| 摘要 |
PURPOSE:To save power consumption by taking the only signal from an inverse diffusion processing circuit and stopping the operation of the circuit when the reception intensity is powerful enough. CONSTITUTION:The inverse diffusion processing using a first pseudo noise PN1 is performed on spectrum diffusion reception signals supplied to an input terminal 10 by an inverse diffusion processing circuit 11 to send a terminal (a) to be selected of a changeover switch 15. An inverse diffusion processing circuit 12 sends the output with signals after the inverse diffusion processing using a first pseudo noise PN2 and signals from the inverse diffusion processing circuit 11 added by an adder 13 to a terminal (b) to be selected of the changeover switch 15. A signal intensity detection control circuit 14 detects the intensity of the receiving signal of the input terminal 10 to stop the switching control of the changeover switch 15 and the operation of the inverse diffusion processing circuit 12. |
