Title:
ELECTRONIC DEVICE WITH SPEAKER CHANGEOVER SWITCH
Document Type and Number:
Japanese Patent JP3274991
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a speaker changeover electronic device where connection of built-in speakers is disconnected depending on the kind of a microphone connecting to the device.
SOLUTION: The speaker changeover electronic device consists of a main body 1 with a built-in speaker and a microphone section 2 with a built-in speaker that connects to the main body 1. First resistors R3 with different resistance to indicate the presence of the built-in speaker are provided to the microphone section 2. When the microphone section 2 connects to the main body 1, the main body 1 detects the presence of the 1st resistors R3 to discriminate the speaker built-in microphone section 2 and the main body 1 inactivates the operation of a speaker 105 built in itself.
Inventors:
Nobuo Iizuka
Hiroshi Machida
Hiroshi Machida
Application Number:
JP4892098A
Publication Date:
April 15, 2002
Filing Date:
February 13, 1998
Export Citation:
Assignee:
Kenwood Corporation
International Classes:
H04R3/12; (IPC1-7): H04R3/12
Domestic Patent References:
| JP3107835A | ||||
| JP57195291A | ||||
| JP511692A | ||||
| JP5859294A | ||||
| JP570096A |
Attorney, Agent or Firm:
Masahiro Fukuyama
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