Mobile communication terminal apparatus, a variable gain amplifier circuit and a gain control circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 23, 2008
Grant Date -
Jun 23, 2005
app pub date -
Nov 29, 2004
filing date -
Dec 1, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In order to avoid disappearance of output symbols in accompaniment with DC voltage fluctuations occurring at the timing of switching gain in receiving systems for mobile telephones or the like compatible with W-CDMA systems, the present invention provides a variable gain amplifier circuit, a gain control circuit and a mobile communication terminal apparatus, in which a PGA section is comprised of PGAs having different amplification widths continuously arranged in plural stages as in, two coarse adjustment PGAs, a fine adjustment PGA and a coarse adjustment PGA from the input side to the output side; and a gain control circuit has a memory storing a history of gain control with regard to the PGA section and a logic circuit individually controlling gain of each PGA.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully