MOBILE DEVICE WITH AM RADIO

Abstract

To provide a mobile device with an AM radio which can reduce noise mixed in with a wiring drawn from a bar antenna. A cell-phone 100 includes a bar antenna 22 including a magnetic core and an antenna coil wound around the magnetic core and an AM radio tuner section 20 for performing an AM detection process to a broadcast wave received by the bar antenna 22 and outputting a sound signal after detection. The AM radio tuner section 20 is a one-chip component formed on a semiconductor substrate except for a certain external component, and the one-chip component is placed in proximity to the bar antenna 22.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram showing a configuration of a cell-phone of one embodiment;

FIG. 2 is a diagram showing a detailed configuration of an AM radio tuner section;

FIG. 3 is a perspective view showing a usage state of the cell-phone;

FIG. 4 is a perspective view showing a mounting state of a bar antenna and the AM radio tuner section;

FIG. 5 is a plan view showing a modified example of the mounting state of the bar antenna and the AM radio tuner section; and

FIG. 6 is a plan view showing a modified example of the mounting state of the bar antenna and the AM radio tuner section.

Claims

1. A mobile device with an AM radio comprising: a bar antenna including a magnetic core and an antenna coil wound around the magnetic core; andan AM radio tuner section for performing an AM detection process to a broadcast wave received by the bar antenna and outputting a sound signal after detection, and wherein:the AM radio tuner section is a one-chip component formed on a semiconductor substrate except for a certain external component; andthe one-chip component is placed in proximity to the bar antenna.

2. The mobile device with an AM radio according to claim 1, wherein the external component is a capacitor.

3. The mobile device with an AM radio according to claim 1, further comprising: an antenna holder for holding the bar antenna, and wherein:the one-chip component is mounted on the antenna holder.

4. The mobile device with an AM radio according to claim 1, further comprising: an antenna holder for holding the bar antenna; anda wiring member partially fixed to the antenna holder, and wherein:the one-chip component is mounted on a surface of the wiring member.

5. The mobile device with an AM radio according to claim 4, wherein the external component is mounted at a position adjacent to the one-chip component on the surface of the wiring member.

6. The mobile device with an AM radio according to claim 4, wherein the wiring member is a flexible substrate.

7. The mobile device with an AM radio according to claim 1, wherein a shield member is placed around the bar antenna.

8. The mobile device with an AM radio according to claim 7, wherein the one-chip component is placed further on the bar antenna side than the shield member.

9. The mobile device with an AM radio according to claim 1, further comprising a telephone processing section for processing a telephone call as a mobile telephone.

10. The mobile device with an AM radio according to claim 1, further comprising an audio processing section for reproducing audio data.

11. The mobile device with an AM radio according to claim 1, wherein the one-chip component is formed on the semiconductor substrate by using a CMOS process or a MOS process.