Multi-mode wireless receiver apparatus and resonator circuit design

• US 9,923,387 B2
• Filed: 08/10/2015
• Issued: 03/20/2018
• Est. Priority Date: 01/09/2015
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Lin, Hung-Chih, Hsu, Yen-Hsun, Hong, Hao-Ping
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Evans, James
• Application Number:
  US14/821,816
• Publication Number:
  US 20160204619A1
• Time in Patent Office: 953 Days
• Field of Search: None
• CPC Class Codes: H01F 2038/146 in combination with capacitive coupling
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

A resonator circuit includes: a first inductive element and a second inductive element that is connected to the first inductive element in series; a first capacitive element, connected to a first end of the first inductive element and a first output end of the resonator circuit; and a set of second capacitive elements connected in series, the set of second capacitive elements having one end connected between the first and second inductive elements and having another end connected between the second inductive element and a second output end of the resonator circuit. The intermediate end of the set of second capacitive elements is used as a third output end of the resonator circuit.

Claims

1. A wireless receiver apparatus, comprising:

a resonator circuit, including;

a first inductive element and a second inductive element that is connected to the first inductive element in series;

a first capacitive element, connected to a first end of the first inductive element and a first output end of the resonator circuit; and

a set of second capacitive elements connected in series, the set comprising a pair of capacitive elements with no intervening elements, the set of second capacitive elements having one end connected between the first and second inductive elements and having another end connected between the second inductive element and a second output end of the resonator circuit; and

a rectifier circuit, configured to provide rectification for a signal from the resonator circuit;

wherein an intermediate end of the set of second capacitive elements is connected to the rectifier circuit.

2. The wireless receiver apparatus of claim 1, wherein the first and second inductive elements and the first capacitive element form a resonant loop for providing a first response signal defined in a first frequency band;

and, the second inductive element and the set of second capacitive elements form another resonant loop for providing a second response signal defined in a second frequency band.

3. The wireless receiver apparatus of claim 1, wherein the first frequency band is a low frequency band, and the second frequency band is a high frequency band.

4. The wireless receiver apparatus of claim 1, wherein the second response signal is transmitted to the rectifier circuit via the intermediate end of the set of second capacitive elements and an end of the second inductive element.

5. The wireless receiver apparatus of claim 1, wherein the resonator circuit is arranged to generate the first response signal defined in the first frequency band when the wireless receiver apparatus operates at a heavy loading condition, and the resonator circuit is arranged to generate a third response signal defined in a third frequency band when the wireless receiver apparatus operates at a light loading condition;

the third frequency band is far away from the first frequency band.

6. The wireless receiver apparatus of claim 1, wherein the rectifier circuit comprises:

three sets of diodes each set comprising two diodes connected in series, the three sets of diodes including a first set of diodes, a second set of diodes, and a third set of diodes, that are connected in parallel;

wherein the first output end of the resonator circuit is connected between the first set of diodes, the second output end of the resonator circuit is connected to the second set of diodes, and an intermediate end of the set of second capacitive elements is connected to the third set of diodes.

7. The wireless receiver apparatus of claim 1, wherein the rectifier circuit comprises:

three sets of switches each set comprising two switches connected in series, the three sets of switches including a first set of switches, a second set of switches, and a third set of switches, that are connected in parallel;

wherein the first output end of the resonator circuit is connected between the first set of switches, the second output end of the resonator circuit is connected to the second set of switches, and an intermediate end of the set of second capacitive elements is connected to the third set of switches.

8. A resonator circuit, comprising:

a first inductive element and a second inductive element that is connected to the first inductive element in series;

a first capacitive element, connected to a first end of the first inductive element and a first output end of the resonator circuit; and

a set of second capacitive elements connected in series, the set comprising a pair of capacitive elements with no intervening elements, the set of second capacitive elements having one end connected between the first and second inductive elements and having another end connected between the second inductive element and a second output end of the resonator circuit;

wherein an intermediate end of the set of second capacitive elements is used as a third output end of the resonator circuit.

9. The resonator circuit of claim 8, wherein the first and second inductive elements and the first capacitive element form a resonant loop for providing a first response signal defined in a first frequency band;

and, the second inductive element and the set of second capacitive elements form another resonant loop for providing a second response signal defined in a second frequency band.

10. The resonator circuit of claim 8, wherein the first frequency band is a low frequency band, and the second frequency band is a high frequency band.

11. The resonator circuit of claim 8, wherein the second response signal is transmitted to the rectifier circuit via the intermediate end of the set of second capacitive elements and an end of the second inductive element.

12. The resonator circuit of claim 8, wherein the resonator circuit is arranged to generate the first response signal defined in the first frequency band when the wireless receiver apparatus operates at a heavy loading condition, and the resonator circuit is arranged to generate a third response signal defined in a third frequency band when the wireless receiver apparatus operates at a light loading condition;

the third frequency band is far away from the first frequency band.