NOISE ELIMINATION DEVICE AND FM RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide a noise elimination device that can eliminate both a multi- path noise and a pulse noise with high accuracy. SOLUTION: A multi-path noise elimination means 5 executes multi-path noise elimination to eliminate a multi-path noise from an FM demodulation signal S4 and outputs a multi-path noise eliminated FM demodulation signal S5 to a noise elimination means 6. The noise elimination means 6 eliminates a high frequency pulse noise from the multi-path noise eliminated FM demodulation signal S5. A storage means 5f in the multi-path noise elimination means 5 outputs a smoothed signal S5h resulting from smoothing the FM demodulation signal S4 for a period when a gate signal S5g is at 'H' (multi- path noise elimination period) as a multi-path noise eliminated FM demodulation signal S5. Further, a gate generating means 5g inactivates the gate signal S5g when a component discrimination result S14 from a means 14 for discriminating component around 19 kHz indicates a deactivated multi-path noise elimination operation.