Spread spectrum clock generating circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 26, 2013
Grant Date -
Mar 3, 2011
app pub date -
Aug 20, 2010
filing date -
Aug 27, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spread spectrum generating circuit comprises an external PLL and an internal PLL. The external PLL comprises a phase detector, a low-pass filter, a voltage-controlled oscillator and a frequency divider, each of them connecting successively. The frequency divider is connected to the phase detector in order to form an external loop. The internal PLL comprises the phase detector, the low-pass filter and the voltage-controlled oscillator of the external PLL, each of them connecting successively. An output terminal of the voltage-controlled oscillator connects with a counter, and the output terminal of the counter connects to an input of the oscillator in order to form an internal loop. The present invention is compatible with the conventional ones, and has lower design risk and higher circuit reliability; compared with the general circuit, it has drastically reduced the area and power consumption, which allows more flexible design and meets more demands.
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