Matched filter circuit

摘要

The present invention has an object to provide a matched filter with further reduced electric power. In a matched filter circuit according to the present invention, the electric power supply is stopped with respect to an unnecessary circuit according to an experience that signal is partially sampled just after the acquisition. Since the spreading code is 1 bit data string, the input signal sampled and held is branched out into the signal groups"1" and "-1" by a multiplexer. The signals in each groups are added in parallel by a capacitive coupling, and the electric power is supplied in the circuit intermittently.