DEVICES HAVING DIFFERENT EFFECTIVE SERIES RESISTANCE STATES AND METHODS FOR CONTROLLING SUCH DEVICES
First Claim
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1. A device, comprising:
- a first pathway comprising a first effective series resistance and a first capacitance, coupled between a first power supply and a second power supply;
a second pathway comprising a second effective series resistance and a second capacitance, the second pathway coupled in parallel to the first pathway between the first power supply and the second power supply, wherein the second effective series resistance is switchable between a higher resistance state and a lower resistance state;
a circuit to switch the second effective series resistance to the lower resistance state during a portion of a signal, and to switch the second effective series resistance to the higher resistance state during another portion of the signal.
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Abstract
Devices and methods are described, such as those including parallel paths coupled between a first power supply and a second power supply. The parallel paths include different values of capacitance to reduce unwanted variations as a function of current demand frequency such as resonance. A selectable resistance is provided along one or more parallel paths, and can be varied during different times in a signal burst.
13 Citations
24 Claims
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1. A device, comprising:
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a first pathway comprising a first effective series resistance and a first capacitance, coupled between a first power supply and a second power supply; a second pathway comprising a second effective series resistance and a second capacitance, the second pathway coupled in parallel to the first pathway between the first power supply and the second power supply, wherein the second effective series resistance is switchable between a higher resistance state and a lower resistance state; a circuit to switch the second effective series resistance to the lower resistance state during a portion of a signal, and to switch the second effective series resistance to the higher resistance state during another portion of the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device, comprising:
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a first pathway comprising a first effective series resistance and a first capacitance, coupled between a first power supply and a second power supply; a second pathway having a second effective series resistance higher than the first effective series resistance and a second capacitance higher than the first capacitance, the second pathway coupled in parallel with the first pathway between the first power supply and the second power supply; a third pathway comprising a third effective series resistance higher than the first effective series resistance and lower than the second effective series resistance and a third capacitance higher than the first capacitance, the third pathway coupled in parallel with the first pathway between the first power supply and the second power supply; a circuit to activate the third pathway during a portion of a signal, and to activate the second pathway during another portion of the signal. - View Dependent Claims (10, 11, 12)
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13. A method of providing power to a device having a pathway coupled between a first power supply and a second power supply, wherein the pathway has a first effective series resistance (ESR) state and a second ESR state, the method comprising:
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putting the pathway in the first ESR state during a portion of a signal; and putting the pathway in the second ESR state during another portion of the signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of providing power to a device having first and second pathways coupled between a first power supply and a second power supply, wherein the first pathway has a first ESR and the second pathway has a second ESR, the method comprising:
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activating the first pathway during a portion of a signal; and activating the second pathway during another portion of the signal. - View Dependent Claims (22, 23, 24)
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Specification