Method and apparatus with adaptive transponder plucking
First Claim
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1. A system with adaptive plucking, comprising:
- a resonant circuit operable to generate an oscillating signal;
a peak level detector operable to detect a peak level of said oscillating signal;
a comparator coupled to said peak level detector and operable to compare said peak level with a reference voltage; and
a switch coupled to said resonant circuit and said comparator, said switch operable to couple power to said resonant circuit under control of said comparator.
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Abstract
A method and apparatus with adaptive transponder plucking is provided in which oscillations from a resonant circuit (12 and 14) are maintained by coupling power from a capacitor (18) through a switch (26) to the resonant circuit (12 and 14). The switch (26) is controlled by adaptive pluck circuitry. The adaptive pluck circuitry includes peak level detector (22) and comparator (24). When the peak level of an oscillating signal from the resonant circuit (12 and 14) falls below a reference voltage, the switch (26) is activated to couple power to the resonant circuit (12 and 14).
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Citations
17 Claims
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1. A system with adaptive plucking, comprising:
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a resonant circuit operable to generate an oscillating signal; a peak level detector operable to detect a peak level of said oscillating signal; a comparator coupled to said peak level detector and operable to compare said peak level with a reference voltage; and a switch coupled to said resonant circuit and said comparator, said switch operable to couple power to said resonant circuit under control of said comparator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system with adaptive plucking, comprising:
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a resonant circuit operable to generate an oscillating signal; a peak level detector operable to detect a peak level of said oscillating signal; a comparator coupled to said peak level detector and operable to compare said peak level with a reference voltage; a counter operable to count cycles of said oscillating signal; and a switch coupled to said resonant circuit, said comparator, and said counter, said switch operable to couple power to said resonant circuit under control of said comparator and said counter. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of maintaining an oscillating signal with adaptive plucking, comprising:
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initiating the oscillating signal in a resonant circuit; detecting a peak level of the oscillating signal; comparing the peak level with a reference voltage; and coupling power to the resonant circuit in response to said step of comparing. - View Dependent Claims (14, 15, 16, 17)
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Specification