Title:
VOICE SIGNAL PROCESSING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2007/119674
Kind Code:
A1
Abstract:
With regard to first voice intermediate frequency signals, signals having frequencies in
the vicinity of their central frequencies are extracted by a first band-pass filter
(10). They are then down converted to second voice intermediate frequency signals
by a mixer (12). With regard to second voice intermediate frequency signals,
signals having frequencies in the vicinity of their central frequencies or lower
are extracted by a low-pass filter. With such an arrangement, FM detection can
be carried out well even if the frequency of the first voice intermediate frequency signal
is deviated.
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Inventors:
TANAKA, Tsutomu (5-5, Keihan-Hondori2-chome, Moriguchi-sh, Osaka 77, 5708677, JP)
田中 努 (〒77 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 Osaka, 5708677, JP)
田中 努 (〒77 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 Osaka, 5708677, JP)
Application Number:
JP2007/057556
Publication Date:
October 25, 2007
Filing Date:
April 04, 2007
Export Citation:
Assignee:
SANYO ELECTRIC CO., LTD. (5-5 Keihan-Hondori 2-chome, Moriguchi-shi Osaka, 77, 5708677, JP)
三洋電機株式会社 (〒77 大阪府守口市京阪本通２丁目５番５号 Osaka, 5708677, JP)
TANAKA, Tsutomu (5-5, Keihan-Hondori2-chome, Moriguchi-sh, Osaka 77, 5708677, JP)
三洋電機株式会社 (〒77 大阪府守口市京阪本通２丁目５番５号 Osaka, 5708677, JP)
TANAKA, Tsutomu (5-5, Keihan-Hondori2-chome, Moriguchi-sh, Osaka 77, 5708677, JP)
International Classes:
H04N5/60; H04B1/26; H04N5/60; H04B1/26
Attorney, Agent or Firm:
YOSHIDA, Kenji et al. (34-12, Kichijoji-honcho 1-chome Musashino-sh, Tokyo 04, 1800004, JP)
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