AUTOMATIC GAIN CONTROL DEVICE

WIPO Patent Application WO/2012/114656

A1

The present invention provides an automatic gain control device which reduces the time required for automatic gain control during the rough adjustment of automatic gain control processing. A first frequency conversion unit generates an I-system baseband signal on the basis of a high-frequency received signal and a first local signal in a given frequency band. A second frequency conversion unit generates a Q-system baseband signal on the basis of a high-frequency received signal and a second local signal having a phase which is different from the first local signal by 90°. A first and a second variable amplifier amplify the respective I-system and Q-system baseband signals. A first and a second AD conversion unit convert respective amplified I-system and Q-system baseband signals to digital data. A first and a second over-range detection unit detect the over-range of the first and the second CAD conversion units. An automatic gain control unit selects the gain on the basis of the detection information of the over-range, and the respective I-system and Q-system baseband signals. An offset setting unit gives a predetermined offset to the selected gain, and sets a gain after the offset with respect to the first or the second variable amplifier.

MORITA TADASHI

PCT/JP2012/000644

August 30, 2012

January 31, 2012

Click for automatic bibliography generation  

PANASONIC CORP (JP)
MORITA TADASHI

H03G3/20; H03G3/30; H04B1/30

WO2010017147A1

2010-02-11

JP2009065312A	2009-03-26
JP2003110385A	2003-04-11

OGURI, Shohei et al. (JP)
Shohei Oguri (JP)

View/Download PDF      PDF Help

Previous Patent: MEMS RESONATOR

Next Patent: ELECTRICITY STORAGE CONTROL DEVICE, ELECTRICITY STORAGE CONTROL METHOD, MANAGEMENT DEVICE, MANAGEMEN...