Inductive-coupling system and method with compensation to prevent interference

• US 9,071,288 B2
• Filed: 01/17/2012
• Issued: 06/30/2015
• Est. Priority Date: 01/17/2011
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Yamaguchi, Kouichi
• Primary Examiner(s): Liu, Shuwang
• Assistant Examiner(s): VARNDELL, ROSS E
• Application Number:
  US13/352,141
• Publication Number:
  US 20120183038A1
• Time in Patent Office: 1,260 Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/32145 the bodies being stacked
• CPC Class Codes: H01L 2224/48145 the bodies being stacked
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H04B 1/034 Portable transmitters
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04L 25/0266 Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
• CPC Class Codes: H04L 25/08 Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults

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.

Claims

1. 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.

2. The transmitting circuit according to claim 1, wherein the outgoing signal compensation unit compensates the wave distortion generated from the self-resonance of the inductor at a rate equivalent to the data rate.

3. The transmitting circuit according to claim 2, wherein the outgoing signal compensation unit compensates the outgoing data targeted for transmission using n pieces of outgoing data respectively sent 1 cycle to n cycles before the outgoing data targeted for transmission is sent, wherein n represents a positive integer.

4. The transmitting circuit according to claim 3, wherein the outgoing signal compensation unit compensates the outgoing data using FIR type filtering.

5. The transmitting circuit according to claim 4, further comprising a coefficient adjusting circuit that adjusts compensation coefficients used for the FIR filtering, which is performed by the outgoing signal compensation unit, based on the output waveform of the driving circuit.

6. The transmitting circuit according to claim 1, wherein the inductor and the driving circuit are formed on a same semiconductor substrate.

7. 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.

8. The receiving circuit according to claim 7, wherein the determination circuit generates the incoming data after determining the logic level of the outgoing data based on the compensated incoming signal.

9. The receiving circuit according to claim 8, wherein the incoming signal compensation unit compensates the wave distortion generated from the self-resonance of the inductor at a rate equivalent to the data rate.

10. The receiving circuit according to claim 9, wherein the incoming signal compensation unit compensates the incoming signal using incoming signals for n cycles respectively received 1 cycle to n cycles before the incoming signal is received.

11. The receiving circuit according to claim 10, wherein the incoming signal compensation unit compensates the incoming signal using FIR type filtering.

12. The receiving circuit according to claim 9, wherein the incoming signal compensation unit compensates the incoming signal using n pieces of incoming data respectively received 1 cycle to n cycles before the incoming signal is received.

13. The receiving circuit according to claim 12, wherein the incoming signal compensation unit compensates the incoming signal with using decision feedback type equalizing processing.

14. The receiving circuit according to claim 13, further comprising a coefficient adjusting circuit that adjusts compensation coefficients used for the decision feedback type equalizing processing, which is performed by the incoming signal compensation unit, based on the outgoing data output and the incoming signal generated by the decision feedback type equalizing processing.

15. The receiving circuit according to claim 7, wherein the inductor and the determination circuit are formed on a same semiconductor substrate.

16. 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.

17. The communication system according to claim 16, wherein at least one of the first and second inductors is formed on the same semiconductor substrate on which a circuit coupled to the at least one of the first and the second inductors is mounted.