Sigma-delta digital-to-analog converter
AssigneeBroadcom Corporation
InventorsTodd L. Brooks, David S. P. Ho, Kevin L. Miller
Life of this patent
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Abstract
The present invention is directed to a sigma-delta digital to analog converted (DAC) including a digital-sigma delta modulator, a decimation filter, and a multi-bit DAC. The digital sigma-delta modulator receives a digital input signal and produces a quantized digital signal therefrom. The decimation filter receives the quantized digital signal and produces a decimated digital signal therefrom. The multi-bit DAC receives the decimated digital signal and produces an analog output signal therefrom. The analog output signal is representative of the digital input signal.
Claims52
A sigma-delta digital to analog converter (DAC), comprising:
- a digital sigma-delta modulator to receive a digital input signal and produce a quantized digital signal therefrom;
- a decimation filter to receive the quantized digital signal and produce a decimated digital signal therefrom;
- and
- a multi-bit digital to converter (DAC) to receive the decimated digital signal and produce an analog output signal therefrom, the analog output signal being representative of the digital input signal.
A method for converting a digital signal to an analog signal, comprising:
- (a) producing a quantized digital signal based on a digital input signal;
- (b) producing a decimated digital signal based on the quantized digital signal
- (c) producing an analog output signal based on the decimated digital signal, the analog output signal being representative of the digital input signal.
A sigma-delta digital to analog converter (DAC), comprising:
- quantizing means for producing a quantized digital signal based on a digital input signal;
- decimating means for producing a decimated digital signal based on the quantized digital signal;
- outputting means for producing an analog output signal based on the decimated digital signal, the analog output signal being representative of the digital input signal.
Dependencies are inferred from the claim text.