SAMPLING
First Claim
1. Integrated circuitry, comprising:
- a sampling terminal for connecting the integrated circuitry to an external capacitance;
sampling means operatively connected to the terminal to take samples, each sample having a sample value; and
control means configured, whilst said external capacitance is connected to the sampling terminal, to;
internally connect the sampling terminal, or another terminal of the integrated circuitry to which the external capacitance is also connected, to a given voltage-potential source to effect a change in charge stored on the external capacitance, the given voltage-potential source being available within the integrated circuitry when it is in use;
cause the sampling means to take a plurality of samples over a period whilst that external capacitance charges or discharges following and/or during said change in charge; and
judge whether an event has occurred in dependence upon the plurality of samples.
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Accused Products
Abstract
Integrated circuitry, comprising: a sampling terminal for connecting the integrated circuitry to an external capacitance; sampling means operatively connected to the terminal to take samples, each sample having a sample value; and control means configured, whilst said external capacitance is connected to the sampling terminal, to: internally connect the sampling terminal, or another terminal of the integrated circuitry to which the external capacitance is also connected, to a given voltage-potential source to effect a change in charge stored on the external capacitance, the given voltage-potential source being available within the integrated circuitry when it is in use; cause the sampling means to take a plurality of samples over a period whilst that external capacitance charges or discharges following and/or during said change in charge; and judge whether an event has occurred in dependence upon the plurality of samples.
73 Citations
17 Claims
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1. Integrated circuitry, comprising:
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a sampling terminal for connecting the integrated circuitry to an external capacitance; sampling means operatively connected to the terminal to take samples, each sample having a sample value; and control means configured, whilst said external capacitance is connected to the sampling terminal, to; internally connect the sampling terminal, or another terminal of the integrated circuitry to which the external capacitance is also connected, to a given voltage-potential source to effect a change in charge stored on the external capacitance, the given voltage-potential source being available within the integrated circuitry when it is in use; cause the sampling means to take a plurality of samples over a period whilst that external capacitance charges or discharges following and/or during said change in charge; and judge whether an event has occurred in dependence upon the plurality of samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16)
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15. A computer program which, when executed on integrated circuitry comprising a sampling terminal for connecting the integrated circuitry to an external capacitance and sampling means operatively connected to the terminal to take samples each having a sample value, causes the integrated circuitry, whilst said external capacitance is connected to the sampling terminal, to:
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internally connect the sampling terminal, or another terminal of the integrated circuitry to which the external capacitance is also connected, to a given voltage-potential source to effect a change in charge stored on the external capacitance, the given voltage-potential source being available within the integrated circuitry when it is in use; cause the sampling means to take a plurality of samples over a period whilst that external capacitance charges or discharges following and/or during said change in charge; and judge whether an event has occurred in dependence upon the plurality of samples.
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17. Integrated circuitry, comprising:
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a sampling terminal for connecting the integrated circuitry to an external capacitance; sampler operatively connected to the terminal to take samples, each sample having a sample value; and controller configured, whilst said external capacitance is connected to the sampling terminal, to; internally connect the sampling terminal, or another terminal of the integrated circuitry to which the external capacitance is also connected, to a given voltage-potential source to effect a change in charge stored on the external capacitance, the given voltage-potential source being available within the integrated circuitry when it is in use; cause the sampler to take a plurality of samples over a period whilst that external capacitance charges or discharges following and/or during said change in charge; and judge whether an event has occurred in dependence upon the plurality of samples.
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Specification