Title:
ＡＧＣ回路および無線受信機
Document Type and Number:
Japanese Patent JP6583293
Kind Code:
B2
Abstract:
An AGC circuit for a radio receiver includes a detector converting a high frequency signal into a baseband signal. To reduce generation of a DC offset, the AGC circuit includes: a variable gain amplifier having an amplifier circuit and a high-pass filter, the amplifier circuit amplifying the baseband signal with a variable gain and the high-pass filter coupled to the amplifier circuit and having a cut-off frequency which is variable; a controller supplying a gain control signal; and a blocker temporarily blocking the high frequency signal. Using the block control signal, the controller causes the blocker to start blocking the high frequency signal, before the cut-off frequency of the high-pass filter is switched from high to low.
Inventors:
Koichiro Tanaka
Takeaki Watanabe
Takeaki Watanabe
Application Number:
JP2016569135A
Publication Date:
October 02, 2019
Filing Date:
December 22, 2015
Export Citation:
Assignee:
Socionext Inc.
International Classes:
H04B1/30; H03G3/20; H04B1/16
Domestic Patent References:
| JP200625816A | ||||
| JP964666A | ||||
| JP2003224488A |
Attorney, Agent or Firm:
Maeda patent office