Patent ID: 8165313
Filing Date: 2012-04-24
Classification: G10K

Abstract:
1. An ANR circuit to provide ANR comprising: a first ADC; a DAC; a first digital filter; a first pathway within the ANR circuit through which digital data representing sounds flows from the first ADC to the DAC through at least the first digital filter at a first data transfer rate through at least part of the first pathway; a first ANR settings buffer and a second ANR settings buffer to be alternately employed in configuring a first ANR setting and a second ANR setting in synchronization with a transfer of a piece of digital data transferred through at least part of the first pathway at the first data transfer rate; a mask to selectively enable the configuring of one or the other of the first and second ANR settings through alternately employing the first and second ANR settings buffers; and a third ANR settings buffer to store a first failsafe ANR setting to configure the first ANR setting and a second failsafe ANR setting to configure the second ANR setting in response to an instance of instability being detected in the ANR circuit.