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Title:
STEREO FM RECEIVER
Document Type and Number:
Japanese Patent JPS63169139
Kind Code:
A
Abstract:

PURPOSE: To reduce the sense of incongruity in a reception sound cased by the elimination of multi-pass noise by lowering the multi-pass detection sensitivity when a reception signal contains much higher frequency components.

CONSTITUTION: The titled receiver is provided with a detection circuit 1 to detect an input signal and the level of it, an output circuit 2 to control the processing of the output of the detection circuit 1, a multi-pass detection circuit 3 to detect multi-pass from the output of the detection circuit 1, a control circuit 4 to control an output circuit 2 when the input signal level from the circuit 1 goes to a prescribed value or below or a multi-pass is detected by the circuit 3, and a higher component detection circuit 5 to detect higher components at a prescribed frequency or above in a main signal contained in the output of the detection circuit 1. And the detection circuit 5 lowers the multi-pass detection sensitivity of the multi-pass detection circuit 3 corresponding to the detection level of the higher frequency components. As a result, the sense of incongruity in a reception sound caused by the elimination of multi-pass noise can be reduced.


Inventors:
TAKAYAMA KAZUO
OTOSHI HIROYUKI
Application Number:
JP31584586A
Publication Date:
July 13, 1988
Filing Date:
December 29, 1986
Export Citation:
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Assignee:
FUJITSU TEN LTD
International Classes:
H04B1/16; E02F9/00; F16C11/04; H04H40/72; H04H1/00; (IPC1-7): H04B1/16; H04B17/00; H04H5/00
Attorney, Agent or Firm:
Aoki Akira



 
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