Method and apparatus for oversampled, noise-shaping, mixed-signa

Details Method and apparatus for oversampled, noise-shaping, mixed-signa Method and apparatus for oversampled, noise-shaping, mixed-signa

1996-06-20

1998-07-07

Mullins, James B.

Amplifiers

Miscellaneous

Amplifier protection means

330110, H03F 3217

Patent

active

057775125

ABSTRACT:
A signal processing circuit is provided which includes a frequency selective network in a feedback loop for noise shaping purposes. A sampling analog-to-digital converter in the feedback loop operates at a sample frequency substantially above the Nyquist frequency. A switching device is driven by the sampling analog-to-digital converter and produces a continuous-time output signal which is continuously monitored by and fed back to the frequency selective network for noise and distortion correction in the feedback loop. This is in contrast to traditional techniques which employ only state feedback. State feedback (i.e., digital or sampled) of the output of the analog-to-digital converter may also be employed in combination with the continuous-time feedback of the switching device output.

REFERENCES:
patent: 4843339 (1989-06-01), Burt et al.
patent: 5352986 (1994-10-01), Modgil et al.

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