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| Number | Title | Issue Date |
| 6414614 | Power output stage compensation for digital output amplifiers Circuitry 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 se... | 07/02/2002 |
| 6384761 | Second and higher order dynamic element matching in multibit digital to analog and analog to digital data converters A multibit data converter has an output parallel unit element converter fed by a multibit signal, and noise shaping dynamic element matching (DEM) apparatus for selectively activating units in the converter. The DEM apparatus includes a plurality of noise... | 05/07/2002 |
| 6373334 | Real time correction of a digital PWM amplifier Distortion and noise in high power digital PWM amplifiers is reduced by measuring the difference between the desired output signal and the actual output signal on a pulse by pulse basis. This analog error is converted into a digital signal with an analog ... | 04/16/2002 |
