Method and system for increased effective resolution in an...

Details Method and system for increased effective resolution in an... Method and system for increased effective resolution in an...

2006-06-13

2006-06-13

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S053000, C327S175000

Reexamination Certificate

active

07061417

ABSTRACT:
In digital-to-analog conversion systems, a method and system for increased effective resolution in an N-bit DAC are provided. Additional resolution may be provided in an N-bit DAC by increasing the number of periods that an N-bit PWM may utilize to generate an output train of pulse widths with a desired duty cycle. An increased resolution bits parameter may correspond to the additional bits necessary to provide the increased resolution. An iterative process by which a desired value is converted into a sequence of N-bit control words may be based on a desired analog value and the increased resolution bits parameter. In addition to higher resolution, most of the output pulse AC energy is concentrated at the N-bit PWM basic frequency and above, allowing for simpler analog filtering of the pulse width modulated signal.

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