High order correction for pulse width modulation (PWM) digital/analog converters with reduced computation
A delta sigma modulator (DSM) may be improved by configuring it to set the high-order nonlinear function values to zero when the quantization value being output is at its minimum or maximum value. In one embodiment, a DSM may include at least a quantizer having an input responsive to one of two stat...
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Main Author | |
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Format | Patent |
Language | English |
Published |
20.02.2019
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Subjects | |
Online Access | Get full text |
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Summary: | A delta sigma modulator (DSM) may be improved by configuring it to set the high-order nonlinear function values to zero when the quantization value being output is at its minimum or maximum value. In one embodiment, a DSM may include at least a quantizer having an input responsive to one of two state variables of the DSM and providing a feedback signal and a modulator output signal. The DSM may also include two mutually nonlinear function blocks, each applying a nonlinear function to the feedback from the quantizer, to form two mutually nonlinear feedback signals. At least one of the nonlinear functions applied by the function blocks may comprise a zero when the modulator output signal is a maximum modulator output signal capable of being output by the quantizer or when the modulator output signal is a minimum modulator output signal capable of being output by the quantizer. |
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Bibliography: | Application Number: GB20160000658 |