Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2011-03-22
2011-03-22
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S143000, C341S152000
Reexamination Certificate
active
07911367
ABSTRACT:
A method for converting an N-bit digital value into an analog value is provided. N-M most significant bits of the digital value are converted into a first PWM signal whose period is a multiple of a base time period. M least significant bits of the digital value are converted into a second PWM signal whose period is a ½Mfraction of the period of the first PWM signal. A third PWM signal is generated by inserting, during the pulse pause of the first PWM signal, the pulse of a selected single period of the second PWM signal into the first PWM signal. Further, the third PWM signal is low-pass filtered.
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Nguyen Linh V
Siemens Milltronics Process Instruments Inc.
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