Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2006-06-15
2008-03-11
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C375S130000
Reexamination Certificate
active
07342528
ABSTRACT:
A spread spectrum system having a self-oscillating delay-line digital pulse width modulator and a method for mitigating electromagnetic interference. The spread spectrum system has a pseudo-random pattern generator connected to a digital-to-analog converter, which in turn is connected to a linear regulator. The linear regulator receives a reference voltage from the digital-to-analog converter and creates a frequency varying voltage that serves as an input voltage for delay elements of a delay-line based digital pulse width modulator. In response to frequency varying input signal, the delay-line based digital pulse width modulator generates a frequency varying voltage that is input to a switching network to vary its switching frequency.
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Ng Wai Tung
Trescases Olivier
Dover Rennie William
Jean-Pierre Peguy
Semiconductor Components Industries L.L.C.
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