Title:
IF FILTER CIRCUIT
Document Type and Number:
Japanese Patent JPH06318832
Kind Code:
A
Abstract:
PURPOSE: To prevent deterioration in the S/N characteristic from being caused even when an out-band signal is larger than an in-band signal.
CONSTITUTION: First and second band pass filters 1, 2 are provided to obtain an entire characteristic as an IF filter and an AGC circuit 4 is inserted between both the filters 1 and 2. Thus, even when a level of an out-band signal is larger than a level of an in-band signal, the S/N characteristic is considerably improved in comparison with the single use of a conventional IF filter.
Inventors:
TAKASUKA KAORU
ADACHI TOSHIO
ADACHI TOSHIO
Application Number:
JP3336593A
Publication Date:
November 15, 1994
Filing Date:
February 23, 1993
Export Citation:
Assignee:
ASAHI CHEMICAL MICRO SYST
International Classes:
H03G3/20; H03G3/30; (IPC1-7): H03G3/20; H03G3/30
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)