POWER CONTROL FOR MULTICHANNEL SIGNAL PROCESSING CIRCUIT

摘要

A circuit includes an input channel array that includes a plurality of channels to receive a plurality of input signals and generate a plurality of channel output signals. A processor to processes the plurality of channel output signals from the input channel array. The processor and the input channel array are configured to operate in a sleep mode when all of the analog input signals are inactive or an active mode when at least one of the analog input signals is active. A secondary channel samples the plurality of input signals and generates a secondary output signal indicative of activity for at least one of the input signals. A secondary channel detector determines a level of signal activity for any of the input signals during the sleep mode based on the secondary output signal.

主权项

1. A circuit comprising:
an input channel array including a plurality of channels to receive a plurality of input signals and to generate a plurality of channel output signals; a processor to process the plurality of channel output signals from the input channel array, wherein the processor and the input channel array are configured to operate in a sleep mode when all of the input signals are inactive or an active mode when at least one of the input signals is active; a secondary channel to sample the plurality of input signals and to generate a secondary output signal indicative of activity for at least one of the plurality of input signals; and a secondary channel detector configured to determine a level of signal activity for any of the input signals during the sleep mode based on the secondary output signal, the secondary channel detector to enable the processor and the input channel array to enter the active mode in response to the determined level of signal activity.