Signal transmission through LC resonant circuits

Patent metadata

Field	Value
Publication number	US-9514879-B2
Application number	US-201414479089-A
Country	US
Kind code	B2
Filing date	Sep 5, 2014
Priority date	Oct 21, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

An embodiment of an electronic system includes a first electronic circuit and a second electronic circuit. The electronic system further includes a resonant LC circuit having a resonance frequency for coupling the first electronic circuit and the second electronic circuit; each electronic circuit includes functional means for providing a signal at the resonance frequency to be transmitted to the other electronic circuit through the LC circuit and/or for receiving the signal from the other electronic circuit. The LC circuit also include capacitor means having at least one first capacitor plate included in the first electronic circuit and at least one second capacitor plate included in the second electronic circuit. The LC circuit further includes first inductor means included in the first electronic circuit and/or second inductor means included in the second electronic circuit. The at least one capacitor plate of each electronic circuit is coupled with the corresponding functional means through the possible corresponding inductor means.

First claim

The invention claimed is:

1. A system, comprising:
a first apparatus including:
a first electronic circuit having a first signal node;
a first conductive electrode in the first electronic circuit and electrically coupled to the first signal node; and
a first inductor serially coupled between the first signal node and the first conductive electrode; and

a second apparatus including:
a second electronic circuit having a second signal node and a second conductive electrode that is electrically coupled to the second signal node and capacitively coupled with the first conductive electrode to form a first capacitor with the first conductive electrode; and a third electronic circuit having third and fourth signal nodes and a second inductor coupled across the third and fourth signal nodes and arranged in parallel facing the first inductor to be inductively coupled with the first inductor; and

wherein the first electronic circuit is configured to transmit signals simultaneously from the first electronic circuit to the second and third electronic circuits.

2. The system of claim 1 , wherein the signal comprises a power signal.

3. The system of claim 1 , wherein the signal comprises a data signal.

4. A system, comprising:
a first apparatus including:
a first electronic circuit having a first signal node;
a first conductive electrode in the first electronic circuit and electrically coupled to the first signal node; and
a first inductor serially coupled between the first signal node and the first conductive electrode; and

a second apparatus including:
a second electronic circuit having a second signal node; and
a second conductive electrode electronically coupled to the second signal node and forming a first capacitor with the first conductive electrode; and
a third electronic circuit having a third and fourth signal node; and
a second inductor coupled between the third and fourth signal node and arranged relative to the first inductor to be inductively coupled with the first inductor;

wherein a first signal is transmitted between the first electronic circuit and the third electronic circuit through the inductive coupling between the first and second inductors; and
wherein a second signal is transmitted between the first electronic circuit and the second electronic circuit through the capacitive coupling of the first capacitor.

5. The system of claim 4 , wherein at least one of the first and second signals comprises a power signal.

6. The system of claim 4 , wherein at least one of the first and second signals comprises a data signal.

7. The system of claim 4 , wherein the first and second apparatuses are disposed on a same integrated-circuit die.

8. The system of claim 4 , wherein the first and second apparatuses are disposed on respective integrated-circuit dies.

9. The system of claim 4 , wherein the first and second apparatuses are disposed on a same substrate.

10. The system of claim 9 , wherein the substrate comprises a semiconductor substrate.

11. The system of claim 10 , wherein the substrate comprises a printed circuit board.

12. The system of claim 4 , wherein the first and second apparatuses are disposed on respective substrates.

13. A method, comprising:
generating an electronic signal in a first electronic circuit including a first inductive circuit and a first capacitive circuit;
magnetically transmitting the electronic signal through the first inductive circuit to a second inductive circuit in second electronic circuit;
capacitively transmitting the electronic signal through the first capacitive circuit to a second capacitive circuit in a third electronic circuit;
transmitting the electronic signal approximately simultaneously from the first electronic circuit to the second and third electronic circuits through the magnetic and capacitive transmissions,
wherein transmitting the electronic signal approximately simultaneously comprises transmitting the electronic signal through a resonant channel created by capacitive and inductive circuits; and
wherein generating the electronic signal includes generating the electronic signal having a resonant frequency that defines the resonant channel, the resonant frequency having a value based on characteristics of the first capacitive and inductive circuits and the second capacitive and inductive circuits.

14. The method of claim 13 , wherein generating the electronic signal comprises generating a power signal.

15. The method of claim 14 , wherein generating the electronic signal comprises generating a data signal.

Assignees

• St Microelectronics Srl

Inventors

• Pagani Alberto

Classifications

• H01F2038/146

  in combination with capacitive coupling · CPC title

• H02J50/05

  using capacitive coupling · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H04B5/0012

  Electricity · mapped topic