Calibrated PLL for wide band communication semiconductor integrated polar loop transmitter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2007
Grant Date -
Mar 17, 2005
app pub date -
Jun 8, 2004
filing date -
Sep 17, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and thereby enhances the accuracy of an oscillation frequency. The integrated circuit corrects a dispersion of the KV characteristic of the transmission oscillator by calibrating a current Icp of the charge pump inside the phase control loop. More in concrete, the integrated circuit measures a KV value Kv of the transmission oscillator, and calibrates the current Icp of the charge pump so that KvIcp falls into a predetermined value.
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