Charge Pump Circuit
First Claim
1. A charge pump circuit comprising:
- a plurality of charge pump units each including a capacitor and connected to each other in parallel;
a current source connected to commonly connected power source terminals of the plurality of charge pump units; and
a control circuit connected to commonly connected output terminals of the plurality of charge pump units, wherein the control circuit controls an amount of a current to be supplied by the current source to the commonly connected power source terminals based on an output signal at the output terminals from the plurality of charge pump units.
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Accused Products
Abstract
A charge pump circuit according to the present invention includes a plurality of charge pump units each including a capacitor and connected to each other in parallel; a current source connected to commonly connected power source terminals of the plurality of charge pump units; and a control circuit connected to commonly connected output terminals and controlling an amount of a current to be supplied by the current source to the commonly connected power source terminals based on an output signal at the output terminals output signal from the plurality of charge pump units. Always in at least one charge pump unit, a current from the current source via the power source terminal is supplied to the capacitor. A spike noise due to a change in current is not generated and characteristics degradation of the other circuit can be prevented.
9 Citations
12 Claims
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1. A charge pump circuit comprising:
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a plurality of charge pump units each including a capacitor and connected to each other in parallel; a current source connected to commonly connected power source terminals of the plurality of charge pump units; and a control circuit connected to commonly connected output terminals of the plurality of charge pump units, wherein the control circuit controls an amount of a current to be supplied by the current source to the commonly connected power source terminals based on an output signal at the output terminals from the plurality of charge pump units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification