LOW POWER SUPPLY MAINTAINING CIRCUIT
First Claim
1. A circuit comprising:
- a load that is arranged and configured to enter a low power mode;
a capacitor that is operably coupled to the load and that is arranged and configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode;
a finite state machine that is arranged and configured to receive a clock signal and to duty cycle on a periodic basis based on the clock signal and to enable a power-up signal on the periodic basis; and
a low-dropout voltage regulator that is operably coupled to the finite state machine and to the capacitor and that is arranged and configured to;
receive the power-up signal from the finite state machine,power on in response to receiving the power-up signal,provide a voltage upon power on to the capacitor, andregulate the voltage to charge the capacitor.
4 Assignments
0 Petitions
Accused Products
Abstract
A circuit may include a load that is configured to enter a low power mode, a capacitor that is operably coupled to the load and that is configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode, a finite state machine that is configured to receive a clock signal and to duty cycle on a periodic basis based on the clock signal and to enable a power-up signal on the periodic basis, and a low-dropout voltage regulator that is operably coupled to the finite state machine and to the capacitor and that is configured to receive the power-up signal from the finite state machine, to power on in response to receiving the power-up signal, to provide a voltage upon power on to the capacitor, and to regulate the voltage to charge the capacitor.
17 Citations
20 Claims
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1. A circuit comprising:
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a load that is arranged and configured to enter a low power mode; a capacitor that is operably coupled to the load and that is arranged and configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode; a finite state machine that is arranged and configured to receive a clock signal and to duty cycle on a periodic basis based on the clock signal and to enable a power-up signal on the periodic basis; and a low-dropout voltage regulator that is operably coupled to the finite state machine and to the capacitor and that is arranged and configured to; receive the power-up signal from the finite state machine, power on in response to receiving the power-up signal, provide a voltage upon power on to the capacitor, and regulate the voltage to charge the capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit comprising:
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a load that is arranged and configured to enter a low power mode; a capacitor that is operably coupled to the load and that is arranged and configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode; a sensor module that is operably coupled to the capacitor and that is arranged and configured to; sense when a voltage in the capacitor is low and to enable a power-up signal, and sense when the voltage in the capacitor in charged and to disable the power-up signal; and a low-dropout voltage regulator that is operably coupled to the sensor module and to the capacitor and that is arranged and configured to; receive the power-up signal from the sensor module, power on in response to receiving the power-up signal, provide a voltage upon power on to the capacitor, and regulate the voltage to a desired level to charge the capacitor. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A circuit comprising:
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a load that is arranged and configured to enter a low power mode; a first capacitor that is operably coupled to the load and that is arranged and configured to provide a minimum voltage and current for the load to maintain its state while in the low power mode; a band gap reference module that is arranged and configured to receive a clock signal and to provide a low voltage reference and a high voltage reference; a first comparator that is operably coupled to the band gap reference module and to the first capacitor and that is arranged and configured to sense a voltage of the first capacitor and to turn on when the voltage of the first capacitor reaches the low voltage reference; a second comparator that is operably coupled to the band gap reference module and to the first capacitor and that is arranged and configured to sense the voltage of the first capacitor and to turn on when the voltage of the first capacitor reaches the high voltage reference; a flip-flop, wherein; a reset input of the flip-flop is operably coupled to an output of the first comparator, and a clock input of the flip-flop is operably coupled to the second comparator, and a field effect transistor (FET) that is operably coupled to the flip-flop and to the first capacitor and that is arranged and configured to charge the first capacitor when the first comparator is turned on and to stop charging the first capacitor when the second comparator is turned on. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification