AMPLITUDE MODULATION CIRCUIT AND NON-CONTACT POWER FEEDING DEVICE
First Claim
1. An amplitude modulation circuit, comprising:
- a resonance circuit powered by an oscillator and comprising a power transmission coil with a first coil portion, a second coil portion, a modulation coil, and a resonance condenser; and
a switch that switches between a state where the first coil portion and the second coil portion are connected in series and a state where the first coil portion and the modulation coil are connected in series according to a level switching timing of transmission data and a timing when a coil current in the resonance circuit becomes zero,wherein a combined inductance of the first coil portion and the second coil portion connected in series and a combined inductance of the first coil portion and the modulation coil connected in series are equal.
1 Assignment
0 Petitions
Accused Products
Abstract
An amplitude modulation circuit includes a resonance circuit powered by an oscillator and comprising a power transmission coil with a first coil portion, a second coil portion, a modulation coil, and a resonance condenser; and a switch that switches between a state where the first coil portion and the second coil portion are connected in series and a state where the first coil portion and the modulation coil are connected in series according to a level switching timing of transmission data and a timing when a coil current in the resonance circuit becomes zero. The combined inductance of the first coil portion and the second coil portion connected in series and a combined inductance of the first coil portion and the modulation coil connected in series are equal.
5 Citations
20 Claims
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1. An amplitude modulation circuit, comprising:
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a resonance circuit powered by an oscillator and comprising a power transmission coil with a first coil portion, a second coil portion, a modulation coil, and a resonance condenser; and a switch that switches between a state where the first coil portion and the second coil portion are connected in series and a state where the first coil portion and the modulation coil are connected in series according to a level switching timing of transmission data and a timing when a coil current in the resonance circuit becomes zero, wherein a combined inductance of the first coil portion and the second coil portion connected in series and a combined inductance of the first coil portion and the modulation coil connected in series are equal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification