Step-up circuits
AssigneeSeiko Epson Corporation
InventorSatoru Ito
Life of this patent
Estimating the term…
Abstract
A step-up circuit is equipped with a step-up clock signal generation device that generates a clock signal to be used for stepping up voltage, a plurality of step-up stages for successively stepping up a power supply voltage based on the clock signal, and control devices that controls, after starting an operation, the stepped up clock signal generated by the step-up clock signal generation device to be supplied to the plurality of step-up stages at different timings.
Claims30
A step-up circuit, comprising:
- a step-up clock signal generation device that generates a clock signal to be used for voltage step-up;
- a plurality of step-up stages for successively stepping up a power supply voltage based on the clock signal;
- and
- a control device that controls, after starting an operation, the clock signal generated by the step-up clock signal generation device to be supplied to the plurality of step-up stages at different timings.
A step-up circuit, comprising:
- a step-up clock signal generation circuit that generates a clock signal to be used for voltage step-up;
- a plurality of step-up stages that successively step up a power supply voltage based on the clock signal;
- and
- a control device that, after a start of operation, activates the plurality of step-up stages at different timings.
A step-up circuit, comprising:
- a step-up clock signal generation device that generates a clock signal to be used for voltage step-up;
- at least one step-up stage that steps up a power supply voltage based on the clock signal;
- and
- a control device that, after starting an operation, changes a frequency of the clock signal to be supplied to the step-up stage from a value lower than a normal value to the normal value.
A step-up circuit, comprising:
- means for generating a step-up clock signal to be used for voltage step-up;
- means for successively stepping up a power supply voltage based on the clock signal;
- and
- means for controlling, after starting an operation, the clock signal generated by the means for generating a step-up clock signal to be supplied to the means for successively stepping up at different timings.
A step-up circuit, comprising:
- means for generating a step-up clock signal to be used for voltage step-up;
- means for successively stepping up a power supply voltage based on the clock signal;
- and
- means for controlling that, after a start of operation, activates the means for successively stepping up at different timings.
A step-up circuit, comprising:
- means for generating a step-up clock signal to be used for voltage step-up;
- means for successively stepping up a power supply voltage based on the clock signal;
- and
- a means for controlling that, after starting an operation, changes a frequency of the clock signal to be supplied to the means for successively stepping up from a value lower than a normal value to the normal value.
A method of operating a step-up circuit, comprising:
- generating a step-up clock signal to be used for voltage step-up;
- successively stepping up a power supply voltage based on the clock signal;
- and
- controlling, after starting an operation, the clock signal generated at different timings.
A method of operating a step-up circuit, comprising:
- generating a step-up clock signal to be used for voltage step-up;
- successively stepping up a power supply voltage based on the clock signal;
- and
- after a start of operation, successively stepping up at different timings.
A method of operating a step-up circuit, comprising:
- generating a step-up clock signal to be used for voltage step-up;
- successively stepping up a power supply voltage based on the clock signal;
- and
- changing, after starting an operation, a frequency of the clock signal to be supplied to the successively stepping up from a value lower than a normal value to the normal value.
Dependencies are inferred from the claim text.