| 摘要 |
A data transmitter and a data transceiving apparatus using a saw filter are provided to generate two or more up/down chirp signals having nonlinear frequency shift properties which can mutually classify transmission and allot the up/down chirp signals by the binary information of a predetermined bit, and select and transmit a corresponding chirp signal among the two or more up/down chirp signals according to transmission data, thereby making the design of a low-power communication device possible. A pulse generator(51) outputs a pulse signal at regular intervals. A switch(52) has an input terminal, into which the pulse signal of the pulse generator(51) is inputted, and plural output terminals which are selectively connected to the input terminal and selectively outputs the pulse signal, outputted from the pulse generator(51), to one of the plural output terminals. A saw filter array(53) is individually connected to the plural output terminals of the switch(52) and comprises plural saw filters which chirp-modulate the inputted pulse signal and output chirp signals having nonlinear frequency shift properties which can be mutually classified. A controller(54) controls the switch(52) so that the chirp signal corresponding to transmission data can be outputted if data of a predetermined bit and plural chirp signals are set to be one-to-one correspondence and the transmitting data is inputted.
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