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Title:
NOISE CANCELLER
Document Type and Number:
Japanese Patent JP2000101458
Kind Code:
A
Abstract:

To properly eliminate a pulse noise, even if electric field strength fluctuates.

A noise AMP 30 of the noise canceller 21, that eliminates a pulse noise intruded in a receiver 22 amplifies an output of a mixer 26, while a voltage controlled amplifier circuit 31 and a gain control circuit 32 control the gain. A comparator 33 detects the pulse noise from an output of the voltage- controlled amplifier circuit 31. A control circuit 37c selects a capacitor 37a or 37b, in response to an output from an S meter circuit 40, generates a gate signal from an output of the comparator 33 so as to decrease correction quantity, when the electric field strength is high and a switch circuit 34 eliminates pulsating noise.


Inventors:
HORIMOTO MANABU
YOKOYAMA MASAO
Application Number:
JP26820998A
Publication Date:
April 07, 2000
Filing Date:
September 22, 1998
Export Citation:
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Assignee:
FUJITSU TEN LTD
International Classes:
H04B1/10; (IPC1-7): H04B1/10
Attorney, Agent or Firm:
Nishikyo Keiichiro



 
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