Power output stage compensation for digital output amplifiers
Patent 6414614 Issued on July 2, 2002. Estimated Expiration Date: 
February 22, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 22, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAnalogue and digital convertors using pulse edge modulators with non-linearity error correction Digital converter Method and apparatus for oversampled, noise-shaping, mixed-signal processing Analogue and digital convertors using pulse edge modulators with non-linearity error correction Analogue and digital convertors Pulse modulation power amplifier with enhanced cascade control method Patent #: 6297692 InventorAssigneeApplicationNo. 510035 filed on 02/22/2000US Classes:341/143, Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)330/10, MODULATOR-DEMODULATOR-TYPE AMPLIFIER341/126ANALOG TO OR FROM DIGITAL CONVERSIONExaminersPrimary: Young, BrianAssistant: Nguyen, Dinh Q. Attorney, Agent or FirmInternational ClassH03M 003/00AbstractCircuitry is provided to compensate for distortion introduced into the output signal of a delta sigma digital to analog converter (DAC) by the power output stage of the amplifier. Such distortion is not consistent for a given output data value or short series of data values, but must be either measured and corrected in real time or must be corrected in real time based upon a sophisticated model of the system that predicts the distortion. Correction is applied to one or more feedback loops in the delta sigma converter. Distortion caused by fluctuations in the power supply voltage may also be modeled and corrected in real time.Field of SearchDifferential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)ANALOG TO OR FROM DIGITAL CONVERSION Digital to analog conversion Coarse and fine conversions Analog to digital conversion Coarse and fine conversions Increasing converter resolution (e.g., dithering) With intermediate conversion of digital value to time interval Digital signal to analog resolver or synchro signal CONVERTER COMPENSATION Class D MODULATOR-DEMODULATOR-TYPE AMPLIFIER | |
