| 摘要 |
A data transmission device is implemented using SAW filters, passive elements. The transmission device includes a controller that receives transmission data, checks the state of every two bits thereof, and controls the input path of a pulse signal according to the checked state; a switching unit that includes selective output terminals and performs switching under control of the controller to output a received pulse signal to one of the output terminals; and a SAW filter array that includes SAW filters, which receive pulse signals respectively from the output terminals and demodulate the pulse signals respectively into analog signals having different frequency characteristics.
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