Delta sigma modulator with dynamic error cancellation

A method comprising:

• receiving a differential feedback signal and a plurality of selection signals in a digital to analog converter (DAC);
• generating a digital output signal in response to a quantized output signal and a plurality of filter coefficients
• generating a plurality of indexed signals in response to a plurality of selection index signals;
• and
• generating the plurality of selection signals in response to the plurality of indexed signals and the quantized output signal in a vector quantizer, wherein a selection index signal of the plurality of selection index signals is dependent on previously generated plurality of selection signals.

A device comprising:

• a sensor configured to generate a differential input signal in response to a real-world signal;
• a processor coupled to the sensor and configured to process a digital output signal, and
• a delta sigma modulator coupled between the sensor and the processor, and configured to generate the digital output signal, the delta sigma modulator comprising:
• a first input port and a second input port, the first input port and the second input port configured to receive the differential input signal;
• a digital to analog converter (DAC) coupled to the first input port and the second input port, and configured to receive a differential feedback signal and a plurality of selection signals;
• a loop filter coupled to the first input port and the second input port, and configured to generate a differential filtered signal in response to a differential error signal, the differential error signal is proportional to a difference in the differential input signal and the differential feedback signal;
• a quantizer coupled to the loop filter and configured to generate a quantized output signal in response to the differential filtered signal;
• and
• a modified data weighted averaging (DWA) block coupled between the quantizer and the DAC, the modified DWA block configured to receive the quantized output signal and a plurality of selection index signals, and configured to generate the plurality of selection signals.