Method of improving the stability of a sigma-delta modulator emp

Details Method of improving the stability of a sigma-delta modulator emp Method of improving the stability of a sigma-delta modulator emp

1995-07-28

1998-04-28

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Increasing converter resolution

341143, H03M 118

Patent

active

057450617

ABSTRACT:
Briefly, in accordance with one embodiment of the invention, a circuit comprises: a sigma-delta modulator including an input signal port, an output signal port, and a signal path. The signal path includes a feedforward signal path and a feedback signal path. The signal path is adapted to be coupled to a dither signal and the circuit is adapted to adjust the dither signal substantially in accordance with a signal applied to the input signal port. In accordance with another embodiment of the invention, a method of improving the stability of a sigma-delta modulator, the modulator employing dither, comprises the steps of: applying a signal to the input port of the sigma-delta modulator; applying a dither signal to the signal path of the sigma-delta modulator; and adjusting the dither signal applied substantially in accordance with the signal applied to the input port.

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