Patent ID: 7835477
Filing Date: 2010-11-16
Classification: H03D,H04B

Abstract:
1. A noise canceller that inputs a receiving signal and removes pulse noise superimposed on the receiving signal, the noise canceller comprising: a pulse noise detecting unit that detects the pulse noise superimposed on the receiving signal; an electric field intensity detecting unit that detects an electric field intensity of the receiving signal; a level hold unit that, in the absence of pulse noise, outputs the receiving signal and, when triggered by the detection of the pulse noise by the pulse noise detecting unit, holds a level of the receiving signal for a level hold period; and a level hold period setting unit that sets the level hold period in accordance with the electric field intensity of the receiving signal, the level hold period decreasing as the electric field intensity of the receiving signal becomes higher and increasing as the electric field intensity of the receiving signal becomes lower.