On chip multiple voltage generation using a charge pump and plural feedback sense circuits
First Claim
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1. An on-chip multi-level voltage generating system comprising:
- a charge pump circuit means having at least one drive input connected to a low voltage power supply and having an output for supplying multiple voltages;
a plurality of selectable feedback paths connected to the output of said charge pump circuit means with each feedback path controlling the charge pump circuit means to output a selected voltage level; and
a control means coupled to a drive input of the charge pump and in series with each feedback path;
said control means responsive to enabling signals to activate the feedback path corresponding to the selected voltage level.
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Abstract
A level selectable FET voltage generation system is described. The system includes a single charge pump controlled by multiple feedback paths and a powerdown circuit. Each feedback path contains a capacitor divider network, a sense amplifier with a compensating voltage reference and a timer which periodically resets the capacitor divider network to insure sensing accuracy. The powerdown circuit and a selected feedback path provides a desired voltage level at the output of the charge pump.
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Citations
8 Claims
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1. An on-chip multi-level voltage generating system comprising:
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a charge pump circuit means having at least one drive input connected to a low voltage power supply and having an output for supplying multiple voltages; a plurality of selectable feedback paths connected to the output of said charge pump circuit means with each feedback path controlling the charge pump circuit means to output a selected voltage level; and a control means coupled to a drive input of the charge pump and in series with each feedback path;
said control means responsive to enabling signals to activate the feedback path corresponding to the selected voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification