Integrated tuner circuit with antenna control

• US 20080009252A1
• Filed: 07/05/2007
• Published: 01/10/2008
• Est. Priority Date: 07/06/2006
• Status: Abandoned Application

• Current Assignee: Dibcom
• Original Assignee: Dibcom
• Inventors: Jonnson, Jonas
• Application Number:
  US11/822,415
• Publication Number:
  US 20080009252A1
• Time in Patent Office: Days
• US Class Current: 455/193.1
• CPC Class Codes: H03J 3/20 of single resonant circuit by varying inductance only or capacitance only

Abstract

This integrated tuner circuit (2) for radiofrequency signals is suitable to be connected to at least one antenna (22; 42A, 42B), wherein the integrated circuit comprises an internal resonance stage (10) with at least one trimable capacitance (12) adapted to be connected to the antenna and to resonate therewith and wherein the integrated circuit also comprises a control unit (20) adapted to control the value of said at least one trimable capacitance to change the resonance value of the antenna.

Claims

1. Integrated tuner circuit (2) for radiofrequency signals suitable to be connected to at least one antenna (22;

42A, 42B), wherein the integrated circuit comprises an internal resonance stage (10) with at least one trimable capacitance (12) adapted to be connected to the antenna and to resonate therewith and wherein the integrated circuit also comprises a control unit (20) adapted to control the value of said at least one trimable capacitance to change the resonance value of the antenna.

2. Integrated tuner circuit according to claim 1, wherein said trimable capacitance of said internal resonance stage is connected between a terminal (OUT;

OUT A) of the integrated tuner circuit adapted to be connected to an antenna (22;

42A, 42B) and a terminal adapted to be connected to a ground (GND).

3. Integrated tuner circuit according to claim 1, being further suitable to be connected to an external resonance stage (30), wherein the integrated circuit comprises a voltage generator (8) adapted to enable said external resonance stage.

4. Integrated tuner circuit according to claim 3, further comprising an internal switch (14) to connect or disconnect said voltage generator.

5. Integrated tuner circuit according to claim 4, wherein said trimable capacitance is connected to a terminal (OUT) of said integrated tuner circuit and said voltage generator (8) is connected to the same terminal of the integrated tuner circuit through said internal switch (14).

6. Integrated tuner circuit according to any one of claims 1 to 5, wherein said control unit (20) is adapted to receive configuration information and to control the value of the trimable capacitance depending upon said configuration information.

7. Integrated tuner circuit according to any one of claims 1 to 6, wherein said control unit (20) is adapted to receive transmission quality information and to control the value of the trimable capacitance depending upon said transmission quality information.

8. Integrated tuner circuit according to any one of claims 1 to 7, further adapted to be connected to several antennas (42A, 42B) and comprising an internal switch stage (40) to switch between said antennas, said internal resonance stage (10) being suitable to be connected to at least one of said antennas.

9. Integrated tuner circuit according to any one of claims 1 to 8, wherein said trimable capacitance is formed of several individual capacitances connected in parallel, each individual capacitance being series connected with a transistor functioning as a switch.

10. Integrated tuner circuit according to any one of claims 1 to 9, wherein said trimable capacitance comprises at least one Metal Insulator Metal capacitance.