Inductive-coupling system and method with compensation to prevent interference
AssigneeRenesas Electronics Corporation
InventorKouichi Yamaguchi
Life of this patent
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Abstract
A transmitting circuit that includes a driving circuit that drives an inductor to transmit data to a semiconductor chip insulated from a semiconductor chip on which the transmitting circuit is mounted. The driving circuit receives an outgoing data, compensates wave distortion of the outgoing data generated from the self-resonance of the inductor, generates a compensated outgoing data, and outputs the compensated outgoing data to drive the inductor, such that the outgoing data is transmitted at a data rate higher than the self-resonant frequency of the inductor.
Claims17
A transmitting circuit for transmitting data with the use of electromagnetic induction generated by driving an inductor, comprising:
- a driving circuit comprising:
- an outgoing signal compensation unit that receives outgoing data, compensates wave distortion of the outgoing data generated from a self-resonance of the inductor and generates a compensated outgoing data, and outputs the compensated outgoing data;
- and
- a driving unit that receives that receives the compensated outgoing data whose data rate is higher than a self-resonant frequency of the inductor, and outputs an outgoing signal that drives the inductor at the data rate of the outgoing data,
- wherein the outgoing compensation unit compensates the wave distortion of the outgoing data based on compensation coefficients determined by a feedback equalizing process on a output waveform of the driving circuit.
A receiving circuit for receiving an outgoing signal generated by electromagnetic induction with the use of an inductor, comprising:
- a determination circuit comprising:
- an incoming signal compensation unit that compensates wave distortion of an incoming signal generated from a self-resonance of the inductor, and generates a compensated incoming signal;
- and
- a determination unit that outputs incoming data at a data rate higher than a self-resonant frequency of the inductor after determining a logic level of outgoing data from the compensated incoming signal,
- wherein the incoming signal compensation unit compensates the wave distortion of the outgoing data based on compensation coefficients determined by a feedback equalizing process on the outgoing data output by the determination unit and an incoming signal.
A communication system comprising:
- a transmission line that includes a first inductor and a second inductor that are electromagnetically coupled with each other;
- a driving circuit that drives the first inductor based on a received outgoing data;
- and
- a determination circuit that generates incoming data based on an incoming signal input via the second inductor,
- wherein the driving circuit and the determination circuit transmit the outgoing data at a data rate higher than self-resonant frequencies of the first and second inductors,
- wherein one of the driving circuit and the determination circuit comprises:
- a compensation unit that compensates wave distortion generated on the transmission line at a rate equivalent to the data rate based on compensation coefficients determined by a feedback equalizing process on a output waveform of the driving circuit.
Dependencies are inferred from the claim text.