Apparatus for die-to-die communication

Patent metadata

Field	Value
Publication number	US-10547352-B2
Application number	US-201715454797-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	May 29, 2013
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

In described examples, a first die includes a primary LC tank oscillator having a natural frequency of oscillation to induce a forced oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator.

First claim

What is claimed is:

1. Apparatus comprising:
a first die including a primary LC tank oscillator having a natural frequency of oscillation to induce a forced oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator, the second die separated by a fixed distance from the first die.

2. The apparatus of claim 1 , wherein the first die includes the primary LC tank oscillator having the natural frequency of oscillation to induce the forced oscillation in the secondary LC tank oscillator of the second die coplanar to the first die.

3. The apparatus of claim 1 , wherein the first die includes the primary LC tank oscillator having the natural frequency of oscillation to induce the forced oscillation in the secondary LC tank oscillator of the second die at a fixed angle to the first die.

4. The apparatus of claim 1 , wherein the primary LC tank oscillator is configured to oscillate at the natural frequency in response to a signal from an energy source.

5. The apparatus of claim 4 , wherein the signal is modulated to communicate from the primary LC tank oscillator to the secondary LC tank oscillator via the magnetic coupling.

6. The apparatus of claim 1 , wherein the first die includes an antenna coil with non-radiative dimensions to communicate from the primary LC tank oscillator to the secondary LC tank oscillator via the magnetic coupling.

7. The apparatus of claim 1 , wherein the first die is integral with a conductive pad that includes grooves to prevent eddy current formation on the conductive pad.

8. The apparatus of claim 1 , wherein the natural frequency is a fixed frequency.

9. The apparatus of claim 1 , wherein the forced oscillation includes a current oscillation.

10. Apparatus comprising:
a first die including a primary LC tank oscillator having a natural fixed frequency of oscillation to induce a forced current oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator, wherein the first die includes an antenna coil with non-radiative dimensions to communicate from the primary LC tank oscillator to the secondary LC tank oscillator via the magnetic coupling, the second die separated by a fixed distance from the first die.

11. The apparatus of claim 10 , wherein the first die includes the primary LC tank oscillator having the natural fixed frequency of oscillation to induce the forced current oscillation in the secondary LC tank oscillator of the second die coplanar to the first die.

12. The apparatus of claim 10 , wherein the first die includes the primary LC tank oscillator having the natural fixed frequency of oscillation to induce the forced current oscillation in the secondary LC tank oscillator of the second die at a fixed angle to the first die.

13. The apparatus of claim 10 , wherein the primary LC tank oscillator is configured to oscillate at the natural fixed frequency in response to a signal from an energy source.

14. The apparatus of claim 13 , wherein the signal is modulated to communicate from the primary LC tank oscillator to the secondary LC tank oscillator via the magnetic coupling.

15. The apparatus of claim 10 , wherein the first die is integral with a conductive pad that includes grooves to prevent eddy current formation on the conductive pad.

16. Apparatus comprising:
a first die including a first LC tank oscillator having a natural frequency of oscillation to induce a forced oscillation in a second LC tank oscillator of a separate second die via a first magnetic coupling between the first LC tank oscillator and the second LC tank oscillator, the first die including a third LC tank oscillator and the separate second die including a fourth LC tank oscillator, the first magnetic coupling between the first LC tank oscillator and the second LC tank oscillator to cause the first LC tank oscillator and the second LC tank oscillator to operate as a first channel independent from a second magnetic coupling between the third LC tank oscillator and the fourth LC tank oscillator, the first die mounted to a structure, the second die mounted to the structure.

17. The apparatus of claim 16 , wherein the first LC tank oscillator is configured to oscillate at the natural frequency in response to a signal from an energy source.

18. The apparatus of claim 16 , wherein the first die includes an antenna coil with non-radiative dimensions to communicate from the first LC tank oscillator to the second LC tank oscillator via the first magnetic coupling.

19. Apparatus comprising:
a first die including a primary LC tank oscillator having a natural frequency of oscillation to induce a forced oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator, the first die integral with a conductive pad that includes grooves to prevent eddy current formation on the conductive pad.

20. Apparatus comprising:
a first die including a primary LC tank oscillator having a natural fixed frequency of oscillation to induce a forced current oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator, wherein the first die includes an antenna coil with non-radiative dimensions to communicate from the primary LC tank oscillator to the secondary LC tank oscillator via the magnetic coupling, the first die is integral with a conductive pad that includes grooves to prevent eddy current formation on the conductive pad.

Assignees

• Texas Instruments Inc

Inventors

• Mukherjee Subhashish
• Gopinathan Venugopal

Classifications

• H10W44/248

  for antennas · CPC title

• H10W44/501

  Inductive arrangements (H10W44/20 takes precedence) · CPC title

• H10W44/20

  at high-frequency [HF] or radio frequency [RF] · CPC title

• H03B5/08

  with frequency-determining element comprising lumped inductance and capacitance · CPC title

• H04B5/0075

  Electricity · mapped topic