Expansion device connected to information device to thereby expand the functions thereof
First Claim
1. An expansion device used for transmission of data between a computer and a readout device, comprising:
- a main body connect to said computer;
a mounting portion provided on said main body in which said readout device is mountable, said readout device being able to read information processing data from a storage medium storing the information processing data and to read sound producing data from a storage unit storing at least the sound reproducing data;
audio circuits for processing the sound reproducing data;
a first power input portion being supplied with source power for said expansion device from a power supply for said computer;
a second power input portion being supplied with source power for said expansion device from a second power supply other than said power supply for said computer; and
a DC/DC converter connected to the mounting portion and to the audio circuits, wherein operations of said audio circuits and said readout device awe enabled by supplying source power to the DC/DC converter from said second power input portion when said second power input portion has a higher voltage level than said first power input portion and supplying source power to the DC/DC converter from the first power input portion when said first power input portion has a higher voltage level than said second power input portion.
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Accused Products
Abstract
An expansion device connected to a host device to thereby expand the functions thereof. Even when source power is not supplied from the host device, this expansion device, such as a bay unit, enables reproduction of an audio disk inserted thereinto. The bay unit used by being connected to the host device, in a state in which a recording/reproducing device capable of reproducing digital signals and audio signals is accommodated in a bay, has an operation panel for operating the recording/reproducing device, an audio circuit, which includes an amplifying circuit, a speaker, and a volume control, and a second power input portion to be connected to an existing power supply circuit. Further, source power is supplied thereto from the second power input portion. This enables the recording/reproducing device and the audio circuit to operate even when no source power is supplied from the existing power supply circuit, for example, when the power supply for the host device is turned off, and when the bay unit is disconnected from the host device. A battery incorporated in the bay unit may be connected to the second power input portion.
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Citations
16 Claims
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1. An expansion device used for transmission of data between a computer and a readout device, comprising:
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a main body connect to said computer;
a mounting portion provided on said main body in which said readout device is mountable, said readout device being able to read information processing data from a storage medium storing the information processing data and to read sound producing data from a storage unit storing at least the sound reproducing data;
audio circuits for processing the sound reproducing data;
a first power input portion being supplied with source power for said expansion device from a power supply for said computer;
a second power input portion being supplied with source power for said expansion device from a second power supply other than said power supply for said computer; and
a DC/DC converter connected to the mounting portion and to the audio circuits, wherein operations of said audio circuits and said readout device awe enabled by supplying source power to the DC/DC converter from said second power input portion when said second power input portion has a higher voltage level than said first power input portion and supplying source power to the DC/DC converter from the first power input portion when said first power input portion has a higher voltage level than said second power input portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification