Spread spectrum for switch mode power supplies
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United States of America Patent
Stats
-
Apr 28, 2020
Grant Date -
Sep 22, 2016
app pub date -
Sep 29, 2015
filing date -
Mar 19, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A switch mode power supply may utilize a switching signal to control one or more power switches in the switch mode power supply. A switch mode power supply controller may generate and/or control this switching signal. The controller may reduce the peak spectral noise of the switch mode power supply by varying the instantaneous switching frequency at a constant slew rate magnitude that changes sign at random times. The instantaneous switching frequency may be controlled by a signal that is generated by integrating a random bit stream. The stream may repeat at a sub-audio frequency. The integrator may be lossy, so that the output does not wonder off to an arbitrary value. The frequency modulation signal may be filtered by a low pass filter.
First Claim
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International Classification(s)
- 2015 Application Filing Year
- H02J Class
- 4445 Applications Filed
- 3538 Patents Issued To-Date
- 79.60 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- H02J Class
- 0 % this patent is cited more than
- 5 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Oct 28, 2027 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 28, 2031 |
