Signal modulation method and signal rectification and modulation device
First Claim
1. A signal modulation method for a receiving-end module of an induction type power supply system, the signal modulation method comprising:
- configuring a plurality of modulation periods corresponding to a modulation signal;
comparing a voltage on a first terminal or a second terminal of an induction coil of the receiving-end module with a reference voltage, to generate a comparison result; and
determining time points where the plurality of modulation periods start or stop according to the comparison result;
wherein each of the plurality of modulation periods starts when the first terminal of the induction coil is at a first voltage level and ends when the first terminal of the induction coil is at the first voltage level wherein the voltage on the first terminal of the induction coil is compared with the reference voltage, and the step of determining the time points where the plurality of modulation periods start or stop according to the comparison result comprises;
configuring a predetermined time corresponding to each of the plurality of modulation periods;
determining a voltage level of the first terminal of the induction coil according to the comparison result and determining whether to start a modulation period corresponding to the first terminal among the plurality of modulation periods accordingly, when an indication of signal modulation is received;
starting a timer when the modulation period starts; and
determining the voltage level of the first terminal of the induction coil according to the comparison result and determining whether to stop the modulation period accordingly, when the timer expires on the predetermine time.
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Accused Products
Abstract
A signal modulation method for a receiving-end module of an induction type power supply system includes configuring a plurality of modulation periods corresponding to a modulation signal; performing modulation on a first terminal of an induction coil of the receiving-end module during the ith modulation period among the plurality of modulation periods, wherein i is an odd number; and performing modulation on a second terminal of the induction coil of the receiving-end module during the jth modulation period among the plurality of modulation periods, wherein j is an even number; wherein the second terminal does not undergo modulation when the first terminal is being modulated, and the first terminal does not undergo modulation when the second terminal is being modulated.
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Citations
10 Claims
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1. A signal modulation method for a receiving-end module of an induction type power supply system, the signal modulation method comprising:
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configuring a plurality of modulation periods corresponding to a modulation signal; comparing a voltage on a first terminal or a second terminal of an induction coil of the receiving-end module with a reference voltage, to generate a comparison result; and determining time points where the plurality of modulation periods start or stop according to the comparison result; wherein each of the plurality of modulation periods starts when the first terminal of the induction coil is at a first voltage level and ends when the first terminal of the induction coil is at the first voltage level wherein the voltage on the first terminal of the induction coil is compared with the reference voltage, and the step of determining the time points where the plurality of modulation periods start or stop according to the comparison result comprises;
configuring a predetermined time corresponding to each of the plurality of modulation periods;
determining a voltage level of the first terminal of the induction coil according to the comparison result and determining whether to start a modulation period corresponding to the first terminal among the plurality of modulation periods accordingly, when an indication of signal modulation is received;
starting a timer when the modulation period starts; and
determining the voltage level of the first terminal of the induction coil according to the comparison result and determining whether to stop the modulation period accordingly, when the timer expires on the predetermine time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A signal rectification and modulation device for a receiving-end module of an induction type power supply system, the receiving-end module comprising an induction coil for receiving power from a supplying-end module of the induction type power supply system, the rectification and modulation device comprising:
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a first rectification transistor, coupled between a first terminal of the induction coil and a ground terminal, for performing rectification on the first terminal of the induction coil; a second rectification transistor, coupled between a second terminal of the induction coil and the ground terminal, for performing rectification on the second terminal of the induction coil; a first rectification control module, coupled to the first terminal and the second terminal of the induction coil and the first rectification transistor, for outputting a first rectification control signal to control the first rectification transistor to perform rectification according to voltages on the first terminal and the second terminal of the induction coil; a second rectification control module, coupled to the first terminal and the second terminal of the induction coil and the second rectification transistor, for outputting a second rectification control signal to control the second rectification transistor to perform rectification according to the voltages on the first terminal and the second terminal of the induction coil; a first modulation control module, coupled to the first terminal of the induction coil, for performing signal modulation on the first terminal; a second modulation control module, coupled to the second terminal of the induction coil, for performing signal modulation on the second terminal; a reference voltage generator, for generating a reference voltage; a comparator, coupled to the reference voltage generator and the first rectification control module or the second rectification control module, for comparing the reference voltage with a coil voltage of the induction coil, to generate a comparison result; and a processor, coupled to the comparator, the first rectification control module, the second rectification control module, the first modulation control module and the second modulation control module, for controlling the first modulation control module and the second modulation control module to alternately perform modulation on the first terminal and the second terminal of the induction coil according to the comparison result; wherein the processor controls the second rectification control module to turn off the second rectification transistor to interrupt the rectification on the second terminal of the induction coil when controlling the first modulation control module to perform modulation on the first terminal of the induction coil, and controls the first rectification control module to turn off the first rectification transistor to interrupt the rectification on the first terminal of the induction coil when controlling the second modulation control module to perform modulation on the second terminal of the induction coil. - View Dependent Claims (8, 9, 10)
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Specification