State-dependent capacitance estimation
First Claim
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1. A method for determining a circuit state for a circuit, comprising:
- determining a capacitance of the circuit for each one of a plurality of circuit states;
selecting one of the circuit states corresponding to a lowest one of the determined capacitances; and
placing the circuit in the selected circuit state while powering up the circuit by connecting the circuit to a power supply with a power switch;
wherein the circuit comprises a plurality of input drivers, and the method further comprises determining a combination of input logic states for the inputs that places the circuit in the selected circuit state using the input drivers.
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Abstract
Techniques for estimating state-dependent capacitance of a circuit are described herein. In one embodiment, a method for determining a circuit state for a circuit comprises determining a capacitance of the circuit for each one of a plurality of circuit states, and selecting one of the circuit states based on the determined capacitances.
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Citations
14 Claims
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1. A method for determining a circuit state for a circuit, comprising:
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determining a capacitance of the circuit for each one of a plurality of circuit states; selecting one of the circuit states corresponding to a lowest one of the determined capacitances; and placing the circuit in the selected circuit state while powering up the circuit by connecting the circuit to a power supply with a power switch; wherein the circuit comprises a plurality of input drivers, and the method further comprises determining a combination of input logic states for the inputs that places the circuit in the selected circuit state using the input drivers. - View Dependent Claims (2, 3, 4)
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5. An apparatus for placing a circuit in a circuit state, wherein the circuit comprises a plurality of inputs, the apparatus comprising:
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a plurality of input drivers, wherein each of the input drivers is configured to drive a respective one of the plurality of inputs of the circuit; and an input controller configured to control the plurality of input drivers such that, during power up of the circuit, the input drivers drive the plurality of inputs according to a combination of input logic states that places the circuit in the circuit state; wherein the circuit state is a selected one of a plurality of circuit states corresponding to a plurality of different capacitances of the circuit, and the selected circuit state corresponds to a lowest one of the plurality of different capacitances. - View Dependent Claims (6, 7, 8)
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9. A method for powering up a circuit, comprising:
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placing the circuit in a circuit state, wherein the circuit state is one of a plurality of circuit states corresponding to a plurality of different capacitances, and the circuit state corresponds to a lowest one of the plurality of capacitances; and powering up the circuit by connecting the circuit to a power supply with a power switch while the circuit is in the circuit state; wherein the circuit comprises a plurality of input drivers, and the method further comprises determining a combination of input logic states for the inputs that places the circuit in the selected circuit state using the input drivers. - View Dependent Claims (10, 11)
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12. An apparatus for powering up a circuit, comprising:
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means for placing the circuit in a circuit state, wherein the circuit state is one of a plurality of circuit states corresponding to a plurality of different capacitances, and the circuit state corresponds to a lowest one of the plurality of capacitances; and means for powering up the circuit by connecting the circuit to a power supply with a power switch while the circuit is in the circuit state; wherein the means for placing the circuit in the circuit state comprises means for driving a plurality of input drivers of the circuit according to a combination of input logic states that places the circuit in the circuit state with the plurality of input drivers. - View Dependent Claims (13, 14)
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Specification