DYNAMICALLY ADJUSTABLE Q-FACTORS
First Claim
1. A mobile communication device, comprising:
- a resonant circuit having an adjustable q-factor, wherein the resonant circuit is adapted to pass a resonant frequency component and attenuate a non-resonant frequency component; and
a non-resonant frequency component detector adapted to compare the non-resonant frequency component to a threshold, and further adapted to provide feedback to the resonant circuit to dynamically adjust the q-factor based on the threshold comparison.
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Accused Products
Abstract
One embodiment relates to a circuit for active loss compensation. The circuit includes a parallel inductor-capacitive (LC) tank circuit having a first single-ended output. A first adjustable capacitor, which includes a first terminal and a second terminal, is coupled to the first single-ended output. The circuit also includes a first pair of transistors having sources coupled to a first common node. One transistor of the first pair of transistors has a drain coupled to the first single-ended output and the other transistor of the first pair of transistors has a gate coupled to the second terminal of the first adjustable capacitor. Other embodiments are also disclosed.
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Citations
20 Claims
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1. A mobile communication device, comprising:
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a resonant circuit having an adjustable q-factor, wherein the resonant circuit is adapted to pass a resonant frequency component and attenuate a non-resonant frequency component; and a non-resonant frequency component detector adapted to compare the non-resonant frequency component to a threshold, and further adapted to provide feedback to the resonant circuit to dynamically adjust the q-factor based on the threshold comparison. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A circuit with an adjustable Q-factor, comprising:
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a parallel inductor-capacitive (LC) tank circuit having a first single-ended output; a first adjustable capacitor having a first terminal and a second terminal, where the first terminal is coupled to the first single-ended output; and a first pair of transistors having sources coupled to a first common node, wherein one transistor M1 of the first pair of transistors has a drain coupled to the first single-ended output and another transistor M2 of the first pair of transistors has a gate coupled to the second terminal of the first adjustable capacitor. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for Q-factor adjustment, comprising:
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providing a radio frequency (RF) signal to a resonant circuit having an adjustable Q-factor, where the RF signal includes a wanted frequency component and an unwanted frequency component; processing the RF signal to attenuate the unwanted frequency component, thereby generating a processed RF signal; comparing the unwanted frequency component in the processed RF signal to a threshold; and adjusting the Q-factor of the resonant circuit based on the comparison to alter the unwanted frequency component in the processed RF signal. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A mobile communication device, comprising:
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a resonant circuit having an dynamically adjustable q-factor, wherein the resonant circuit is adapted to pass a wanted frequency component and attenuate a unwanted frequency component; and means for adjusting the Q-factor of the resonant circuit based on a comparison of the unwanted frequency component to a threshold. - View Dependent Claims (20)
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Specification