Oscillator, rectifier, and transceiver device

Patent metadata

Field	Value
Publication number	US-9225287-B2
Application number	US-201414256546-A
Country	US
Kind code	B2
Filing date	Apr 18, 2014
Priority date	Apr 18, 2013
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

Abstract

An oscillator has an oscillation portion that generates oscillatory electric signals due to a magnetization motion; and a first electric circuit that is connected in parallel to the oscillation portion. A current whose magnitude oscillates flows to the first electric circuit, and the first electric circuit is arranged such that a magnetic field generated by the current is applied to the oscillation portion.

First claim

What is claimed is:

1. An oscillator, comprising:
an oscillation portion that generates oscillatory electric signals due to magnetization motion; and
a first electric circuit that is connected in parallel to the oscillation portion, wherein:
a current whose magnitude oscillates flows to the first electric circuit, and
the first electric circuit is arranged such that a magnetic field generated by the current is applied to the oscillation portion.

2. The oscillator as set forth in claim 1 , wherein:
the oscillation portion is a magnetoresistive effect element.

3. The oscillator as set forth in claim 2 , wherein:
the first electric circuit has a loop portion, and
the loop portion is arranged such that the magnetic field generated by the current flowing through the loop portion is applied to the oscillation portion.

4. The oscillator as set forth in claim 2 , wherein:
an oscillation frequency of the oscillation portion and a resonance frequency of the first electric circuit are equal to each other.

5. The oscillator as set forth in claim 2 , wherein:
an oscillation frequency of the oscillation portion and a resonance frequency of the first electric circuit are different from each other.

6. The oscillator as set forth in claim 1 , wherein:
the first electric circuit has a loop portion, and
the loop portion is arranged such that the magnetic field generated by the current flowing through the loop portion is applied to the oscillation portion.

7. The oscillator as set forth in claim 1 , wherein:
an oscillation frequency of the oscillation portion and a resonance frequency of the first electric circuit are equal to each other.

8. The oscillator as set forth in claim 1 , wherein:
an oscillation frequency of the oscillation portion and a resonance frequency of the first electric circuit are different from each other.

9. A rectifier, comprising:
a rectifying portion that manifests a rectifying action due to a magnetization motion; and
a first electric circuit that is connected in parallel to the rectifying portion, wherein:
a current whose magnitude oscillates flows to the first electric circuit, and
the first electric circuit is arranged such that the magnetic field generated by the current is applied to the rectifying portion.

10. The rectifier as set forth in claim 9 , wherein:
the rectifying portion is a magnetoresistive effect element.

11. The rectifier as set forth in claim 10 , wherein:
the first electric circuit has a loop portion; and
the loop portion is arranged such that the magnetic field generated by the current flowing through the loop portion is applied to the rectifying portion.

12. The rectifier as set forth in claim 10 , wherein:
a rectifying frequency of the rectifying portion and a resonance frequency of the first electric circuit are equal to each other.

13. The rectifier as set forth in claim 10 , wherein:
a rectifying frequency of the rectifying portion and a resonance frequency of the first electric circuit are different from each other.

14. The rectifier as set forth in claim 9 , wherein:
the first electric circuit has a loop portion; and
the loop portion is arranged such that the magnetic field generated by the current flowing through the loop portion is applied to the rectifying portion.

15. The rectifier as set forth in claim 9 , wherein:
a rectifying frequency of the rectifying portion and a resonance frequency of the first electric circuit are equal to each other.

16. The rectifier as set forth in claim 9 , wherein:
a rectifying frequency of the rectifying portion and a resonance frequency of the first electric circuit are different from each other.

17. A transceiver device, comprising:
the oscillator as set forth in claim 1 ; and
a rectifier comprising:
a rectifying portion that manifests a rectifying action due to a magnetization motion; and
a first electric circuit that is connected in parallel to the rectifying portion, wherein:
a current whose magnitude oscillates flows to the first electric circuit, and
the first electric circuit is arranged such that the magnetic field generated by the current is applied to the rectifying portion;

wherein wireless communication or wireless power transmission is performed by electromagnetically coupling the first electric circuit of the oscillator and the first electric circuit of the rectifier.

18. The transceiver device of claim 17 , wherein the oscillation portion is a magnetoresistive effect element.

19. The transceiver device of claim 18 , wherein the rectifying portion is a magnetoresistive effect element.

20. The transceiver device of claim 17 , wherein the rectifying portion is a magnetoresistive effect element.

Assignees

• Tdk Corp

Inventors

• Suzuki Eiji
• Suzuki Tsuyoshi

Classifications

• H03B15/006

  using spin transfer effects or giant magnetoresistance · CPC title

• H03D1/00 Primary

  Demodulation of amplitude-modulated oscillations (H03D5/00, H03D9/00, H03D11/00 take precedence) · CPC title