltage is less than the reference voltage;
- and
- a voltage dividing unit for dividing the input voltage provided to the comparing unit from the power source, and
- wherein the voltage dividing unit includes a plurality of resistors between an output terminal and an inverting input terminal of the comparing unit such that hysteresis is provided to the comparing unit.
A voltage regulator that includes an output unit for converting an input voltage provided by a power source into a predetermined voltage, and for outputting the converted voltage, comprising:
- a monitoring unit for determining whether the input voltage provided by the power source is greater than a voltage defined based on an output voltage;
- and
- a step-up unit for stepping up the input voltage provided by the power source if the monitoring unit determines that the input voltage is less than the voltage defined based on the output voltage;
- wherein the output unit includes a converting unit for converting the stepped-up voltage into the predetermined voltage,
- wherein the monitoring unit includes:
- a reference voltage generating unit for generating the voltage defined based on the output voltage;
- a comparing unit for comparing the input voltage with the voltage defined based on the output voltage, and for providing a signal that turns the step-up unit on if the monitoring unit determines that the input voltaae is less than the voltage defined based on the output voltage;
- and
- a voltage dividing unit for dividing the input voltage provided to the comparing unit from the power source, and
- wherein the voltage dividing unit includes a plurality of resistors between an output terminal and an inverting input terminal of the comparing unit such that hysteresis is provided to the comparing unit.
Dependencies are inferred from the claim text.