| 摘要 |
The invention discloses a computer input device with Bluetooth hand-free handset comprises: an electric source module, for providing power to the computer input device, comprising a voltage step-up circuit and a battery, in which the battery can be an one-time-battery or a rechargeable battery used as the electric source for the computer input device; an optical mouse circuit, for detecting movement vector caused by a movement of the computer input device by the principles of optical transmitting and receiving; a Bluetooth module, coupled to the optical mouse circuit, wherein the module is further connected to an antenna for transmitting/receiving signals, a power LED for indicating whether the computer input device is powered, and a link LED for indicating whether the computer input device is in a communication state; an echo cancellation circuit, coupled to the Bluetooth module and used for canceling echoes of audio signals; a sound receptor, coupled to the echo cancellation circuit for receiving the audio signals; an audio signal amplifying circuit, coupled to the echo cancellation circuit for receiving and amplifying the audio signals outputted from the echo cancellation circuit; and a loudspeaker, coupled to the audio signal amplifying circuit for playing sounds corresponding to the audio signals from the audio signal amplifying circuit.
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