| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a modulation circuit and a modulation method for preventing a direct electric wave, which is caused by parasitic capacity in SAW matched filter as a pulse modulator, namely a signal component transmitted directly from an input terminal to an output terminal, from being radiated as a transmission electric wave to the aerial. <P>SOLUTION: A positive phase single pulse and a reverse phase single pulse are generated. The positive phase or reverse phase single pulse is modulated into a reference pulse string, and the modulated single pulse and the reverse phase single pulse are modulated into a data pulse string and then these are added and generated as an output. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
