| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a despread demodulator and a spread spectrum radio receiver which have low voltage and low power consumption. <P>SOLUTION: The back diffusion demodulator has sample and hold circuits 100, 101 for sample-holding an inputted spread signal alternately per sampling intervalΔT, a subtractor 102 for obtaining a difference signal between a result of sample-holding by the circuit 100 and a result of sample-holding by the circuit 101, an A/D converter 103 for sampling the difference signal perΔT to convert it to a digital signal, a polarity converter 104 for inverting the polarity of the difference signal digitized by the A/D converter 103 per 2×ΔT, and a despread processor 105 for applying despread processing to the output signal from the polarity converter 104 to demodulate the data signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
