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US 2013/0093245 A1Published application
Method to maintain power supply voltage during brownout
AssigneeTexas Instruments Incorporated
InventorSudhir K. Madan
Life of this patent
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Abstract
A method of maintaining a power supply voltage during a brownout is disclosed. The method includes the step of storing a charge in a charge reservoir (608) and storing a charge on a power supply capacitor (832). A charge from the charge reservoir is applied to the power supply capacitor in response to a power supply fail signal (BROWNOUT).
Claims20
A method of maintaining a power supply voltage, comprising:
- storing a charge in a charge reservoir;
- storing a charge on a power supply capacitor:
- receiving a power supply fail signal;
- and
- applying charge from the charge reservoir to the power supply capacitor in response to the power supply fail signal.
2 more elements
A method of maintaining a power supply voltage, comprising:
- storing a separate charge on each of a plurality of capacitors;
- storing a charge on a power supply capacitor;
- receiving a power supply fail signal;
- receiving a control signal;
- and
- sequentially applying charge from each capacitor of the plurality of capacitors to the power supply capacitor in response to the power supply fail signal and the control signal.
3 more elements
A power supply circuit, comprising:
- a power supply terminal;
- a power supply capacitor:
- a first transistor coupled between the power supply terminal and the power supply capacitor, the first transistor having a control terminal coupled to receive a power fail signal;
- and
- a plurality of pump circuits coupled to the power supply capacitor, each pump circuit coupled to receive a respective first control signal.
2 more elements
Dependencies are inferred from the claim text.