Electronic Apparatus

• US 20080294005A1
• Filed: 09/20/2005
• Published: 11/27/2008
• Est. Priority Date: 09/21/2004
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Honda, Takemitsu
• Granted Patent: US 8,715,163 B2
• Time in Patent Office: Days
• US Class Current: 600/118
• CPC Class Codes: A61B 1/00016 using wireless means
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 2562/182 Electrical shielding, e.g. using a Faraday cage
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: H05K 9/0024 Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
• CPC Class Codes: H05K 9/0039 Galvanic coupling of ground layer on printed circuit board [PCB] to conductive casing printed shielding conductors, ground planes or power planes for reduction of cross-talk or noise in printed circuits H05K1/0218

Abstract

A processing device (2) includes an analog circuit block (6), a digital circuit block (7), a casing (12) which houses elements including (6) and (7) and serves as a conductive shield member, and a connecting connector (13) which has functions, for example, of electrically connecting the casing (12) and a first ground terminal (6a) provided in the analog circuit block (6). Level of noise signals generated from the analog circuit block (6) is lower than the level of noise signals generated from the digital circuit block (7). Therefore, when the casing (12) is electrically connected to the first ground terminal (6a) provided in the analog circuit block (6), the casing (12) can maintain a stable potential thereby more effectively working as the conductive shield member. Thus, leakage of the noise signals generated at driving of internal electronic circuitry is effectively suppressed in an electronic apparatus such as a receiving apparatus.

Claims

1. An electronic apparatus, comprising:

a first circuit block which has at least a first ground terminal and receives a ground potential via the first ground terminal;

a second circuit block which has at least a second ground terminal, receives the ground potential via the second ground terminal, and generates a noise signal of a level higher than a level of a noise signal of the first circuit block on being driven; and

a conductive shield member which receives the ground potential via the first ground terminal.

2. The electronic apparatus according to claim 1, wherein the first circuit block is an analog circuit block that performs analog processing, and the second circuit block is a digital circuit block that performs digital processing.

3. The electronic apparatus according to claim 1, wherein

the conductive shield member is configured to house the first circuit block and the second circuit block inside,

the electronic apparatus further comprises a receiving antenna arranged outside the conductive shield member, and

the first circuit block and the second circuit block perform predetermined processing on a radio signal received by the receiving antenna.

4. The electronic apparatus according to claim 1, wherein the conductive shield member is integrally formed with a casing which houses the first circuit block and the second circuit block.

5. The electronic apparatus according to claim 4, wherein the casing includes:

a case member which is configured to be hollow inside and which defines an outer shape of the casing,

a conductive coating layer which is formed with a coating of a conductive paint on an inner surface side of the casing member, and

a protective layer which is arranged between an inner surface of the casing member and the conductive coating layer.

6. The electronic apparatus according to claim 1, wherein:

the first circuit block and the second circuit block are formed on at least one board,

the electronic apparatus further comprises an insulating mold layer which is arranged so as to cover the board, the first circuit block, and the second circuit block, and

the conductive shield member is formed with a conductive mold layer formed on the insulating mold layer and electrically connected to the first terminal.

7. A body insertable device system, comprising:

a body insertable device which is introduced inside a subject, acquires intra-subject information, and transmits radio signals containing the intra-subject information to an outside; and

a receiving apparatus which receives the radio signals transmitted from the body insertable device,

the receiving device including;

a first circuit block provided at least with a first ground terminal,

a second circuit block provided at least with a second ground terminal and generating a noise signal of a level higher than a level of a noise signal of the first circuit block on being driven, and

a shield member which receives a ground potential via the first ground terminal.

8. The body insertable device system according to claim 7, wherein the first circuit block performs analog processing, and the second circuit block performs digital processing.